User Manual

120 20191-002 Paragon-III Technical Manual
11
3. Operating Description
3.1 Radio Assembly
The Radio assembly component of each Paragon product is made up of high performance synthesized
radio base station designed for single operation. The Radio Assembly’s modules are commonly
installed in a standard, 19-inch wide rack frame.
The complement of modules is identical for Series II 762-764MHz or 767-773 MHz models:
• 2 x Receivers
• 1 x 5W Transmitter (Exciter in 50W model)
• 1 x BDLC-III (controller-modem)
• 1 x Optional 50 Watts Power Amplifier (future availability)
• 1 x Speaker panel
• 1 x Dual Power Supply
3.1.1 Receiver module
The RX1 and RX2 receivers’ use identical front panel controls and
indicators. These are:
• Gating Sensitivity - sets the RF signal level required to open the
mute gate and allow audio to pass to the speaker
1
.
• Gate LED - indicates the status of the mute circuit. It is lit when
a signal above the mute threshold is received1.
• Supply LED - is lit when DC power is applied. Fast Flashes
when linked with PGM800Win. Slow Flashes indicates VCO
(synthesizer) out of lock. Unequal Flashes indicates internal
communication error.
• Line Level - Not used
• Monitor Volume - The audio output delivers up to 1 watt to the
speaker. Always set volume knob to minimum when not in use
to reduce current consumption.
• Monitor Mute Switch - opens the mute, allowing continuous
monitoring of the audio signal. On = audio muted
F
igure 6 - Receiver module
1
“Gating Sensitivity” and “Gate LED” are not functionally used except to allow listening to incoming receptions
as a trouble-shooting aid.
Depending on the sensitivity adjustment, the Gate LED lights and a relay can be heard on incoming RF signals.
Gating
Sensitivity
Gate
LED
Line
Level
Monitor
Volume
Monitor
Mute
On - Off
Receiver
®
Gating
Gate
Line
Level
Supply
Sensitivity
Monitor
Volume
Off
On
Monitor
Mute