Low Bandwidth Scenario - Safran CORTEX CRT Quantum User Manual

3.4.1.1. Low Bandwidth Scenario

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TMS data
PCM
encoding
TCU data
PCM
encoding
RNG sequence
© Safran Data Systems
COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
The uplink IF carrier is modulated by any combination of low bandwidth base band signals
(TCU, TMS, RAU or external analog video input).
Signal bandwidth is limited to 125, 250 or 500 kHz (factory setting).
IF modulation is limited to PM and FM.
Sub-carrier generation can be by-passed on the TMS.
The base band video signals can be monitored if the uplink Video Test points (VIDEO 1 or
2, Sts Out/J25 to J28) are enabled (see section Annex 5).
IFM factory setting: Video only or Video + PCM.
Sub-carrier
modulation
Base-band
modulation
Base-band
generation
Modulation
index
Figure 51: Low Bandwidth Uplink Scenario
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Modulation
index
Video
Input
Interpolation
Safran Data Systems
.
Ref. DTU 100042
Is.Rev. 5.17
Date: Dec.
03, 2021Sept. 30, 2021
PM, FM IF
modulation filtering
(Option)
Noise
IF
outputs
(Option)
Page 112