Operating instructions

Page 18 RF Technology R50
7.2 Physical Configuration
The receiver is designed to fit in a 19 inch rack mounted sub-frame. The installed
height is 4 RU (178 mm) and the depth is 350 mm. The receiver is 63.5 mm or
two Eclipse modules wide.
7.3 Front Panel Controls, Indicators, and Test Points
7.3.1 Controls
Mute Defeat Switch - Toggle
(Overrides CTCSS and carrier squelch at the monitor output)
Monitor Speaker volume - Knob
Line output Level - screw driver adjust multi-turn pot
Noise Squelch setting - screw driver adjust multi-turn pot
Carrier Squelch Setting - screw driver adjust multi-turn pot
7.3.2 Indicators
Power ON - Green LED
Squelch Open - Yellow LED
Fault Indicator - Flashing Red LED
7.3.3 Test Points
There are no front panel test points. All important test points are monitored by the
firmware.
7.4 Electrical Specifications
7.4.1 Power Requirements
Operating Voltage - 16 to 32 Vdc
Current Drain - 0.5A Maximum
Polarity - Negative Ground
7.4.2 Frequency Range and Channel Spacing
The R50, as a single model, covers the frequency range 25MHz to 50MHz in one
model. All frequencies, that are an integer multiple of 1250Hz, are allowed
within this band.
The R50, by default, has a 3
rd
IF filter whose bandwidth is suitable for 20kHz or
25kHz channel spacings.
The R50 can, optionally, be supplied with a filter which is suitable for 10.0 or
12.5kHz, or 15kHz channel spacing. Similarly, a third filter is also available
which is suitable for 5.0, 6.25kHz, or 7.5kHz.
7.4.3 Frequency Synthesizer Step Size
The specified frequency can be any multiple of 1250Hz.