SDM-2020 Satellite Demodulator
Data Interfaces
Rev.3
A–73
Signal Function/Name
Pin #
Type
Comment
Data 3 B
20
I / O
Mod / Demod
Data 2 B
21
I / O
Mod / Demod
Data 1 B
22
I / O
Mod / Demod
Data 0 B
23
I / O
Mod / Demod
DVALID B
24
I / O
Mod / Demod
SYNC B
25
I / O
Mod / Demod
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.
•
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.
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.
•
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)
Signal Function
Name
Pin #
Type
Comment
1
GND
Signal Ground
Demod Fault Indicator
DF
2
O
Demodulator Summary Fault
Redundancy switch application
SCT-A
SCT-A
3
O
LVDS Clock (A) From Modulator
TX IF ON / OFF
TXOn-
Off
4
I
TTL
EXT Clk-B
MC-B
5
I
Demodulator, LVDS
Mod Fault Indicator
MF
6
O
Modulator Summary Fault
Redundancy switch application
Carrier Detect
CD
7
O
Demodulator
SCT-B
SCT-B
8
O
LVDS Clock (B) From Modulator
EXT Clk-A
MC-A
9
I
Demodulator, LVDS
Note:
Ext clock is designed but not M&C enabled.
Содержание SDM-2020
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