Term
| State the HF frequency range and application: |
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Definition
| 2-29.999 MHz - Radio line of sight and beyond/long range |
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Term
| State the VHF Operating Frequency Range and application: |
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Definition
30-88 MHz (Radio line of sight)
116-150 MHz (Critical line of sight - ground to air) |
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Term
| State UHF Operating Frequency and application: |
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Definition
| 225-400 MHz (Critical LOS, ground to air) |
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Term
| Limitations of UHF radios: |
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Definition
- Range (critical line of sight)
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Term
| Discuss the use of VHF radios: |
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Definition
- Primary Comms for C2 and fire support on the battlefield
- Primary VHF radio is the SINGCARS.
- Employment considerations:
- Operator maintenance is essential
- Frequency separation, antenna separation, remote rekeying (COMSEC), and power output
- Environmental limitations
- Range (up to 10 miles for manpack)
- Frequency availability
- Multipath interference (for mobile units)
- Common Nets - TAC, MEDEVAC, LFSP, FSC, TACP, Convoy control, Combat Logistics Request
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Term
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Definition
- Long and short range secure voice and data comms (slow - 2.4 kbps)
- Primary advantage - OTH comms
- Primary limitations - frequency allocation/management, bandwidth availability
- Propagation modes
- Ground wave -
- Range 12-22mi manpack, 50-75mi veh
- Free of fading, may last for 24 hr period
- Sky wave -
- Bend radio waves with ionosphere
- Requires higher daytime freq, lower night
- Common nets: Command, NGFS, helicopter support team
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Term
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Definition
AN/PRC 104 (RT 1209)
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secure or plain text
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half-duplex reception and transmission
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High Frequency (HF) voice or data (2-29.999 MHz)
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long range radio communication
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Vehicle configuration AN/MRC 138/142
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Term
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Definition
AN/PRC 113
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Provide secure or plain text
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half-duplex reception and transmission
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VHF (High Band/Aircraft Band 116-149.975 MHz) or
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UHF Line of Site (LOS 225-399.975 MHz)
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voice radio communication (No data capability)
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Term
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Definition
AN/PRC 119 SINGCARS (RT1523)
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Provide secure or plain text, half-duplex, single channel or frequency hopping reception, transmission, and retransmission of VHF voice or data short/medium range radio communication.
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Vehicle configuration is AN/MRC 145
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Term
| Steps to change frequency on RT1523: |
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Definition
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Set FCTN switch to LD.
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Press FREQ on key pad.
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Press CLR on key pad to clear previous frequency.
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Type the FREQ as desired.
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Press STO to save the desired FREQ.
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Term
| 3 levels of security classification: |
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Definition
Top Secret: information whose unauthorized disclosure could reasonably be expected to cause exceptionally grave danger to the national security
Secret: information whose unauthorized disclosure could reasonably be expected to cause serious damage to the national security
Confidential: information whose unauthorized disclosure could reasonably be expected to cause damage to the national security
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