Promax -27 Manual De Uso página 81

USER'S MANUAL. PROMAX-27
Accuracy
Carrier level
Signal level resolution
Signal level accuracy
Modulation
Symbol Rate
BROADBAND POWER
LEVEL MEASUREMENT
Measuring range
Bandwidth
Resolution
Accuracy
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
1
Because of safety reasons, the maximum input power over the entire band is limited up to 120
dBµV. The equivalent power level for a group of channels of similar levels is related with the
input power level over the entire band according to the following expression:
L T = L+10 log N (L T : total level , L: mean level of one channel, N: number of channels present).
For higher input power levels, the use of an external attenuator of 20 dB is recommended.
2
For the positive video modulation (L standard) it can vary from 0 to -2 dB among white and
black image.
09/2010
< ± 5 kHz.
60 to 112 dBµV (selectable in 1 dB steps).
1 dB.
3 dB.
QPSK, 8QAM, 16QAM, 32QAM, 64QAM.
from 160 to 5120 ksym/s.
From 70 to 120 dBµV (From 10 dBmV to 60 dBmV
From 5 to 1000 MHz.
1 dB.
± 3 dB (From 5 to 40 °C).
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 42 dB for QAM 64 / 256.
± 2 dB.
10 E-2 to 10 E-10.
1
).
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