Comtech EF Data LBC-4000 - Manual (Page 41)

LBC-4000 L-Band Up/Down Converter System Revision 4
Rear Panel Connections MN/LBC4000.IOM
3–7
3.2.2 Utility Connectors
3.2.2.1 J2 | EXT REF (External Reference) Input Connector (Type ‘BNC’
Female)
The J2 | EXT REF IN (External Reference Input) is used to supply a master reference
to the entire chassis. The input signal supplied here by the user is used for phase‐
locking the internal 10MHz reference oscillator to a customer‐provided 5 or 10 MHz
station clock. The impedance is matched for 50/75Ω, and requires a level in the
range 0.5V‐4.0Vpp square or sine wave.
3.2.2.2 P1 | RELAY (Summary Fault Output) Connector (DB-9F)
The P1 | RELAY summary fault output is a 9‐pin Type "D" female (DB‐9F)
connector.
Table 3-2. P1 | RELAY Connector Pinouts
Pin # Description
1 SUMFLT1_NC
6 SUMFLT1_COM
2 SUMFLT1_NO
7 NC
3 SUMFLT2_NC
8 SUMFLT2_COM
4 SUMFLT2_NO
9 NC
5 GND
Notes – For Normal Fault Relay Logic:
1. Pin 1 to Pin 6: OK – No Fault
2. Pin 2 to Pin 6: Fault