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.
major and minor tone frequencies are fully programmable:
3.6.2.1. Major Tone Frequency
The major tone frequency is programmed according to the following rule (in kHz):
with the following restrictions:
(else, the configuration command is rejected).
(else, the configuration command is rejected).
(else, the ranging requests are rejected).
depending on factory settings (refer to Annex 5),
(tone and
ESA code standards).
3.6.2.2. Minor Tone Frequencies (ESA-like and USB Tone Standards)
The minor tone frequencies are programmed according to the following rule (in kHz):
with the following restrictions:
(800 000 for USB Tone Standard).
.
(else, the ranging requests are rejected).
In ESA-like and USB standards, the ratio between Q factors of two minor tones can be a non-integer
value (see note below) but the Q factor for any minor tone must be a multiple of
.
(ESA-like and USB standard).
(RAU output filter bandwidth).
IMPORTANT NOTE (TONE STANDARDS):
USING NON-INTEGER RATIOS BETWEEN MINOR TONE « Q » FACTORS ALLOWS TO INCREASE THE AMBIGUITY
DISTANCE MUCH BEYOND THE WAVELENGTH OF THE LOWEST VIRTUAL MINOR TONE.
IN THIS CASE, THE « FIXED SEQUENCE » OR « NO FIXED » OPERATING MODE MUST BE SELECTED
TO AVOID FALSE AMBIGUITY SOLVING (SEE SECTION 3.6.4.7, SCENARIOS 2 & 4).
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