Comtech EF Data CLO-10 - Manual (Page 44)

CLO-10 Link Optimizer Revision 1
Rear Panel Connectors MN/CLO-10.IOM
3.2 External Reference Connector, J1 (BNC-F)
The J1 External Reference Input is used to supply a master
reference to entire chassis. Use of an external reference is not
required. The input/output signal supplied here by the user is used for
phase-locking the internal 10MHz reference oscillator, and can be 1,
2, 5, or 10 MHz. The impedance is matched for 50/75
Ω, and requires
a level in the range 0.5V-4.0Vpp square or sine wave.
3.3 Alarms Connector, P1A (DB-9F)
The P1A Alarms connector is a Type 'D' 9-pin female connector (DB-9F), providing
the user with access to the Form-C relay contacts that indicate the fault status of the
unit. P1A is typically connected to an external fault monitoring system, often found in
satellite earth stations.
Table 3-2. Alarm Interface Connector Pin Assignments
Pin # Signal Function Name
8 Unit is faulted NO
3 Unit is not faulted NC
7 Unit Alarm common COM
1,2,4,5,6,9 NOT USED --
3.4 Remote Control Interface Connector, P1B (DB-9M)
The P1B Remote Control connector is a Type ‘D’ 9-pin male connector (DB-9M), providing
the user with access to both EIA-232 and EIA-485 remote control ports of the modem.
Table 3-3. Remote Control Interface Connector Pin Assignments
Pin # Description Direction
1 Ground
2 EIA-232 Transmit Data Out
3 EIA-232 Receive Data In
4 Reserved—NO CONNECT
5 Ground
6 EIA-485 Receive Data B * In
7 EIA-485 Receive Data A * In
8 EIA-485 Transmit Data B Out
9 EIA-485 Transmit Data A Out
*NOTE: Use for 2-wire EIA-485 operation.
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