Included in this section are signal tracing procedures alignment and neutralization procedures, and voltage and resistance measurements. If any soldered parts are removed or replaced at terminals to which semiconductor diodes are connected, be sure to attach an alligator clip to the diode lead. This acts as a heat sink to protect the diode.
To remove the transceiver chassis from the cabinet, lift the lid and remove the two Phillips head screws located between the lid fasteners. .Remove the four feet and the screw located midway between the rear
feet. From the rear, push the chassis forward until the front panel protrudes from the cabinet about an inch. Grasp the front panel at the edges, and carefully slide the chassis out of the cabinet.
4.2 TRANSMITTER SIGNAL TRACING
Table 4-1 lists appropriate signal generator connection points and normal signal levels. Figure 4-1 shows location of adjustments. Before making measurements, set EMISS10N switch to USB, disable the power amplifier by disconnecting the jumper between J5 and J6, and disconnect the +800 -volt dc plate voltage
Table 4-1. Transmitter Signal Levels.