Chapter 4

LOADING SINCGARS FH DATA (LOCAL FILL)

To frequency hop, SINCGARS must be loaded with specific FH data such as the transmission security key (TSK). This data is loaded from an ECCM Device, MX- 10579 and should be loaded after the radio set is powered up. See Figure 4-12. The instructions for filling the RT are as follows--

Ensure the ECCM fill device is loaded.
Set ECCM fill device function switch to OFF.
Connect ECCM fill device to RT connector AUD/FILL using fill cable.
Set RT FCTN to LD-V.
Set RT MODE to FH.
Set RT CHAN to MAN.
Set ECCM fill device select switch to T1 or T2.
Set ECCM fill device function switch to ON.
Press HOLD. Display will show "LOAD," then "STOP." A beep is heard, the "COLD" is displayed.
Set RT FCTN to LD.
Set ECCM fill device function to OFF.
Disconnect ECCM fill device from RT connector fill.

NOTE: TSK is transparent with ICOM SINCGARS and built as a part of hopset. Non-ICOM SINCGARS requires separate identified TSK. There is no "LD-V" on the ICOM version.

Figure 4-12. Loading FH data fill.

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LOADING SINCGARS FH DATA (LOCAL FILL)