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Vision Series Installation and Operating Handbook
13.3 Rx Demodulator Specifications
Parameter
IF Input Range
L-band Input Range
IF Maximum Composite
Signal
L-band Maximum
Composite signal
Frequency Acquisition
Range
Acquisition Threshold
Acquisition Time
Clock Tracking Range
Receive Filtering
Performance Monitoring
AGC Output
13.4 Clocking and Buffering Specifications
Parameter
Clock Integrity
Tx Clocking
Rx Clocking
Vision Series Modem
Minimum level -130dBm + 10 log symbol rate;
range 50dB above min, limited to 0dBm max
Minimum level -130dBm + 10 log symbol rate;
range 50dB above min, limited to 0dBm max
No more than 20dB above level of desired input up
to a maximum of 0dBm
No more than 20dB above level of desired input up
to a maximum of –10dBm
Selectable from ±1kHz to ±32kHz up to 10 Mbps
(1kHz steps)
±10kHz to ±250kHz from 10 to 52 Mbps (10kHz
steps)
<5dB Es/No QPSK
At 9.6kbps, less than 1s at 6dB Es/No. QPSK
At 10 Mbps, less than 100ms at 6dB Es/No. QPSK
±100ppm minimum
DVB-S2 and Intelsat IESS compliant
α
0.25,
= 0.20
Measured Eb/No (range 0-15dB, ±0.2dB).
Measured Frequency Offset (100Hz resolution).
Wanted signal level strength indicator centred on
the middle of the Rx Input range.
Buffered direct AGC output for antenna tracking
etc.
Vision Series Modem
Frequency Locked Loops give phase-hit immune
operation even w ith poor clock sources such as
routers etc.
External or internal free-running for
ASI; internal for IP. For external,
DVB-
tracking range ±100ppm/min. For
S/DSNG
internal, accuracy depends on
reference fitted (±1ppm to ±1ppb)
Internal free-running (tied to symbol
DVB-S2
rate); accuracy depends on reference
fitted (±1ppm to ±1ppb)
DVB-
Buffer disable - Clock from Satellite
S/DSNG
DVB-S2
Buffer disable - Clock from Satellite
Station Reference (see below )
75 BNC female Station Clock Connector,
transformer isolated.
1MHz to 10MHz in 1kHz steps (accepts sinusoidal
>0dBm or square-w ave)
13-3
α
α
= 0.35,
=
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