User's Manual

68P81093C75-A 9-19

Step 11. Measure the 12dB SINAD sensitivity and make a note

of the level. This level will serve as a baseline for the

receiver sensitivity. If 12 dB SINAD cannot be

achieved, suspect the following:

• Test conﬁguration used does not match that shown

in Figure 6B.

• Excessive loss in the coaxial cables or coupler.

Step 12. Remove the cable connecting the coupler to the top

panel receive port. Connect the coupler to the

duplexer’s antenna port. Connect the duplexer’s

receive port to the station’s top panel receive port, as

in normal station operation. (See Figure 6B.)

Step 13. Measure the 12 dB SINAD once again, and note the

result. The difference between this 12 dB SINAD level

and the level measured in Step 11 reﬂects the insertion

loss of the duplexer. The difference should be no

greater than approximately

• VHF: 1.3 dB

• UHF: 1.6 dB

• 800 MHz: 1.5 dB

If the difference is greater, suspect the following:

• Duplexer receive and transmit ports are reversed

• Loose or damaged cables between the duplexer and

the station

Figure 9. Disabling the Transmitter

Press and hold

Shift Button.

Station Control

Module

Exciter

Module

MAEPF-27037-O

Press Vol Down/

Access Disable

Intcm/Acc D LED

should Flash yellow.

PA Full LED should

NOT illuminate.