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Other programming Parameters
3.6.4.
The following parameters are remotely programmable by commands received on the Control port:
3.6.4.1. Number of Measurements & Sequences
The number of measurements on the major and minor tones is programmable between 0 and 999. The number
of measurements programmed on the minor tones is not significant for the ESA tone, ESA-like, and USB
standards
The ranging sequence can be automatically repeated up to 32 times (one ranging transaction response message
sent over the LAN at the end of each sequence).
3.6.4.2. Tone Validation and Tone Sequence (ESA-like and USB tone
Standards)
The tone sequence is fully programmable. To each tone is allocated a number from 0 to 7 for ESA-like, to 9 for
USB. 0 indicates that the tone is not transmitted. Any other value indicates that the tone is transmitted; the value
gives the tone rank in the ranging sequence (1: tone transmitted first).
In Hybrid Ranging, the tones are imposed by the satellite configuration and are always emitted when a TC SQPN
link is established and ranging tones are enabled. The satellite tone configuration can be programmed as integer
ratios (up to 8) tone/epoch rate.
3.6.4.3. Measurement Sampling
It is possible to sample the measurements and transmit only one measurement out of N to the Ranging Client, N
being any integer value from 1 (transmit all measurements) to 100 (transmit 1% of the measurements). The total
duration of the ranging sequence will change accordingly since the number of measurements transmitted to
Ranging Client will in any case be equal to the programmed number of measurements.
The first result transmitted to the Ranging Client corresponds to the first measurement performed on the major
tone (ESA, ESA-like, Hybrid Ranging and USB standards) or on the first transmitted tone (INMARSAT and
LMCO standards).
3.6.4.4. Integration Time
The duration of the correlation process (« Integration time ») on each minor tone or PN code is programmable
between 250 ms to 2500 ms in 250-ms steps.
This parameter should only be programmed for the ESA, ESA-like and USB standards.
© Safran Data Systems
COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
This document is the property of
It cannot be duplicated or distributed without expressed written consent.
Safran Data Systems
.
Ref.
DTU 100042
Is.Rev.
5.17
Date:
Dec.
03, 2021Sept. 30, 2021
Page 165
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