Comtech EF Data SDR-54A - Manual (Page 44)

SDR-54A Satellite Demodulator Revision 4
DEMUX Option MN/SDR54A.IOM
5.3.3 DEMUX 8-Channel Specification
Table 5-4. DEMUX 8-Channel Specification
Parameter Specification
Aggregate Input:
Type
Data/Clock Interface
Data Rate
Clock
Multiplex Technique
Overhead
Synchronous (clock/data).
TTL (inverted data). Data valid on rising edge of clock.
4001.3 kbit/s maximum, the aggregate data rate is the sum of all tributary data rates
plus the multiplex overhead.
50% duty cycle,
± 10%.
Data interleaved time division.
1.3 kbit/s fixed per frame.
Tributary Outputs:
Number of Channels
Data Rate
Type
Data Interface
Clock
1 to 8
600 bit/s to 4000 kbps, (configurable for each tributary in 100 bit/s increments).
Notes:
1. RS-232 maximum data rate is 64 kbit/s.
2. The sum of all tributary data rates plus overhead cannot exceed the
maximum aggregate data rate of 4001.3 kbit/s.
Synchronous clock and data.
RS-422 or RS-232.
50% duty cycle,
± 10%, phase locked to aggregate clock input, 0.25 dB maximum
jitter gain from aggregate clock input.
Lock Time 1 second maximum after demodulator Carrier Detect.
Operational BER Performance Will lock and maintain synchronization with BER ≥10 -3 .
Input Power 5 VDC, ± 10%, 900 mA maximum.
Environmental:
Operating Temperature
Storage Temperature
Humidity
-20
° to +60°C (-4° to 140°F)
-55 ° to +125°C (-67° to 257°F)
≤ 95% Non-condensing.
Interface Connectors:
JP1
JP2
*JP3
*JP4
+5 VDC power, aggregate data, I
2 C communications to demodulator card.
Output sync and mode signals.
26-pin header, for tributary interfaces 1 through 4.
26-pin header, for tributary interfaces 5 through 8.
Breakout Panel Optional: 1 RU breakout panel (UB-54) converts interface to eight 15-pin D sub
connector for separate tributary interfaces.
Unit-to-Unit Delay Variation < 10% of 1/tributary data rate for identically configured demultiplexers.
Note: This is in addition to the delay variation of the base unit.
*Note: JP3 and JP4 headers are connected to the rear panel 25-pin D connectors J5 and J6 respectively
(refer to Section A.3.4).
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