06.03.2013 Views

a 2003 document whose - Institute for Simulation and Training ...

a 2003 document whose - Institute for Simulation and Training ...

a 2003 document whose - Institute for Simulation and Training ...

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

552<br />

Section 9<br />

Radio Communications family<br />

b) Hop Set ID - This field shall identify the set of frequencies used when creating a<br />

hopping pattern. The frequencies in the hop set are transmitted by a method outside<br />

the scope of this st<strong>and</strong>ard.<br />

c) Lockout Set ID - This field shall identify the set of frequencies that are excluded from<br />

the hopping pattern. The frequencies in the lockout set are transmitted by a method<br />

outside the scope of this st<strong>and</strong>ard.<br />

d) Transmission Security Key - This field shall identify the transmission security key that<br />

is used when generating the hopping pattern. (Not currently implemented, field added<br />

<strong>for</strong> future use).<br />

e) FH Synchronization Time Offset - This field shall identify the offset to exercise time in<br />

seconds <strong>for</strong> the clock in the SINCGARS radio. SINCGARS radio clock must be<br />

synchronized <strong>for</strong> the radios to communicate. (Not currently implemented, field added<br />

<strong>for</strong> future use).<br />

2. Start of Message - This field shall specify whether the radio is starting or continuing a<br />

transmission. A SINCGARS radio shall not receive any part of an FH transmission if the<br />

Start of Message is missed. Start of message may be missed if the radio was transmitting,<br />

receiving a different radio or otherwise not ready to start receiving a transmission.<br />

3. Clear Channel - This field shall specify that the transmission is not subject to propagation<br />

loss, interference, comsec or any other <strong>for</strong>m of signal degradation. Clear channels are<br />

used <strong>for</strong> interoperability with older systems <strong>and</strong> <strong>for</strong> control purposes.<br />

9.1.7.1.1 Start of Message<br />

FH Net ID 16-bit unsigned integer<br />

Hop Set ID 16-bit unsigned integer<br />

Lockout Set ID 16-bit unsigned integer<br />

Start of Message 8-bit enumeration<br />

Reserved 8-bit<br />

FH Synchronization Time Offset 32-bit signed integer<br />

Transmission Security Key 16-bit unsigned integer<br />

Clear Channel 8-bit unsigned integer<br />

This section specifies the 8-bit enumeration <strong>for</strong> the Start of Message field in the CCTT SINCGARS<br />

Modulation Parameters.<br />

Field Value Enumeration<br />

0 Not start of message<br />

1 Start of Message

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!