Figure 5-2. Power Amplifier Test Setup.

TM 11-5820-918-13

FIGURE 5-2.

Power Amplifier Test Setup.

This test checks the frequency sweep of the transmitter.

5-23. FREQUENCY TEST.

Switch the TCS-4B transmitter off and disconnect the antenna.

Set up the test equipment as shown in figure 5-4.

c. On the 1024, place DIRECT/DIPLEX switch in DIPLEX position and the power

output .1 PWR/FULL PWR switch in .1 PWR position, and the sweep limits to 2-30 MHz.

CAUTION

This test must be performed with the DIRECT/DIPLEX switch in the DIPLEX

position and the .lPWR/FULL PWR switch in the .1 PWR position. If these

switch settings are not observed, severe damage to test equipment could

occur.

d. Set the frequency counter to read frequencies from 2 to 30 MHz.

Turn on TCS-4B transmitter.

f. With the 1024 MODE switch in MAN position, press RESET, then press START.

Before the 1024 frequency MHz display reaches 3.00, press STOP. Compare the 1024

frequency reading with the reading on the frequency counter. The readings should

be equal.