Field Communication Fundamentals

Question 1

What are the two modes of operation for the Single Channel Ground and Airborne Radio System (SINCGARS)?

Answer 1

SINGLE CHANNEL- The Receiver-Transmitter(RT) communicates on one frequency

FREQUENCY HOPPING- It reduces or eliminates the threat of jamming and direction-finding equipment. To use FH mode, RT must be loaded with FH data.
Data input required for FH is:
-Cold start transmission security key(TSK)
-SC frequency loaded in MAN channel
-Hopset
-lockout set,if required
-FH sync time

Question 2

What are the max transmission ranges for LO, M, HI, PA

Answer 2

LO-200 m- 400 m
M- 400 m- 5 km
HI- 5 km - 10 km
PA- Vehicular only, 10 km- 40 km

Question 3

What are the max transmission ranges for LO, M, HI, PA

Answer 3

LO-200 m- 400 m
M- 400 m- 5 km
HI- 5 km - 10 km
PA- Vehicular only, 10 km- 40 km

Question 4

What are the components of the SINCGARS radio?

Answer 4

Receiver-Transmitter(RT),Battery box, Antenna,Harness and accessory bag, headset or handset

Question 5

How many way to tie down an antenna are?

Answer 5

4 ways: Stay-down clamp, Snap-free clamp, Stay-down clip, Snap-free clip.

Question 6

How do you load frequencies in SC?

Answer 6

• Obtain frequency from SOI or NCS
• Set FCTN to LD
• Set MODE to SC
• Set CHAN to MAN, CUE, or desired channel where frequency is to be stored.
• Press FREQ
• Press CLR(display will show 5 lines)
• Enter the new frequency
• Press STO
• Repeat the steps above if inputing more frequencies
• Set FCTN to SQ ON

Question 7

What is the purpose of the following batteries? BA5372, BA5590, BA590

Answer 7

BA5372-Non-rechargeable (hold-up battery)
BA5590- Non-rechargeable (Lithium) Manpack radio primary battery.
BA590- Rechargeable- radio secondary power battery.

Question 8

What are the procedures to perform maintenance on the AN/PRC?

Answer 8

INSPECT THE EQUIPMENT
CLEAN THE EQUIPMENT
PERFORM OPERATION CHECKS