[linrad] Using the Linrad Network

[Joe Taylor <Princeton.EDU; joe@xxxxxxxxxxxxxxxx>]

He Leif and all,

Today I made my first tests of Linrad's network broadcasting 
capability.  I installed Linrad 02.34 and checked it out.  All 
seemed to be well.  I selected "N" on the main menu to 
initialize networking parameters, and then selected "format 4" 
(16-bit raw data) for output.  After toggling network write ON, 
I found that the program continued to run correctly in Weak CW mode.

Unfortunately, I did not have good luck with any of the other 
data formats.  In particular, formats 7, 8, and 9 caused the 
program to produce broken sound output -- that is, frequent gaps 
in the Rx background noise when an active frequency is selected 
with the mouse.

Hitting "T" while receiving, so as to display timing 
information, shows an apparent A/D sampling rates as follows:

Format A/D
-----------
4     96 kHz
7    ~30
8    ~73
9    ~49

Obviously, something is seriously wrong!

I did notice that when using Format 9, although the audio on the 
master computer has frequent interruptions, watzo running on a 
second computer displays waterfall data that looks more or less 
correct.

I tried to use one instance of xlinrad to broadcast "format 4" 
data, and a second instance of xlinrad on the same computer 
receiving the raw 16-bit data.  This failed with error #1272 
("Write to network socket returned an error") on the master and 
error #1274 ("Network read failed") on the slave.

Can you help me to understand what may be wrong in my setup? 
The computer on which Linrad is running is reasonably fast (2.7 
GHz P4, 0.5 MB cache, 1.25 GB memory), and is around 20% busy 
when running xlinrad.

	-- 73, Joe, K1JT

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