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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It cannot be duplicated or distributed without expressed written consent.
3.5.11. Progressive modulation index
This feature is available for SPS version E4R32 and higher.
When activated, this feature allows the modulation amplitude (index in PM mode, deviation in FM mode) to be
gradually increased from zero to the requested value, instead of instantly raised from zero to the requested
value.
The modulation increases in 6 steps of 65.536 ms each, resulting in a total time of 393.216 ms to raise from zero
to the nominal amplitude.
The modulation increase follows a geometric law with a ratio of 2 between two steps.
The progressive modulation index feature, when activated, applies to the TCU and RAU signal.
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