()
Table
of
Contents
Page
Chapter
1
General Description
1-1
Specifications BTR-200
1-1
Controls and Connections 1-2
FrontPanel 1-2
RearPanel 1-5
Chapter
2 - Identification
of
Circuit
Board
Revision
and
Version
Audio Boards......•.................................................................................................................................... 2-1
Receive Board 2-2
TransmitBoard 2-3
Chapter
3 - Transmit, Receive &Audio Circuit Boards
BTR-200Instrument Disassembly 3-1
TransmitBoard 3-2
CircuitDescdption 3-2
AlignmentProcedure :3-2
Voltage Tables -TransmitBoard (878521) 3-3
PCB TransmitAssembly (878521-*)(palts List) ;3-7
Receive Board 3-9
Circuit Descdption (PCB 70714000) 3-9
CircuitDescdption (PCB 750309)) 3-9
AlignmentProcedure 3-10
Receive Board (70714000) 3-10
EquipmentRequired 3-10
Receive Board (750309) 3-11
EquipmentRequired 3-11
Voltage Tables -Receive Board (70714000) 3-14
Voltage Tables -Receive Board (750309) 3-15
PCB Receive Assembly 878522* (Parts List) 3-21
PCB Receive Assembly 878662* (Parts List) 3-24
Audio Board ,
::
3-27
Audio Board CircuitDescription 3-27
Receive Expanders 3-27
MicrophoneAmplifier 3-27
AuxiliaryInput Amplifier 3-27
Intercom Driver 3-27
Intercom Input. 3-28
Headset and SpeakerAmplifiers 3-28
Transmit'Mixer and Filter 3-28
Auxiliary Output· 3-28
RemoteTransmit Circuit 3-28
Power
Supply 3-28
Alignment Procedure 3-29
EquipmentRequired 3-29
-i-