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Frequency Programming
3.6.2.
For the ESA, INMARSAT and LMCO tone standards, the tone frequencies are fixed. For all other standards, the
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COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
Ranging request
received on port RNG ?
YES
Request accepted
YES
Return positive
primary acknowledgement
message on port RNG
Tables computation
successful ?
YES
Tone transmission/reception
Phase measurement
Ranging sequence
successful ?
YES
Process & time-tag
measurements.
Decrement sequence counter
Return transaction message
on port MEAS
Sequence counter = 0 ?
NO
YES
Return positive
secondary acknowledgement
message on port RNG
Figure 76: Ranging Sequence Flow Chart
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NO
Return negative
bad syntax or
NO
primary acknowledgement
bad configuration
message on port RNG
Return negative
NO
secondary acknowledgement
message on port RNG
Return negative
NO
secondary acknowledgement
open loop, H/W failure...
message on port RNG
NO
Continuous mode
requested ?
Major tone alone
Phase measurement
Return transaction
message on port MEAS
YES
Stop Ranging command
Safran Data Systems
.
Ref.
DTU 100042
Is.Rev.
5.17
Date:
Dec.
03, 2021Sept. 30, 2021
YES
Range update
Time-tagging
NO
received ?
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