Index-2
RF paths
Receive path, 7-7
Specifications, 7-6
Audio/Filter board
Block diagram, 3-1
Circuit description
, 3-1
ALC circuit
, 3-6
CW hold timer and gate, 3-7
Low power switch, 3-6
Sidetone switch, 3-6
Control circuitry
Contrast control, 3-7
Function decoder, 3-7
T/R switching, 3-7
CW circuit
CW oscillator, 3-6
Receive path
Audio amplifier 600 ohm, 3-5
Audio amplifier handset/speaker,
3-5
High-pass filters, 3-4
Low-pass filters, 3-4
Off-board receive path, 3-4
Product detector, 3-4
Squelch circuit, 3-4
Squelch gates, 3-5
Transmit path
Accessory connector audio input,
3-2
Balanced modulator, 3-2
Low-pass filters
, 3-3
Off-board transmit path
, 3-3
Relay drivers and decoders
, 3-3
VOGAD, 3-2
Component locations, schematics and
parts list
, 3-13
Component locations diagram
(738221)
, 3-14
Parts list (009-00101)
, 3-19
Schematic diagram (994172)
, 3-15
Connector pin assignments
, 3-9
J1 connector
, 3-9
J2 connector, 3-10
J3 connector
, 3-10
J4 connector
, 3-11
J5 connector, 3-12
J6 connector
, 3-12
J7 to J12 coax connectors, 3-13
Specifications, 3-8
B
BITE, 1-3
see also BITE screen
Block diagrams
1650 kHz IF board, 4-1
ALE option board, 13-1
Antenna Tuner board, 7-3
Audio/Filter board, 3-1
Frequency conversion diagram, 2-2
Mixer board, 5-1
Power Amplifier board, 6-1
PRC1099A system diagram, 2-14
PRC1099A wiring diagram, 2-15
Processor board, 9-2
Synthesizer board, 8-1
C
Channel
see also Channel setup screen
CW, 1-3
see also Modulation modes, CW mode
D
Display board
Circuit description, 10-1
Backlight generator
, 10-1
Display, 10-1
Jumpers
, 10-2
Component locations, schematics, and
parts list
, 10-7
Component locations diagram
(738220)
, 10-8
Parts list (009-10801)
, 10-11
Schematic diagram (994165), 10-9
Connector pin assignments
J1 connector, 10-2
J2 connector
, 10-4
J3 connector
, 10-5, 10-6
F
Frequency conversion, 2-1
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