Comtech EF Data CRS-120 - Manual (Page 34)

1:1 Redundancy Switch Revision 3
Remote Control Operation MN/CRS120.IOM
4–2
4.2 1:1 Operation
After the unit has been cabled in accordance with the instructions and diagram specified in
Section 3.0, the User is ready to initiate operational use. Before proceeding, the User should
check that the Auxiliary Serial link between the two units is functioning correctly. The opening
screen of the modulator indicates whether the modulator is the A or B unit.
CDM-710 Modulator A
Firmware Version X.X.X
The bottom line displays the internal software version. Press [ENTER] to go to the Main menu
screen.
IMPORTANT
Once the modulator is set up for proper operation, the character ‘A, B, or
?’ will appear in the display, when the unit is enabled for 1:1 operation to
designate the A or B modulator or ? to indicate a cable is most likely
disconnected.
From the front panel of the Online unit, access the Main menu, and then select
Config: Aux: 1:1 Mode.
Config: AUX: 1:1 Mode
The Aux: 1:1 menus are used to set up 1:1 operation with the 1:1 redundancy switch.
Config: AUX: 1:1 Mode: Enable / Disable
Selecting Enable sets up the unit for operation with the 1:1 IF switch. Internally an
auxiliary relay sets the alarms connector for the 1:1 operation mode. This permits the
modulator to automatically detect the presence of the 1:1 switch and determine if it is the
A (Online) or B (Standby) unit.
The Main menu indicates the A or B unit. If A or B is opposite of what is expected the
Alarm cables connecting the unit at the 1:1 switch are probably swapped. A ? appears in
1:1 Mode: Ena/Dis
Auto/Man Force ( E)
1:1 Enable/Disable:
Enable Disable ( E)