Motorola ASTRO XTS 5000 I - Front End Filter Alignment; Definition; Procedure for 700 MHz Frequencies; Procedure for 800 MHz Frequencies

Basic Theory of Operation
6
Figure 1. XTS 5000 Overall Block Diagram
Analog Mode of
Operation
Receiving When the radio is receiving (see Figure 2.), the signal comes from the
antenna connector to the Transceiver board, passing through the
antenna switch and the receiver front end. The signal is then filtered,
amplified, and mixed with the first local-oscillator signal, generated by
the voltage-controlled oscillator (VCO).
Figure 2. Receiver Block Diagram
Universal
Flex
External
Accessory
Connector
(Side Connector,
Controls, LEDs,
Speaker,
Microphone)
Note:
indicates 26
wires
VOCON
Board
Transceiver
Board
Encryption
Module
(Optional)
7.5V
Battery
Keypad
Antenna
Display
3
26
40
22
26
22
40
13
J301
J107
J701
J101
P1
J1 P101
P201 J2
J3
RF Input
RX Front End
Harmonic
Filter
ADC
LO
CKO
RX_SSI_ DATA
to VOCON Board
XTAL
Filter
ABACUS III - RX Back End
Antenna
Switch
Tuneable
Preslector
RF
Amp
Tuneable
Preselector
Filter
1st
Mixer
1st LO
3
LNA