Date   

Re: Audio setup - not trying to start WWIII :)

Paul Cassel <paul@...>
 

While the echo reflector is a great tool it sometimes does not appear to resolve some level issues.  What you may wish to try is connect to REF 2 and monitor the Live365 feed that I stream from one of our nodes here in Kitchener.  Listen to how users on your node sound relative to other nodes that you feel have great audio.   Or if you are close enough to another node switch between your repeater and the other node repeater and set your Line In level until the two sound equal.
 
As long as you have your TX audio from the Linux box to your repeater sounding great the above is an easy way to be your own critic.  I have a Cushman Service Monitor however I prefer to use the above method as its all about what you sound like compared to what the IFR, CUSHMAN say  :-)
 
Speaking of WWIII I am treading into a mine field to bring this topic up here but as far as I'm concerned the best sounding node audio is from nodes using speaker audio through an 8 > 600 ohm transformer into the Line-In on the SB. 
 
FLAK JACKET ON!
 
BTW for those not aware of the Live365 feed goto www.kwarc.org/listen/ for details.
 
Enjoy
Paul VE3SY
open nodes 241 and 242
Kitchener, Ontario
 

----- Original Message -----
From: ne1h@...
Sent: Monday, August 20, 2001 12:45 PM
Subject: [irlp] Audio setup - not trying to start WWIII :)

Ok,

So, I have been pulling my hair out trying to get my audio levels set
correctly.  I decided to get scientific about it and maybe that is
where I should have stopped.

Here is what I have done so far.

a) I play the audiotest file and with a service monitor connected to
my link radio, I setup for 4khz of deviation

b) Then I connect to the echo reflector and adjust RX (input) levels
on the soundcard with a 3khz deviation 1khz note tone, so that I get
3khz of deviation back from the reflector.

c) I then checked the 1khz - 4khz of deviation in 1khz steps and it
was pretty linear.

So, this morning, I connected to a node and they said my levels to
them were low and their levels to me were really HOT.

So I give up.

Someone give me a foolproof baseline method???

The way, this really should be done is as follows.

a) play audiotest and adjust for 4khz
b) get someone to do the same on their end of a link
c) generate a 1khz tone, 3khz dev signal on my end of the link and
I'll adjust my input to the soundcard until you have 3khz of
deviation on the other end
d) now they do the same while I tell them what the deviation is

That's how you get a real scientific approach.  Course you should do
it for ever 1khz of deviation up to 5 and you should really do it for
ever 500hz of tone from 500hz - 3.5khz.

The system should be linear and it should reproduce somewhat linear
results (it is a lossy compression schema, so it will never be
prefect)

But I don't want to go there now, I want to get something that sounds
resonsable for now....

Any help or process solicited,
Alan



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Re: Audio setup - not trying to start WWIII :)

Randy Neals <rneals@...>
 

Hi Paul,
 
Your audio configuration with a mtching transformer from Speaker-Out to Line-In would ensure proper imedance matching and thus proper opeation of the pre-emp/de-emp circuitry in the radio.
 
I had a concern about impedance with teh IRLp instruction that suggest bridging the stero audio in and out on the SB carf in the PC.
 
What was the previous configuration that you compared the audio too, and do you think the difference could be impedance matching, or picking off audio prior to de-emphasis. (Some radios have de-emphsis in the audio amplifications stage.
 
Randy, VE3RWN
Bethany, Ontario
 
 

----- Original Message -----
Sent: Monday, August 20, 2001 2:33 PM
Subject: Re: [irlp] Audio setup - not trying to start WWIII :)

While the echo reflector is a great tool it sometimes does not appear to resolve some level issues.  What you may wish to try is connect to REF 2 and monitor the Live365 feed that I stream from one of our nodes here in Kitchener.  Listen to how users on your node sound relative to other nodes that you feel have great audio.   Or if you are close enough to another node switch between your repeater and the other node repeater and set your Line In level until the two sound equal.
 
As long as you have your TX audio from the Linux box to your repeater sounding great the above is an easy way to be your own critic.  I have a Cushman Service Monitor however I prefer to use the above method as its all about what you sound like compared to what the IFR, CUSHMAN say  :-)
 
Speaking of WWIII I am treading into a mine field to bring this topic up here but as far as I'm concerned the best sounding node audio is from nodes using speaker audio through an 8 > 600 ohm transformer into the Line-In on the SB. 
 
FLAK JACKET ON!
 
BTW for those not aware of the Live365 feed goto www.kwarc.org/listen/ for details.
 
Enjoy
Paul VE3SY
open nodes 241 and 242
Kitchener, Ontario
 
----- Original Message -----
From: ne1h@...
Sent: Monday, August 20, 2001 12:45 PM
Subject: [irlp] Audio setup - not trying to start WWIII :)

Ok,

So, I have been pulling my hair out trying to get my audio levels set
correctly.  I decided to get scientific about it and maybe that is
where I should have stopped.

Here is what I have done so far.

a) I play the audiotest file and with a service monitor connected to
my link radio, I setup for 4khz of deviation

b) Then I connect to the echo reflector and adjust RX (input) levels
on the soundcard with a 3khz deviation 1khz note tone, so that I get
3khz of deviation back from the reflector.

c) I then checked the 1khz - 4khz of deviation in 1khz steps and it
was pretty linear.

So, this morning, I connected to a node and they said my levels to
them were low and their levels to me were really HOT.

So I give up.

Someone give me a foolproof baseline method???

The way, this really should be done is as follows.

a) play audiotest and adjust for 4khz
b) get someone to do the same on their end of a link
c) generate a 1khz tone, 3khz dev signal on my end of the link and
I'll adjust my input to the soundcard until you have 3khz of
deviation on the other end
d) now they do the same while I tell them what the deviation is

That's how you get a real scientific approach.  Course you should do
it for ever 1khz of deviation up to 5 and you should really do it for
ever 500hz of tone from 500hz - 3.5khz.

The system should be linear and it should reproduce somewhat linear
results (it is a lossy compression schema, so it will never be
prefect)

But I don't want to go there now, I want to get something that sounds
resonsable for now....

Any help or process solicited,
Alan



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Time

T. Glen Haggard <glen@...>
 

I have been trying to set the clock on my node but when I send the command
"rdate -s status.irlp.net" it times out before connecting. Is there a
problem with my command or has there been a change on the system?

Glen KK7IH
Reno Node 333


Re: Time

ne1h@...
 

Make sure you did two things when you installed your system.

a) the bios clock should be set to UTC time
b) the system shoulc be configured for your local timezone

c) you have to be root for rdate to work.

You can also try.

rdate -s clock.psu.edu
rdate -s apple.com

There are a bunch of public NTP servers around.

Or you can do like I did and run ntpd on a couple of my other linux
boxes and then configure ntpd on your box to use either a net based
time server or a local one. That way, it's always prefectly in
sync. :)

Alan

--- In irlp@y..., "T. Glen Haggard" <glen@k...> wrote:
I have been trying to set the clock on my node but when I send the
command
"rdate -s status.irlp.net" it times out before connecting. Is there
a
problem with my command or has there been a change on the system?

Glen KK7IH
Reno Node 333


Re: Time

T. Glen Haggard <glen@...>
 

Thanks, I used one of the other addresses and it worked fine. I guess the
other one is no longer working.

glen

----- Original Message -----
From: <ne1h@...>
To: <irlp@...>
Sent: Monday, August 20, 2001 2:03 PM
Subject: [irlp] Re: Time


Make sure you did two things when you installed your system.

a) the bios clock should be set to UTC time
b) the system shoulc be configured for your local timezone

c) you have to be root for rdate to work.

You can also try.

rdate -s clock.psu.edu
rdate -s apple.com

There are a bunch of public NTP servers around.

Or you can do like I did and run ntpd on a couple of my other linux
boxes and then configure ntpd on your box to use either a net based
time server or a local one. That way, it's always prefectly in
sync. :)

Alan

--- In irlp@y..., "T. Glen Haggard" <glen@k...> wrote:
I have been trying to set the clock on my node but when I send the
command
"rdate -s status.irlp.net" it times out before connecting. Is there
a
problem with my command or has there been a change on the system?

Glen KK7IH
Reno Node 333

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IRLP General List

T. Glen Haggard <glen@...>
 

I noticed that there is a lot of talk about script and such on the IRLP
General list. Does this bother anyone but me. I really hate giving out so
much information about the workings of IRLP to the world. Anyone can join
that list. It just seems that at some point that it could become a security
problem. I wish they would move it over to this list.

Glen


Re: IRLP General List

Chad Starling <chad@...>
 

I have to agree with you glen on this subject as your right it could cause us grief in the future..
 
just my 2 cents worth..
 
chad
va3cws
node 281

----- Original Message -----
Sent: Monday, August 20, 2001 5:44 PM
Subject: [irlp] IRLP General List

I noticed that there is a lot of talk about script and such on the IRLP
General list. Does this bother anyone but me. I really hate giving out so
much information about the workings of IRLP to the world. Anyone can join
that list. It just seems that at some point that it could become a security
problem. I wish they would move it over to this list.

Glen





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Re: Node Maintenance/ few questions

Nate Duehr <nate@...>
 

In later versions of RedHat they alias "rm" to "rm -i" to keep folks
from shooting themselves in the foot.

On Sun, Aug 19, 2001 at 02:08:59PM -0000, pete@... wrote:
WARNING: Don't "play" with the IRLP box as user "root"

Enjoy! Ron
Well I do remember once logging onto my box as root, not paying
attention and doing the "olle" rm -rf * in the / directory

boy was I happy :-))

73's Pete


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--
Nate Duehr <nate@...>

GPG Key fingerprint = DCAF 2B9D CC9B 96FA 7A6D AAF4 2D61 77C5 7ECE C1D2
Public Key available upon request, or at wwwkeys.pgp.net and others.


Audio Levels

Thom Forbes
 

So simple I overlooked it. If you are sourcing your repeater audio from
the SPEAKER OUTPUT of the link radio, don't forget that the radios'
volume control will affect you IRLP "uplink" audio levels. Sometimes
just bumping this control "accidentally" will result in overdriving the
sound card input.

73
Thom - KI2N
Node #423


Re: Audio Levels

T. Glen Haggard <glen@...>
 

This is only true of you are using speaker audio.

Glen KK7IH

----- Original Message -----
From: "Thom Forbes" <forbes@...>
To: <irlp@...>
Sent: Monday, August 20, 2001 6:52 PM
Subject: [irlp] Audio Levels


So simple I overlooked it. If you are sourcing your repeater audio from
the SPEAKER OUTPUT of the link radio, don't forget that the radios'
volume control will affect you IRLP "uplink" audio levels. Sometimes
just bumping this control "accidentally" will result in overdriving the
sound card input.

73
Thom - KI2N
Node #423


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@Home

Nima Gharavi <Nima@...>
 

I realize this is somewhat un-related to the general IRLP topic, but it is
still somewhat... since I intended to have a website for my node

I was wondering if any other users of @Home have noticed their port 80 has
been filtered?


Thanks,
Nima, WA6SUP
Node #301


Re: Echo Reflector Problems

Nate Duehr <nate@...>
 

Jeff,

I'm being anti-social and have installed a Perl script on all my Apache
servers that instantly attempts to access any Code Red II infected
machines that try to talk to my machine and get "default.ida" from them
-- it shuts down IIS and then does a graceful shutdown of Windows.

Perhaps these morons will figure out that they've been infected and
patch their machines if they keep shutting off mysteriously. Meanwhile,
I've done no permanent damage, and their machine was certainly trying to
do much more harm to mine than I've done to theirs. Whether or not this
is appropriate behaviour is not up for discussion -- I'm doing it
anyway. Microsoft IIS administrators who don't know how to patch things
-- just go away.

I figure they're eating up the bandwidth I'm paying for, the patch has
been available now for almost two months, and I'm really tired of
reading logs full of X's and N's. :-) None of these servers have any
reasonable reason to be accessing my machine and attempting to find a
"default.ida" file, which I have never had previously and never will
after I take down this script... this is just basic self-defense.

I got the script from http://www.dasbistro.com/default.ida -- enjoy.

Nate

Jeff Young wrote:

Gentlemen:

I have re-enabled my node 444 even though my cable modem is still
being pounded with Port 80 probes from a gazillion different IP
addresses. When connecting to the echo reflector for testing, I get
echoes and delay/missing voice information. Is this still a traffic
problem with red code occupying bandwidth on my connection?

Jeff KB3HF

Yahoo! Groups Sponsor
ADVERTISEMENT



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Re: Time

Nate Duehr <nate@...>
 

WHOOPS... yep. The DNS and databases for status.irlp.net were moved to
the same machine as Reflector #2 a few weeks ago by Richard, but we
never opened up the firewall for rdate and/or we didn't enable an rdate
server on that machine.

I'll have to check with the security folks and see if there's any reason
not to allow it, but it could be turned back on probably -- also as
someone else mentioned there are definitely other publically accessible
rdate servers.

(I wouldn't want you to use rdate off of REF2/status.irlp.net right now
anyway, the clock on THAT machine is drifting! haha... I have a
GPS-based NTP clock and can share the IP address with anyone who would
like it, however it has a nasty TCP/IP stack bug that causes it to set
the Time-To-Live on every packet it replies to to 16, meaning that
anything more that 15 hops away can't use it as a time server because
the packets never get back there.)

If you'd like the IP's of the two GPS NTP clocks to give them a shot,
send me private e-mail and I'll get back to you privately...

73 de Nate, N0NTZ


"T. Glen Haggard" wrote:


I have been trying to set the clock on my node but when I send the command
"rdate -s status.irlp.net" it times out before connecting. Is there a
problem with my command or has there been a change on the system?

Glen KK7IH
Reno Node 333

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Re: Audio setup - not trying to start WWIII :)

FredList <fredlist@...>
 

I spent years trying to solve the same problem as you, stop pulling your
hair out. Here is the basic problem. HAM RADIO IS NOT COMMERCIAL RADIO
there are too many variables outside of your control things like the
repeater you are sending audio to may be a piece of junk, the repeater you
are receiving audio from may have got the audio before de-emphasis, other
repeaters are not set up properly, and are very probably have non-linear
discriminators, hams do not keep their radios setup properly, and why should
they when the manufactures ship them that way. Hams not in the business
couldn't tell if a signal was proper if it hit them in the head. I ran a
test one time, in checking out 30 some radios on the cushman on club night,
I found that all Alnico radios new out of the box were running in excess of
7 khz of deviation. If you have your repeater set at a max of 5 khz like
you should, and the audio gain to produce the proper deviation then anyone
who is over deviated will sound compressed. If you have your transmitter to
allow 10 khz of deviation, then anyone with 7 khz will be loud while anyone
with 5 kHz will sound soft. It is a problem where you are RIGHT, but there
are so many people wrong it is the old "tail wagging the dog" syndrome. I
came to the conclusion that hams are responsible for controlling the
deviation of their radio, and the repeater operator is NOT responsible for
correcting their problem, Here is how I set up my repeaters to make my life
easier. Set the max deviation wide open. With any radio talk into it and
set the average deviation of the repeater with the input audio to match the
average deviation of the input radio a touch tone works nicely. If you want
to get really technical, inject a 1 khz tone, look up the bessler function
of that frequency, and increase the audio until the repeater power drops to
zero. At this point you have done everything you can do to insure that your
are faithfully reproducing the junk or quality coming to the input of the
radio. Do the same thing via the echo reflector.

20 years ago if you told someone that they were over deviated they would
have solved the problem, however during the last 10 years there are so many
appliance operators out there with radios that were wrong from the factory,
its like standing front row of a 250 db rock concert and yelling FIRE,
several of the closest people will leave but most will keep dancing to the
same tune that is being played. The only people who can fix this problem is
the FCC (or the authority having jurisdiction) and they can't its like the
old CB days. Your life will be simpler if you adopt the philosophy that you
are not responsible for fixing their problem, you are NOT the deviation cop.
If they are over deviation on your input where ever the audio came from, it
is their fault for driving your repeater out of limits not yours. I am in
the process of bring up a node here in Orlando I am going to take the
philosophy of telling the operator of the other node when their audio is
really objectionable, if they don't make attempts to resolve it they will
simply go on the lockout list. Life is too short to solve "world hunger"

So now that I have solved the deviation problems of the world, who can help
me with a problem. I am trying to bring up pair of Standard mobile GX
radios up for linking, I have the software to program the radios, but don't
have the programming cable. Can anyone out there give me the pin out.. HELP
please.. FWIW.. Fred wd8kni, Orlando Fl.

----- Original Message -----
From: <ne1h@...>
To: <irlp@...>
Sent: Monday, August 20, 2001 12:45 PM
Subject: [irlp] Audio setup - not trying to start WWIII :)


Ok,

So, I have been pulling my hair out trying to get my audio levels set
correctly. I decided to get scientific about it and maybe that is
where I should have stopped.

Here is what I have done so far.

a) I play the audiotest file and with a service monitor connected to
my link radio, I setup for 4khz of deviation

b) Then I connect to the echo reflector and adjust RX (input) levels
on the soundcard with a 3khz deviation 1khz note tone, so that I get
3khz of deviation back from the reflector.

c) I then checked the 1khz - 4khz of deviation in 1khz steps and it
was pretty linear.

So, this morning, I connected to a node and they said my levels to
them were low and their levels to me were really HOT.

So I give up.

Someone give me a foolproof baseline method???

The way, this really should be done is as follows.

a) play audiotest and adjust for 4khz
b) get someone to do the same on their end of a link
c) generate a 1khz tone, 3khz dev signal on my end of the link and
I'll adjust my input to the soundcard until you have 3khz of
deviation on the other end
d) now they do the same while I tell them what the deviation is

That's how you get a real scientific approach. Course you should do
it for ever 1khz of deviation up to 5 and you should really do it for
ever 500hz of tone from 500hz - 3.5khz.

The system should be linear and it should reproduce somewhat linear
results (it is a lossy compression schema, so it will never be
prefect)

But I don't want to go there now, I want to get something that sounds
resonsable for now....

Any help or process solicited,
Alan


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Re: telnet client for Windows

Tony Langdon, VK3JED <vk3jed@...>
 

At 16:32 20/08/2001 +0000, you wrote:
Hi all,
Does anyone know if a telnet client exists for Windows, to enable one
to minitor the voice ip traffic of a node remotely? I know DC
Well, Windows comes with telnet, but I wouldn't use it. Use SSH instead. You can use either the commercial version of SSH (non commercial licences are free - download at http://www.ssh.com ), or PuTTY, which is a free Windows SSH client that should be available from places like Tucows.

mentioned this a while back, whereby a password protected login to a
node would enable something like this? I know we have had streaming
audio using a Real Audio server, but this facility is something
else...
With the SSH login, you can monitor activity in terms of connects and disconnects, as well as PTT, COS status and DTMF decoding. However, it is _not_ possible to remotely monitor the actual audio. Doing this requires one of the following:

1. A second soundcard and a streaming audio server (Shoutcast/Real Audio/etc) in the IRLP box.
2. A second PC with soundcard and streaming audio servers as above, and an audio interconnection between this and the IRLP node.
3. A PC within repeater range with soundcard (need not be at the same QTH) and streaming audio server.
4. A second IRLP node on the repeater with the (yet to be released I think) Windows client.
5. An iLINK node within repeater range and the iLINK client (not reccommended for unsupervised operation until the authentication scheme is tightened up to an acceptable (for IRLP) level).

For monitoring only, I strongly suggest using the streaming audio option, as this is inherently more secure.


Re: Audio setup - not trying to start WWIII :)

Tony Langdon, VK3JED <vk3jed@...>
 

Your audio configuration with a mtching transformer from Speaker-Out to Line-In would ensure proper imedance matching and thus proper opeation of the pre-emp/de-emp circuitry in the radio.
I would say "that depends". Sure, if the input to the radio is directly into a passive filter, or other circuit which is critical with regards to impedance matching, this is correct. However, a lot of active circuitry isn't that critical, as long as the source impedance is within a broad range. Voltage amplifiers typically require impedances of less than a particular (usually high) value, and they're happy. Current input stages need a high impedance source, again, often not critical.

However, that said, impedance matching is still a good idea.


I had a concern about impedance with teh IRLp instruction that suggest bridging the stero audio in and out on the SB carf in the PC.
With the input, I did that, to make the audio available on both channels. As I am driving it with a signal of a few hundred ohms source impedance, the matching should be fairly close, and the audio at a distant node sounds nice. :) With the output, I used the left channel only. I don't like tying two low impedance outputs together. That could lead to silicon smoke. :)

What was the previous configuration that you compared the audio too, and do you think the difference could be impedance matching, or picking off audio prior to de-emphasis. (Some radios have de-emphsis in the audio amplifications stage.
This is important. The digital characteristics dictate that 'flat' audio (i.e. post de-emphasis) should be used into the SB. This is also the IRLP standard.

The reason for flat audio is that pre-emphasis is used on circuits which have a noise characteristic which rises with frequency, such as an FM channel. It is also used sometimes where signals have low energy in the high frequency spectrum. However, the digital systems have a flat audio response, and there is a significant amount of energy up to 3 kHz, so de-emphasis is not appropriate and may degrade the signal. In addition, CODECs are designed for a particular type of input signal (i.e. voice), which has a characteristic frequency spectrum. Using pre-emphasis on this sort of circuit may cause malfunction of the CODEC, which could be heard as undesirable artefacts on the audio.


Re: Audio setup - not trying to start WWIII :)

Klaus Rung
 

Which Standard GX radios do you have? GX-1500U/V?

Klaus

--- FredList <fredlist@...> wrote:
I spent years trying to solve the same problem as
you, stop pulling your
hair out. Here is the basic problem. HAM RADIO IS
NOT COMMERCIAL RADIO
there are too many variables outside of your control
things like the
repeater you are sending audio to may be a piece of
junk, the repeater you
are receiving audio from may have got the audio
before de-emphasis, other
repeaters are not set up properly, and are very
probably have non-linear
discriminators, hams do not keep their radios setup
properly, and why should
they when the manufactures ship them that way. Hams
not in the business
couldn't tell if a signal was proper if it hit them
in the head. I ran a
test one time, in checking out 30 some radios on
the cushman on club night,
I found that all Alnico radios new out of the box
were running in excess of
7 khz of deviation. If you have your repeater set
at a max of 5 khz like
you should, and the audio gain to produce the proper
deviation then anyone
who is over deviated will sound compressed. If you
have your transmitter to
allow 10 khz of deviation, then anyone with 7 khz
will be loud while anyone
with 5 kHz will sound soft. It is a problem where
you are RIGHT, but there
are so many people wrong it is the old "tail wagging
the dog" syndrome. I
came to the conclusion that hams are responsible for
controlling the
deviation of their radio, and the repeater operator
is NOT responsible for
correcting their problem, Here is how I set up my
repeaters to make my life
easier. Set the max deviation wide open. With any
radio talk into it and
set the average deviation of the repeater with the
input audio to match the
average deviation of the input radio a touch tone
works nicely. If you want
to get really technical, inject a 1 khz tone, look
up the bessler function
of that frequency, and increase the audio until the
repeater power drops to
zero. At this point you have done everything you
can do to insure that your
are faithfully reproducing the junk or quality
coming to the input of the
radio. Do the same thing via the echo reflector.

20 years ago if you told someone that they were over
deviated they would
have solved the problem, however during the last 10
years there are so many
appliance operators out there with radios that were
wrong from the factory,
its like standing front row of a 250 db rock concert
and yelling FIRE,
several of the closest people will leave but most
will keep dancing to the
same tune that is being played. The only people who
can fix this problem is
the FCC (or the authority having jurisdiction) and
they can't its like the
old CB days. Your life will be simpler if you adopt
the philosophy that you
are not responsible for fixing their problem, you
are NOT the deviation cop.
If they are over deviation on your input where ever
the audio came from, it
is their fault for driving your repeater out of
limits not yours. I am in
the process of bring up a node here in Orlando I am
going to take the
philosophy of telling the operator of the other node
when their audio is
really objectionable, if they don't make attempts to
resolve it they will
simply go on the lockout list. Life is too short to
solve "world hunger"

So now that I have solved the deviation problems of
the world, who can help
me with a problem. I am trying to bring up pair of
Standard mobile GX
radios up for linking, I have the software to
program the radios, but don't
have the programming cable. Can anyone out there
give me the pin out.. HELP
please.. FWIW.. Fred wd8kni, Orlando Fl.

----- Original Message -----
From: <ne1h@...>
To: <irlp@...>
Sent: Monday, August 20, 2001 12:45 PM
Subject: [irlp] Audio setup - not trying to start
WWIII :)


Ok,

So, I have been pulling my hair out trying to get
my audio levels set
correctly. I decided to get scientific about it
and maybe that is
where I should have stopped.

Here is what I have done so far.

a) I play the audiotest file and with a service
monitor connected to
my link radio, I setup for 4khz of deviation

b) Then I connect to the echo reflector and adjust
RX (input) levels
on the soundcard with a 3khz deviation 1khz note
tone, so that I get
3khz of deviation back from the reflector.

c) I then checked the 1khz - 4khz of deviation in
1khz steps and it
was pretty linear.

So, this morning, I connected to a node and they
said my levels to
them were low and their levels to me were really
HOT.

So I give up.

Someone give me a foolproof baseline method???

The way, this really should be done is as follows.

a) play audiotest and adjust for 4khz
b) get someone to do the same on their end of a
link
c) generate a 1khz tone, 3khz dev signal on my end
of the link and
I'll adjust my input to the soundcard until you
have 3khz of
deviation on the other end
d) now they do the same while I tell them what the
deviation is

That's how you get a real scientific approach.
Course you should do
it for ever 1khz of deviation up to 5 and you
should really do it for
ever 500hz of tone from 500hz - 3.5khz.

The system should be linear and it should
reproduce somewhat linear
results (it is a lossy compression schema, so it
will never be
prefect)

But I don't want to go there now, I want to get
something that sounds
resonsable for now....

Any help or process solicited,
Alan


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Re: @Home

ne1h@...
 

Port 80 is being filtered everywhere because of the codered virus. I
don't think it's unique to @home.

Alan

--- In irlp@y..., "Nima Gharavi" <Nima@N...> wrote:
I realize this is somewhat un-related to the general IRLP topic,
but it is
still somewhat... since I intended to have a website for my node

I was wondering if any other users of @Home have noticed their port
80 has
been filtered?


Thanks,
Nima, WA6SUP
Node #301


Re: @Home

Ray Vaughan
 

At 07:39 PM 8/21/01 +0000, you wrote:
Port 80 is being filtered everywhere because of the codered virus. I
don't think it's unique to @home.
My LinkSys router on BellSouth is getting hit with about 20 port 80 hits an hour. So BellSouth is at least passing port 80 to it's customer. I feel any ISP is obligated to pass all traffic to a customer, unless they request otherwise. It's up to us to have the blocking in place at the router, or request the ISP to do it for us. I don't have anything on port 80 thanks to this. I'm serving a couple web pages, they're just not on port 80.

A suggestion...

If you have a static IP address (or do some sort of service for dynamic IP addresses) you can still have a web page for your node. Just specify a unique port number. e.g. http://60.60.60.60:83/index.htm

The :83 tells the browser to request at port 83 instead of the default 80. You'll still be listed, but the URL in the link will look a little different. Users won't even notice.

Ray J. Vaughan, MS, CBTE, CERT
KD4BBM PG-7-15266
ray@...
http://www.rayvaughan.com/
§97.1(c)-(d)


Re: Audio setup - not trying to start WWIII :)

ne1h@...
 

Fred, good points and well taken.... I agree with some and disagree
with some, but for now, will just smile and walk away... :)

Ok, on to your question, I may be able to help.... try this for a
start, I'll send you the link when I get home from work, but you
might find it first.

Go go www.google.com and search for gp300 manual (don't ask, but I
found it this way). YOu will get two russian sites back (and a few
others, so you'll have to look through, the russian ones will be
obvious). One will be password protected and the other won't be, I
wish I could eavn remember part of the name, but I can't. Heck I
just remembered that I could figure it out for you... here ya go, not
sure if it's here, but look around and see, you'll be surprised what
is there :)

http://www.radiovnimanie.ru/Progr_Radio_Stan_Frame_2.htm

Alan


--- In irlp@y..., "FredList" <fredlist@s...> wrote:
I spent years trying to solve the same problem as you, stop pulling
your
hair out. Here is the basic problem. HAM RADIO IS NOT COMMERCIAL
RADIO
there are too many variables outside of your control things like the
repeater you are sending audio to may be a piece of junk, the
repeater you
are receiving audio from may have got the audio before de-emphasis,
other
repeaters are not set up properly, and are very probably have non-
linear
discriminators, hams do not keep their radios setup properly, and
why should
they when the manufactures ship them that way. Hams not in the
business
couldn't tell if a signal was proper if it hit them in the head. I
ran a
test one time, in checking out 30 some radios on the cushman on
club night,
I found that all Alnico radios new out of the box were running in
excess of
7 khz of deviation. If you have your repeater set at a max of 5
khz like
you should, and the audio gain to produce the proper deviation then
anyone
who is over deviated will sound compressed. If you have your
transmitter to
allow 10 khz of deviation, then anyone with 7 khz will be loud
while anyone
with 5 kHz will sound soft. It is a problem where you are RIGHT,
but there
are so many people wrong it is the old "tail wagging the dog"
syndrome. I
came to the conclusion that hams are responsible for controlling the
deviation of their radio, and the repeater operator is NOT
responsible for
correcting their problem, Here is how I set up my repeaters to make
my life
easier. Set the max deviation wide open. With any radio talk
into it and
set the average deviation of the repeater with the input audio to
match the
average deviation of the input radio a touch tone works nicely. If
you want
to get really technical, inject a 1 khz tone, look up the bessler
function
of that frequency, and increase the audio until the repeater power
drops to
zero. At this point you have done everything you can do to insure
that your
are faithfully reproducing the junk or quality coming to the input
of the
radio. Do the same thing via the echo reflector.

20 years ago if you told someone that they were over deviated they
would
have solved the problem, however during the last 10 years there are
so many
appliance operators out there with radios that were wrong from the
factory,
its like standing front row of a 250 db rock concert and yelling
FIRE,
several of the closest people will leave but most will keep dancing
to the
same tune that is being played. The only people who can fix this
problem is
the FCC (or the authority having jurisdiction) and they can't its
like the
old CB days. Your life will be simpler if you adopt the philosophy
that you
are not responsible for fixing their problem, you are NOT the
deviation cop.
If they are over deviation on your input where ever the audio came
from, it
is their fault for driving your repeater out of limits not yours.
I am in
the process of bring up a node here in Orlando I am going to take
the
philosophy of telling the operator of the other node when their
audio is
really objectionable, if they don't make attempts to resolve it
they will
simply go on the lockout list. Life is too short to solve "world
hunger"

So now that I have solved the deviation problems of the world, who
can help
me with a problem. I am trying to bring up pair of Standard mobile
GX
radios up for linking, I have the software to program the radios,
but don't
have the programming cable. Can anyone out there give me the pin
out.. HELP
please.. FWIW.. Fred wd8kni, Orlando Fl.

----- Original Message -----
From: <ne1h@h...>
To: <irlp@y...>
Sent: Monday, August 20, 2001 12:45 PM
Subject: [irlp] Audio setup - not trying to start WWIII :)


Ok,

So, I have been pulling my hair out trying to get my audio levels
set
correctly. I decided to get scientific about it and maybe that is
where I should have stopped.

Here is what I have done so far.

a) I play the audiotest file and with a service monitor connected
to
my link radio, I setup for 4khz of deviation

b) Then I connect to the echo reflector and adjust RX (input)
levels
on the soundcard with a 3khz deviation 1khz note tone, so that I
get
3khz of deviation back from the reflector.

c) I then checked the 1khz - 4khz of deviation in 1khz steps and
it
was pretty linear.

So, this morning, I connected to a node and they said my levels to
them were low and their levels to me were really HOT.

So I give up.

Someone give me a foolproof baseline method???

The way, this really should be done is as follows.

a) play audiotest and adjust for 4khz
b) get someone to do the same on their end of a link
c) generate a 1khz tone, 3khz dev signal on my end of the link and
I'll adjust my input to the soundcard until you have 3khz of
deviation on the other end
d) now they do the same while I tell them what the deviation is

That's how you get a real scientific approach. Course you should
do
it for ever 1khz of deviation up to 5 and you should really do it
for
ever 500hz of tone from 500hz - 3.5khz.

The system should be linear and it should reproduce somewhat
linear
results (it is a lossy compression schema, so it will never be
prefect)

But I don't want to go there now, I want to get something that
sounds
resonsable for now....

Any help or process solicited,
Alan


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