On Jul 27 16:39 96, Arthur Marsh of 3:800/812 wrote:

AM> On Thu 25 Jul at 08:20 Bill Grimsley (3:640/305.9{at}fidonet) wrote to Paul 
AM> Sanders:

BG>> Paul, at 20:36 on Jul 23 1996, you wrote to Bill Grimsley...

PS>> A Supra V.34 to my USR Courier V.34+ gave:

PS>> EQM                  = 20
PS>> RX level             = -27dBm
PS>> TX level             = -10dBm

BG>> Nothing wrong with those levels.

PS>> SNR                  = 47dB

BG>> Damn good S/N ratio too.  If I can maintain a 33600 connect 
BG>> with my miserable 38db, you'll have no trouble at all.

AM> Only possible if the call didn't get digitised. 64 kbps PCM using 8000 8 
AM> bit samples per second *can't* give you 47 dB S/N ratio.

That's a point...   BTW - what is the theoretical noise floor for one A/D -
D/A pair at 64k honest PCM?

Regards,
Dave Hatch.

--- Msgedsq 3.20