Safran CORTEX CRT Quantum - Carrier and Modulation Sequencing; Carrier OFF, no Idle Pattern; Carrier ON, no Idle Pattern

COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
Ref. DTU 100042
Is.Rev. 5.17
Date: Dec.
03, 2021Sept. 30, 2021
© Safran Data Systems
This document is the property of Safran Data Systems.
It cannot be duplicated or distributed without expressed written consent.
Page 145
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.
Carrier OFF
TC process
RF Set
Time
Carrier ON
RF Fall
Time
0,02 sec
TC Request
S/C
SendSCF
TC Ack
Carrier OFF
RF Set
Time
1 sec
TC Request
Preamble length
S/C + Preamble
bits)
S/C + CLTU
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 Request
S/C
SendSCF
SC + Preamble
SC + CLTU
TC Ack
TC Request
S/C
SendSCF
TC process
Preamble
length