COMSPHERE 392xPlus Modems
3-22
November 1996
3920-A2-GN31-30
EchoFreqOff
Echo Frequency Offset displays the frequency offset of the far end echo. This
parameter appears for V.34, V.32 terbo, V.32bis, and V.32 modulations (in
2-wire only).
Phase Hts
Phase Hits reports the total hit count of sudden uncontrolled changes in the
phase of the receive signal for the past 15 minutes. This parameter appears for
V.32 terbo, V.32bis, and V.32 modulations (in 4-wire only).
Impul Hts
Impulse Hits reports the total hit count of large burst or spikes that are larger
than normal peaks of random white noise for the past 15 minutes. This
parameter appears for V.32 terbo, V.32bis, and V.32 modulations (in 4-wire
only).
DropOuts
Drop Outs reports the total number of large reductions in channel gain for the
past 15 minutes. This parameter appears for V.32 terbo, V.32bis, and V.32
modulations (in 4-wire only).
Retrains
Retrains displays the number of retrains over the last 15 minutes of operation.
The total 15-minute accumulation is updated every minute. This parameter
appears for V.32 terbo, V.32bis, V.32, and Trellis Multipoint modulations (in
4-wire only).
Phas Jtr
Phase Jitter is the non-constant variation in the phase of the receive signal
carrier. The jitter is typically introduced by analog power supplies and is
predominantly sign waves with a frequency of 50 Hz or 60 Hz. This parameter
appears for V.32 terbo, V.32bis, and V.32 modulations (in 4-wire only).
NonLinear
Non-Linear Distortion displays distortion which is usually associated with
pulse-code modulation (PCM) compandor noise on the phone line. This
parameter appears for V.32 terbo, V.32bis, V.32, and Trellis Multipoint
modulations (in 4-wire only).
FreqOffset
Frequency Offset reports the variation in all frequencies in the voice band. This
parameter appears for V.32 terbo, V.32bis, and V.32 modulations (in 4-wire
only).
Gain Hts
Gain Hit reports the total number of rapid changes in the receiver power level
for the past 15 minutes. This parameter appears for V.32 terbo, V.32bis, and
V.32 modulations (in 4-wire only).
Clearing VF Counters
The Clear command resets the retrain, impulse hits, gain hits, phase hits, and drop outs.
F1
Status:VF
Display Clear
F2
F3
To clear the VF counters, select Clear.
