Level Measurement - Promax 26 Mode D'emploi

LEVEL MEASUREMENT

Measurement
Analogue channels
Digital channels
Measuring range
Maximum input level
From 5 to 862 MHz
DC to 60 Hz
Readout
IF bandwidth
Input impedance
Accuracy
Analogue channels
Digital channels
DIGITAL SIGNALS MEASUREMENT
MER (Modulation error ratio)
Measurement range
Accuracy
BER (Bit error rate)
Measured before RS decoding
Measurement range
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
Page 4
Video carrier signal level measurement .
Power measurement in the channel bandwidth by
integration method.
From 25 to 120 dBµV. (From -35 dBmV to 60 dBmV)
(1)
120 dBµV. (60 dBmV
60 V DC or RMS
Digital in dBµV, dBmV or dBm and analogue
through a graphic bar. 1 dB resolution
230 kHz ± 50kHz
75 Ω
± 2 dB (from 5 to 40 °C) for negative video
(2)
modulation
± 3 dB (from 5 to 40 °C) for 8 MHz bandwidth
channels.
22 dB to 36 dB for QAM 64 / 256
± 2 dB
10 E-2 to 10 E-8
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 level, BER, MER and constellation diagram
can be stored, for data dumping to printer or PC.
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
USER'S MANUAL. PROMAX-26
)
(3)
.
02/2007