TIP: Click on subject to list as thread! ANSI
echo: aust_modem
to: Paul Edwards
from: Russell Brooks
date: 1996-02-04 15:40:26
subject: USR Courier V34 problems

BG> Paul, at 06:12 on Feb 02 1996, you wrote to Russell Brooks...



PE>> Freq     Level

PE>>  150     27

PE>>  300     18

PE>>  450     17

PE>>  600     17

PE>>  750     17

PE>>  900     17

PE>> 1050     18

PE>> 1200     18

PE>> 1350     18

PE>> 1500     19

PE>> 1650     19

PE>> 1800     20

PE>> 1950     20

PE>> 2100     21

PE>> 2250     21

PE>> 2400     22

PE>> 2550     22

PE>> 2700     23

PE>> 2850     23

PE>> 3000     23

PE>> 3150     24

PE>> 3300     24

PE>> 3450     27

PE>> 3600     33

PE>> 3750     44



 BG> Those are actually quite good figures, Paul, particularly at the higher 

 BG> end of

 BG> the frequency range.  Good enough for a 31200 or 33600 connect too.



PE>> CONNECT 31200/ARQ/V34/LAPM/V42BIS



 BG> Well, there you go then.  :)



PE>> Modulation               V.34+

PE>> Carrier Freq (Hz)        1829/1829

PE>> Symbol Rate              3200/3200

PE>> Trellis Code             64S-4D/64S-4D

PE>> Nonlinear Encoding       ON/ON

PE>> Precoding                ON/ON

PE>> Shaping                  OFF/OFF

PE>> Preemphasis (-dB)        4/6

PE>> Recv/Xmit Level (-dB)    21/15

PE>> Roundtrip Delay (msec)   4



 BG> Russell might suggest that the Tx level is a tad low, but given the 

 BG> overall

 BG> results, those figures are more than acceptable, especially the Rx level.



Russell was not going to suggest this, in case Paul got anymore dis-heartened.

Russell was infact hoping that Bill would see your dump, and comment in the

positive as well.



PE>> Speed                  28800/26400



 BG> Interesting that the link rate should have actually dropped towards the 

 BG> end of

 BG> the call, although it's not overly uncommon.

 BG> Regards, Bill



Ohh!, to be as diplomatic as Bill G.



Russell





--- Terminate 3.00/Pro


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