Auxiliary connector pinout (j5) – Comtech EF Data SDM-2020 User Manual
Page 165
SDM-2020 Satellite Modulator
Revision 7
ASI/LVDS Data Interfaces MN/SDM2020M.IOM
13-9
13.1.7
A
UXILIARY
C
ONNECTOR
P
INOUT
(J5)
The auxiliary connector is a 9-Pin D female connector.
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.
Refer to Table 13-4 for the 9-Pin D female connector.
Table 13-4. 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 (TDB)
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 (TBD)
Note: Ext Clk is not available.