16Qam/Qpsk Satellite Receivers (4- Input) (Tt1260/Hwo/Hom - TANDBERG TT1260 Reference Manual

Technical Specification
B.5.2 16QAM/QPSK Satellite Receivers (4-input) (TT1260/HWO/HOM)
The HMO Card is a 16QAM, 8PSK, QPSK, BPSK input module. This card provides a
complete digital front end board for DVB-S, DSNG and other contribution applications and
support four L-band inputs
The 16QAM and 8PSK modes of operation are only available if a licence key is purchased.
Methods of remotely controlling the HOM card are the same as for the existing
TT1260/HWO/HM model.
Table B.13: L-band Input Specification
Parameter
Safety Status
Number of inputs
Input connector
Input impedance
Input return-loss
Isolation between inputs
Minimum input level limited by
spurious components
Minimum input level limitation
Symbol rate
Maximum input level
Input frequency
Frequency resolution
Input frequency capture & hold
range
Frequency increments
Oscillator power at input
connector
Noise figure for Pin =-65dBm
Second order intercept point
Third-order intercept point
Page B-12
Specification
SELV
4
F type
75 Ω
12 dB min over specified input frequency range
55 dB min
-60 dBm nominal gain
-75 dBm high gain
This will depend on modulation type, code rate and due to noise figure
Some examples are given below:
QPSK -57 +10*log (Rs/43)
-63 +10*log (Rs/43)
8PSK -54 +10*log (Rs/43)
-60 +10*log (Rs/43)
16QAM -50 +10*log (Rs/43)
-56 +10*log (Rs/43)
-20 dBm for 20.0 ≤ Rs ≤ 43.0 nominal gain
-35 dBm for 20.0 ≤ Rs ≤ 43.0 high gain
For Rs≤ 20.0: -20 + 10*log (Rs/20)
-35 + 10*log (Rs/20)
950 to 2,150 MHz
1 kHz (At software interface level)
BPSK, QPSK: ± 5 MHz
8PSK, 16QAM: ± 2 MHz
1 kHz
< -63 dBm, 40 < Fosc < 2,150 MHz
15 dB typical low gain
9 dB typical high gain
+25 dBm min low gain Pin =-20 dBm
+10 dBm min high gain Pin = -35 dBm
13 dBm typical low gain Pin =-20 dBm
-2 dBm typical high gain Pin =-35 dBm
Reference Guide: TT1260 Contribution Receiver
nominal gain
high gain
nominal gain
high gain
nominal gain
high gain
nominal gain
high gain
ST.RE.E10100.3