Thales NSS 100S-1 Component Maintenance Manual With Illustrated Parts List page 27

E. Input/output information
(1) Radiofrequency input
- Mnemonic: RF
- Frequency:
. L1 = 1575.42 MHz,
. L2 = 1227.60 MHz(optional processing).
- Type of modulation: BPSK (binary phase shift keying),
- Modulation code:
. C/A (coarse acquisition),
. P (precise code): optional processing.
- Parameters transmitted:
. Satellite identification code: pseudo random code (gold code),
. Navigation data
(2) ARINC Inputs/outputs
(a) Input no. 1
(b) Input no. 2 (optional)
© THALES AVIONICS
COPYRIGHT SEXTANT Avionique 1995
c
The document reference is online, please check the correspondence between the online documentation and the printed version.
COMPONENT MAINTENANCE MANUAL
transmitted on 1023 bits at a speed of 1.023 Mb/s
* 1500-bit message,
* Transmission speed: 50 bits/second,
* Parameters transmitted: GPS system time, time correction
parameters, ionosphere delay model parameters, ephemerides: all
parameters that precisely define the orbit of received satellites.
- Mnemonic: A.REC.1L/A.REC.1H,
- Type: ARINC 429 LS (12.5 kHz),
- Functions:
. RPU initialization (latitude, longitude, altitude, time and
date),
. RPU programming, in special configurations (satellite
deselection, preferential choice of position-fixing mode),
. Reception using pressure altitude or pressure-inertia altitude
used in 2D+T mode (use of 3 satellites),
. Reception of speed aids (true air speed, true heading, magnetic
heading and altitude rate), for modes that require an aid.
- Mnemonic: A.REC.2L/A.REC.2H
C17004
34-57-96
Page 5
OCT 15/01