Figure 2-38.—AN/SRA-12 antenna filter patch panel with receiver antenna patch panel.

Figure 2-38.—AN/SRA-12 antenna filter patch panel with receiver antenna patch panel. Figure 2-38 shows a receiver antenna filter patch panel, AN/SRA-12, with a receiver patch panel. The AN/SRA-12 provides seven radio-frequency channels in the 14-kHz to 32-MHz range. Any or all of these channels can be used independently of any other channel, or they can operate simultaneously. On the receiver patch panel, a receiver is hardwired to each jack. With the use of patchcords, you can connect a receiver, tuned to a particular frequency, to the antenna by connecting the receiver to the proper jack on the AN/SRA-12. Figure 2-38 shows how the filter assembly is used in combination with other units to pass an RF signal from an antenna to one or more receivers. NOTE When patching, YOU MUST ALWAYS INSERT THE END OF THE ANTENNA PATCH CORD TO THE RECEIVER JACK FIRST. THEN, YOU INSERT THE OTHER END OF THE PATCH CORD INTO THE LOWEST USABLE AN/SRA- 12 JACK. TO UNPATCH, ALWAYS REMOVE THE PATCH CORD FROM THE RECEIVER JACK, THEN THE OTHER END FROM THE FREQUENCY FILTER JACK. An easy way to remember this is always work the patching from the top down. 2-28 Transmitting antenna distribution systems perform the same functions as receiving distribution systems. Figure 2-39 shows a transmitter patch panel. These Figure 2-39.—Transmitter antenna patch panel.