Safran CORTEX CRT Quantum - Carrier off and Idle Pattern; Carrier on and 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
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Page 146
3.5.10.3.Carrier OFF and Idle pattern
When Carrier is OFF and an Idle pattern has been defined (Idle length is not 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
TC Request
S/C
SendSCF
S/C + Preamble
S/C + CLTU
Idle
ON
TC Ack
Carrier OFF
RF Set
Time
TC Request
Preamble length
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.
3.5.10.4.Carrier ON and Idle pattern
When Carrier is ON and an Idle pattern has been defined (Idle length is not 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
S/C + Preamble
S/C + CLTU
Idle
ON
TC Ack
TC Request
S/C + CLTU
TC process
Preamble length