Selecting The Relay Drive Level - HP E1472A User Manual

1
Selecting the Relay
Drive Level
Note
Caution
22 Configuring the RF Multiplexer
The relay drive level is set at the factory to +12 Vdc. This is the level used by both
the RF Multiplexer module and the Expander module relays.
DO NOT CHANGE the relay drive level if using the HP E1472A, E1473A,
E1474A, OR E1475A modules.
If external relays of +5 Vdc or +24 Vdc are used with the RF Multiplexer module,
the drive level must be changed as follows:
1. Position the RF Multiplexer on a flat surface.
2. Using a TORX T-10 driver, remove the eight screws (HP P/N 0515-1135).
3. From the rear, carefully lift shield enough to access jumpers.
Relays may be permanently damaged if the incorrect relay drive level is selected.
Change the relay drive level only when ALL relays used (modules 00 AND 01
AND 02) require a +5V or +24V drive level.
The shield is connected to the front panel and will be damaged if bent too far. Do
not move the RF Multiplexer module from the flat surface with the shield in this
condition. It may be necessary to loosen the SMB connector nuts to access the
jumpers.
4. Move both jumpers (HP P/N 1258-0141) from the +12 Vdc position to the
desired drive level. Jumper J200 sets the voltage drive level for the relay
modules connected to P200; Jumper J400 sets the voltage drive level for
the relay modules connected to P400.
5. Reinstall the eight screws.
Figure 2-6 Relay Drive Level Selection
Torx Screws
Chapter 2