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3.5.10. Carrier and Modulation Sequencing
The sequencing of carrier activation and modulation depends upon the setups at the time when a TC request is
received.
3.5.10.1.Carrier OFF, no Idle pattern
When Carrier is OFF and Idle length is 0 at the time a TC request is received, the following sequence will be met.
RF Set
Time
Carrier OFF
TC process
TC Request
If the parameter "RF Fall Time" is set to 0, the carrier will not be returned to OFF at completion of the CLTU and
consequently subsequent TC requests will be processed as shown in 3.5.10.2.
3.5.10.2.Carrier ON, no Idle pattern
When Carrier is ON and Idle length is 0 at the time a TC request is received, the following sequence will be met.
Parameters "RF Set Time" and "RF Fall Time" have no impact.
Carrier ON
TC process
© Safran Data Systems
COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
S/C
S/C + Preamble
bits)
SendSCF
Preamble length
S/C
SC + Preamble
SendSCF
Preamble
length
TC Request
This document is the property of
It cannot be duplicated or distributed without expressed written consent.
Carrier ON
S/C + CLTU
SC + CLTU
TC Ack
Safran Data Systems
.
Ref.
DTU 100042
Is.Rev.
5.17
Date:
Dec.
03, 2021Sept. 30, 2021
RF Fall
Time
0,02 sec
Carrier OFF
TC Ack
TC Request
S/C
SendSCF
TC Request
RF Set
Time
1 sec
Page 145
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