QD580 Master
Chassis and Modules
The master chassis is supplied as a complete assembly and
contains the power supply, encoder and monitor modules with
all their relevant connections in the outer case.
This master chassis is then ready to accept the receiver
modules of your choice, and if necessary the blank panels.
A modular concept unit 450mmW x 182mmH x 400mmD housing the
power supply, encoder and monitor modules. Receiver modules
are ordered as required. The unit is finished in light and
dark grey with the module fronts of anodised aluminium.
QD582 Dual
Encoder
Used to replace the original encoder in the QD380 DSS
Master Rack Assembly and provide two data outputs for
DSS systems and two data outputs for DCS systems.
Monitor Module
Each individual channel may be monitored by the channel
select push button and indicator. A frequency
meter shows the station that each receiver is
tuned to; a level indicator allows accurate tuning
and a stethophone driver enables audio quality
checks to be made.
Power Supply
Module
Includes On/Off switch and supply indicators. Provides
isolation from the mains and +5, +18, +30V dc supplies
regulated and protected for the unit.
Encoder Module
Housing the system clock analogue to digital converters
and data cable driver, this unit can encode the
audio from up to eight receiver modules (16 programmes).
QD381 FM
Module
Contains two individual FM radio receivers which cover
the 87.5 to 108Mhz frequency band. Each has an AFC
push button and a screwdriver tuning control.
QD382 AM
Module
Contains two individual AM receivers which cover the
525 to 1605 Khz frequency band. Each has a screwdriver
tuning control.
QD383 MW/LW
Radio Module
Contains two radio receivers, one for the AM ’medium
wave’ frequency band 525 to 169Khz, one for the ‘long
wave’ frequency band 148 to 284Khz. Each receiver
has a screwdriver tuning control.
QD384 TV
Module
Contains two individual TV sound receivers which cover
the UHF channels 21 to 68. Each has an AFC push button
and a screwdriver tuning control.
QD385 Auxiliary
Microphone Input Module
Contains an auxiliary input for use with external audio
source such as a tape recorder, and a microphone input
for use with a low impedance microphone. Both have
level controls.
QD395 Repeater
Unit
Required for sound system main or secondary wiring
runs in excess of 300m. The repeater unit regenerates
the digital signals to allow a further 300m wiring
run. Box surface: 8391/B.
QD386 Blank
Front Panel
Blanking plate.
QD509 Loudspeaker
Control Unit
For use with remote loudspeaker (not supplied) in areas such
as dayrooms. Front cover plate 174mm x 174mm. Control switches
on membrane panel.
Standby On/Off; Programme Select Up/Down; Volume Up/Down.
LED display for indicating programme selected. QD509 will
decode up to 16 programmes.
Amplifier output 1W into one 8ohm loudspeaker.
The interface connecting PCB is as detailed for QD501 Bedhead
Unit, including the provision for fitting a sounder PCB (QD559).
Data cable ring item. Box flush 8406/B.
