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Motorola APX 2000 Detailed Service Manual

Motorola APX 2000
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Theory of Operation: Main Board 3-5
Figure 3-4. Transceiver (UHF1/UHF2) Block Diagram (Power and Control Omitted)
FGU
Transmitter
Receiver
2nd
LO
Digital
RF Atten
Antenna Switch
coupler
Rev
Power
Detector
Log
Amp
FET
TRIDENT IC
LOOP
FILTER
PRESCALAR
BUFFER
RX SSI Data
16.8MHz
BUFFER
PRE
BUFFER
TX LO
TX
BUFFER
TX
RX
*
16.8MHz
RX SSI Clock
RX SSI Frame Sync
Indicates Sub-shield
Harmonic
Filter
Driver
Amplifier
*
Abacus
IF Filter
15dB Step Attn
RX VCO
TX VCO
UHF1
LNA
UHF1
Mixer
GPS

Table of Contents

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Motorola APX 2000 Specifications

General IconGeneral
IP RatingIP67
Operating Temperature-30°C to +60°C
GPSOptional
BluetoothNo
Frequency Range700/800 MHz
Power Output1-5 W (VHF), 1-3 W (700/800 MHz)
ChannelsUp to 1, 000
Battery LifeUp to 10 hours (digital)
Digital ProtocolAPCO P25
FrequencyVHF: 136-174 MHz, UHF: 380-470 MHz, 700/800 MHz: 764-870 MHz
Power1-3W (700/800 MHz), 1-5W (VHF)

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