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- Path: news.interlog.com!moop
- From: moop@interlog.com (Ray Barker)
- Newsgroups: comp.dcom.modems
- Subject: Re: courier diagnostic screen, what does these mean?
- Date: Sun, 07 Jan 96 17:48:56 GMT
- Organization: modus operandi
- Message-ID: <4cp123$mgu@steel.interlog.com>
- References: <bobw.37.002CD9CD@halcyon.com>
- NNTP-Posting-Host: moop.interlog.com
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-
- In article <bobw.37.002CD9CD@halcyon.com>,
- bobw@halcyon.com (Bob Williamson) wrote:
- >Below is a copy of an ati11 screen from a courier v.everything v.34+.
- I am
- >curious what all of these numbers mean. What is ideal, typical etc.
- Is there
- >an FAQ or url for more info on this stuff?
- >
-
- I don't know the meaning of all the terms but I'll give it my best
- shot.
-
- >Modulation V.34
-
- Protocol used. V.34 is the ITU-T standard for 28.8 Kbps transmission.
-
- >Carrier Freq ( Hz ) 1959/1959
-
- Signal that the data stream rides on. Presumably Rx/Tx.
-
- >Symbol Rate 3429/3429
-
- Data rate in cps. Again, presumably Rx/Tx.
-
- >Trellis Code 64S-4D/64S-4D
-
- Encoding scheme used. I'm guessing at 64 state, 4 dimensions.
-
- >Nonlinear Encoding ON/ON
-
- No idea.
-
- >Precoding OFF/OFF
-
- Ditto.
-
- >Shaping ON/ON
-
- Ditto.
-
- >Preemphasis (-dB ) 6/6
-
- Ditto.
-
- >Recv/Xmit Level (-dBm) 45.3/11.6
-
- Power of the Rcd and Txd signal. The Rcv power seems quite long (low).
- Optimal Rcv level is -16 dBm.
-
- >SNR ( dB ) 34.1
-
- Signal to Noise Ratio. Looks healthy.
-
- >Near Echo Loss ( dB ) 2.9
-
- No idea.
-
- >Far Echo Loss ( dB ) 3.6
-
- Ditto.
-
- >Roundtrip Delay (msec) 6
-
- Propogation delay. Time required for data to make a round trip.
-
- >
- >........................Bob
- Williamson.....................................
- >"When I look at my wrists and my hands are still attached,
- >then, I know I am lucky." Charles Bukowski
- >........................BobW@halcyon.com..............................
- ....
-
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