Safran CORTEX CRT Quantum, Руководство пользователя

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COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
Ref. DTU 100042
Is.Rev. 5.17
Date: Dec. 03, 2021Sept.
30, 2021
© Safran Data Systems
This document is the property of Safran Data Systems .
It cannot be duplicated or distributed without expressed written consent.
Page 27
1.6.2.
IF Modulation

Number of IF Modulator boards 1 or 2 (IFM-1, IFM-2)

Modulation FM, PM, BPSK, QPSK, OQPSK, AQPSK, 8PSK

Carrier frequency (CRT XL Quantum)
60.0 to 78.0 MHz

Carrier frequency (CRT eXplorer)
60.0 to 78.0 MHz (226 to 234 MHz as option)

Carrier frequency resolution 14 pHz (250 MHz / 264)

IF output bandwidth 50-90 MHz (- 3 dB bandwidth)

Modulating signal Internal and external analog video signals (base band)
Internal or external PCM data streams

External analog input 2 Vpp / 50
Ω

PCM modulation filtering None, Raised or Root Raised & roll-off factor

Frequency deviation 0 to ± 5 MHz

Modulation index 0 to 2.5 radians

IF output ports (per IFM) 2 (Nominal & Test)

Output level Nominal output : 0 to - 80 dBm
Alternate output : - 20 dBm

Output level setting accuracy
≤ ± 1 dBm (Nominal port, from 0 to -50 dBm, at 70 MHz)

Output impedance / VSWR 50
Ω / ≤ 1.30

Carrier frequency stability As per the reference clock (internal or external)

Unwanted emissions
≤ - 60 dBc, from 0 to -20 dBm output level

IF phase noise (CRT XL Quantum)
-43.5 dBc/Hz at 10 Hz, falling to -120 dBc/Hz at 1 MHz
≤ 0.5° RMS in 1-MHz bandwidth (0.2° typical)

IF phase noise (CRT eXplorer)
-70 dBc/Hz at 10 Hz, falling linearly to -120 dBc/Hz at 1 MHz
≤ 0.5° RMS in 1-MHz bandwidth (0.2° typical)

Carrier sweep range ± 1 to ± 1,000 kHz

Carrier sweep rate 1 Hz/s to 175 kHz/s

Carrier sweep offset 0 to 1 MHz (signed)

Sweep step NCO refreshed every microsecond