FSG 90 System
2 General Description
December 2014 FAV_D10024 5
2.4 Brief Description
The two radios out of the FSG 90 System are miniaturized, lightweight, panel mounted
single block VHF/AM transceivers operating in the airband frequency range
118.000 MHz ... 136.975 MHz. They provide either 2,278 channels with 8.33 kHz/25 kHz
channel spacing, plus 760 channels with '25 kHz only' channel spacing, covering a
standard communications distance of 100 NM (nautical miles) at FL 70.
Case dimensions of all models will fit into a standard 2¼ in. / 58 mm diameter opening of
the instrument panel or console (behind panel installation), using four (4) screws. Depth
including wiring is 230 mm.
All control and display elements are located on the front panel. Connections to the
electrical environment are made through a 25-pole D-SUB connector and a BNC female
connector at the rear panel of the units.
The ICAO channel name (8.33 kHz/25 kHz spacing) and operating frequency (25 kHz
spacing), supply indicator, transmit indicator, channel memory number and SET-UP
information are all indicated at a two-line Liquid Crystal Display (LCD, can be back-lit).
Three operating/display modes are user selectable:
Use/STBY Mode: Active channel name or frequency, selectable standby channel
name / frequency
Channel Mode: Active channel name or frequency, associated pre-set channel
memory number (1 … 99)
Direct Tune Mode: Active channel name or frequency only.
With the Dual Mode models FSG 90(X) up to 99 channel memories in 8.33 kHz / 25 kHz
CH spacing (6-digit display), and another set of up to 99 channels in the '25 kHz only'
CH spacing (5-digit display) can be pre-set. After change to the other operating mode
(from 8.33/25 kHz to 25 kHz only, or from 25 kHz to 8.33/25 kHz), each stored set of up
to 99 channel memories remains available.
Preset channel memories remain available also after manual or automatic power-off.
The non-volatile channel memories of all FSG 90(X) can easily reprogrammed also
during flight or ground operation.
Programming can be done in the actual mode. Deleting channel memories is possible in
each mode (only during SET-UP mode).
For ground applications, limitation to use pre-set channel(s) only can be determined in
(password protected) SET-UP.
Channel name / frequency, or pre-set channel memories are selected with the dual
function F/CH switch.
Both Transmit and Receive use the same digital frequency synthesizer and one
temperature calibrated reference crystal (accuracy 1 ppm in the temperature range from
0°C to +40°C/32°F to 104°F).
The dual superhet receiver offers very high immunity against in-band and out-of-band
interference and intermodulation (Annex 10 FM immunity).
To Next Page
Loading...
