Motorola Astro Digital Mobile Radio Xtl5000 Detailled 6881096c74 B Manual

Chapter 1 Introduction
1.1 Notations Used in This Manual
Throughout the text in this publication, you will notice the use of warnings, cautions, and notes. 
These notations are used to emphasize that safety hazards exist, and care must be taken and 
observed.
NOTE:The Note notation indicates an operational procedure, practice, or condition that is essential 
to emphasize.
1.2 General
This manual includes all the information necessary to maintain peak product performance and 
maximum working time. This...

May 25, 20056881096C74-B
1-2Introduction: General
Included in other areas of this manual are functional block diagrams, detailed theory of operation, 
troubleshooting charts and waveforms, schematics, and parts list. You should be familiar with these 
sections to aid in deducing the problem circuit. Also included are component location diagrams to aid 
in locating individual circuit components, as well as IC diagrams, which identify some convenient 
probe points.
The Theory of Operation section of this...

Chapter 2 Product Overview
2.1 Introduction
The ASTRO Digital XTL 5000 radio is a dual-mode (trunked/conventional), microcontroller-based 
transceiver incorporating a Digital Signal Processor (DSP). The microcontroller handles the general 
radio control, monitors status, and processes commands input from the keypad or other user 
controls. The DSP processes the typical analog signals and generates the standard signaling 
digitally to provide compatibility with existing analog systems. In addition it...

May 25, 20056881096C74-B
2-2Product Overview: Control-Head Assembly
2.3 Control-Head Assembly
This section discusses the basic operation and components of each control-head assembly.
2.3.1 Display, Vacuum Fluorescent Display Driver, Vacuum Fluorescent Voltage 
Source, Controls and Indicators, Status LEDs and Backlight LEDs
For information on the above, please refer to: 
• W3 Control Head User’s Guide, 6881096C67 and 
• W4, W5, W7 and W9 Control Heads User’s Guide, 6881096C68.
2.3.2 Vehicle Interface...

6881096C74-BMay 25, 2005
Product Overview: Control-Head Assembly2-3
Figure 2-2.  VIP Remote-Mount Configuration
Figure 2-3.  VIP Remote-Mount Pin-Outs (Male)
Control
HeadMain Board
(Radio)
U1
MC68HC
MAEPF-27922-O
Microprocessor SIOICSB9600 data
lines toggle
VIP-OUT
hadware
inside the
Control Head
VIP OUT 1
VIP OUT 2
1           2          3          4           5                       7          8                      10        11         12        13         14        15         16         17
18...

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2-4Product Overview: Control-Head Assembly
2.3.2.3  Remote-Mount W3 Hand-Held Control Head Configuration
Because the W3 control head does not have an interface for VIPs on the control head itself, the radio 
and the W3 interconnect board must work together to provide VIP OUT at the back of the radio 
(Figure 2-4). The driving transistors (for the ON/OFF relay control) are located on the W3 
interconnect board. Therefore, the microprocessor on the main board uses one set of lines...

6881096C74-BMay 25, 2005
Product Overview: Control-Head Assembly2-5
Figure 2-5.  VIP Remote-Mount Plus DEK Configuration
Figure 2-6.  VIP Remote-Mount Plus DEK Pin-Outs (Male)
Kit HKN4273 contains:
- One DEK-to-DEK interface cable (A)
- One 24-pin DEK VIP connector (B)
- One 14-pin non-DEK VIP connector
- Forty cimping pins(A) DEK interface lines:
DATA IN
DATA OUT
STROBE
CLOCK When a DEK is added, the
radio VIPs move from J2
and from the back of the
control head to the back of
the DEK.
Main Board...

May 25, 20056881096C74-B
2-6Product Overview: Control-Head Assembly
2.3.2.5  VIP Output Connections:
There are three VIP outputs that are used for the W9 control head and two VIP outputs for the W3, 
W4, W5, and W7 control heads. The VIP outputs are normally at SWB+ levels and are driven low by 
logic within the control head for both the dash- and remote-mount configurations. Field programming 
of the radio can define the functions of these pins. The output transistors that drive the VIP outputs 
can...

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Product Overview: Control-Head Assembly2-7
2.3.2.7  DEK Interface With Radio: Remote-Mount (W4, W5, W7, W9)
A maximum of three DEKs can be daisy chained to a single mobile radio. DEKs are only used with 
the W4, W5, W7, and W9 control heads when they are remotely mounted on the radio. DEKs are not 
used with any dash-mount control heads, including W4, W5, W7, or W9. The W3 control head does 
not support DEK, except in a special siren cabling configuration where the DEK 6-pin...

May 25, 20056881096C74-B
2-8Product Overview: Receiver Section
2.4 Receiver Section
This section discusses the receiver section components and basic operation for each band.
2.4.1 VHF Band Radios
The VHF (136–174 MHz) receiver consists of a front-end and a back-end sections.
2.4.1.1  Front-End Section
The primary function of the receiver front-end is to optimize image rejection and selectivity while 
providing the first conversion. The front-end uses discreet filters and LNAs. The first filter reduces...