1-12. Receiver Scan Test Functional Description (fig. 1-4)
a. To initiate the scanning mode, a plus or minus 5 vdc is applied to the EXT AZIMUTH (J24) or EXT ELEV (J23)
jacks. The plus or minus 5 vdc is applied to the receiver under test through the GIMBAL COMD switch S17 as the
elevation and azimuth servo commands. The plus and minus 5 vdc is supplied by power supply and the polarity is
selected by the RCVR CURRENT switch S20.
b. When the servo commands are given, the platform responds with an appropriate movement. The time required
for each platform excursion is timed by a stopwatch.
Figure 1-4. Receiver Scan Test Block Diagram.