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SDM-2020 Satellite Demodulator
Data 3 B
Data 2 B
Data 1 B
Data 0 B
DVALID B
SYNC B
A.8.6.3
Auxiliary Connector Pinout (J5)
The ausiliary connector is either a 9-Pin D female connector or a modular telephone jack
connector with 6 pins.
•
A pull-up resistor external to the equipment is required. A fault is indicated in the
modulator or demodulator when the open collector is OFF. An ON collector indicates an
OK status.
•
•
•
Signal Function
Demod Fault Indicator
SCT-A
TX IF ON / OFF
EXT Clk-B
Mod Fault Indicator
Carrier Detect
SCT-B
EXT Clk-A
Note: Ext clock is designed but not M&C enabled.
Rev.3
Signal Function/Name
Single ended signals, such as the faults MF and DF, are open collector where:
Voh=12V max. and Vol=0.5V max. @ Iol=8 ma.
Ext Clk is an LVDS input.
Carrier Detect is a TTL output. TX IF ON / OFF is a single ended TTL input.
Table A-42 is the pin-out for a 9-Pin D female connector.
Table A-42. Auxiliary Connector Pinout (J5)
Name
Pin #
DF
SCT-A
TXOn-
Off
MC-B
MF
CD
SCT-B
MC-A
Pin #
Type
20
I / O
Mod / Demod
21
I / O
Mod / Demod
22
I / O
Mod / Demod
23
I / O
Mod / Demod
24
I / O
Mod / Demod
25
I / O
Mod / Demod
Type
1
GND
Signal Ground
2
O
Demodulator Summary Fault
Redundancy switch application
3
O
LVDS Clock (A) From Modulator
4
I
TTL
5
I
Demodulator, LVDS
6
O
Modulator Summary Fault
Redundancy switch application
7
O
Demodulator
8
O
LVDS Clock (B) From Modulator
9
I
Demodulator, LVDS
Data Interfaces
Comment
Comment
A–73
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