1-8. What is the difference, if any, between a black dc patch panel and a red dc patch panel? 1. The black dc patch panel is located closer to the antenna  multicoupler than the red dc patch panel. 2. The black dc patch panel allows the operator to patch the signal to any cryptoequipment,  and  the red dc patch panel restricts  the  printer selected to plain readable text or language 3. The black dc patch panel allows for patching the signal into any cryptoequipment,  and  the red dc patch panel completes the loop for a single feedback circuit 4. None 1-9. What frequency range is primarily  for  mobile  and maritime  units? 1. UHF 2. SHF 3. HF 4. VLF 1-10. Aeronautical  radio navigation,  mobile communications, boat crews, and radar use which of the following  frequency  bands? 1. ELF 2. HF 3. VLF 4. VHF 1-11. 1-12. 1-13. 1-14. When using the VHF system, the  receiver  transfer switchboard  will  either  send the output to the C-1138 Radio Set Control or which of the following? 1. The  speaker  amplifier only 2. The  speaker  amplifier  or both   units 3. The  handset  controller 4. The  receiver  transceiver The UHF band is located in what  frequency  range? 1. 30 to 300 GHz 2. 300 MHz to 3 GHz 3. 3 to 30 MHz 4. 300 kHz to 3 MHz In the UHF system the output of the patch panel is connected  to  the  transmitter side of the transceiver and then connected to which of the following? 1. The C-1138 Radio Set Control 2. The RPU 3. The  antenna  coupler 4. The voice handset Where in the UHF receive system will the voice signal be  decrypted  into  plain language? 1. 2. 3. 4. Prior to the transfer switchboard In the secure voice equipment After the secure voice equipment At the secure voice remote phone unit 2