Installation Manual

THALES COMMUNICATIONS
OIM
AHV1600-SYSTEM
Page 201
July 16/09
INSTALLATION
1. GENERAL CONDITIONS
A. POWER SUPPLY
A nominal voltage of 28 Vdc powers the equipment.
It can nevertheless operate within a DC power supply range of 22 V to 30.3 V.
The absorbed power at 28 V is less than 20 W. It is typically 18 W.
The primary power supply circuit is isolated from the secondary circuit.
B. LOCATION
When selecting a location for equipment and working out the details for installation in the platform,
the objectives should be easy implementation and replacement of the equipment and radar altime-
ter as close as possible from the antennae.
C. WATER, SAND, AND DUST TIGHTNESS
Although the equipment is designed to withstand salt spray and a high degree of humidity, it is not
waterproof and precautions should be taken to protect it against trickling or sprayed water (accord-
ing to its specifications).
D. MOUNTING
The AHV1600 Transceiver is fixed on the platform by means of four M6 screws, without any pre-
ferred orientation.
E. INSTALLATION CONDITIONS
The AHV1600 Radar altimeter normal installation conditions are described hereafter:
 Radio Frequency (RF) isolation between the transmission and reception antennae > 75 dB.
 Adaptation of each antenna 50 ohms, over the frequency range (4.2 GHz to 4.4 GHz).

Gain of each antenna at least 7 dBi and 11 dBi maximum, over the frequency range 4.2 GHz to
4.4 GHz.
 Aperture angles of the antennae are at - 3 dB (with ANT-140A):

in pitch ± 25° ± 2.5°.

in roll ± 30° ± 3.5°.