Cable Modem - Promax -27 Manual De Uso

Constellation Diagram
Lock range
Symbol rate
Measurement range
Datalogger
Modulation type
Bandwidth
Frequency tuning
VIDEO / AUDIO RATIO MEASUREMENT (ANALOGUE CHANNELS)
Measurement
Measurement range
Audio subcarrier frequency
Variable
Accuracy
CARRIER / NOISE RATIO MEASUREMENT
Measurement
Analogue channels
Digital channels
Measurement range
Analogue channels
Digital channels
Accuracy

CABLE MODEM

TV/MODEM DATALOGGER FUNCTION
Max. number of loggers
Number of channels/logger
Measurements
TV analogue channels
TV digital channels
Data digital channels
3
For the AM audio carrier (L standard), it can vary from 0 to -3 dB below the V/A value.
Page 4
ITU-J83 (Annex A/B/C) and DOCSIS/EuroDOCSIS
compliant signals.
-10 dBmV to 60 dBmV.
1000 to 7000 Msym/s for QAM 16/64/256.
Power lever, BER and MER for each digital
channel, to send to PC or printer.
QAM 16/32/64/128/256 ITU J83 annex A/B/C and
QPSK.
Selectable.
62.5 kHz.
Ratio of video to audio carrier levels.
From 0 to 30 dB
0.1 — 9.9 MHz.
± 2 dB (from 5 to 40 °C) for FM audio carrier
Ratio between carrier level and the channel's noise
level.
Ratio between the channel power and the noise
level. The frequency where noise is measured is
user definable in absolute or relative value. In the
relative mode, the unit takes as default frequency
offset the value BW/2 + 0.5 MHz.
40-50 dB for input level between 60 and 70 dBµV.
> 50 dB for input level > 70 dBµV.
> 30 dB for input level > 60 dBµV.
± 2 dB (45 — 862 MHz) ± 3 dB (5 — 45 MHz).
DOCSIS / EuroDOCSIS 1.0, 1.1, 2.0.
50 (TV) - 30 (MODEM).
140.
Level, C/N and V/A.
Power, BER and MER.
Upstream and Downstream parameters (Power
level, attenuation,
modulation, symbol rate, BER and MER).).
USER'S MANUAL. PROMAX-27
frequency, bandwidth,
3
.
09/2010