TMC Radio SRM9010 User manual

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TNM-M-E-0001 Issue 3
SRM 9000 Series
FM VHF/UHF Mobile
Radio Transceiver
SERVICE MANUAL
TNM-M-E-0001
ISSUE 3
November 2004
f

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TNM-M-E-0001 Issue 3
SRM9000 Series FM VHF/UHF Mobile Radio Transceiver TNM-M-E-0001 ~ Iss 3

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TNM-M-E-0001 Issue 3
Declaration
The performance figures quoted are subject to normal manufacturing and service tolerances. The right is
reserved to alter the equipment described in this manual in the light of future technical development.
Copyright
All rights reserved. No part of this publication may be reproduced in any form or by any means without the
prior permission of TMC Radio.
Errors and Omissions
The usefulness of this publication depends upon the accuracy and completeness of the information
contained within it. Whilst every endeavour has been made to eliminate any errors, some may still exist. It is
requested that any errors or omissions noted should be reported to:
TMC Radio Pty Ltd.
1270 Ferntree Gully Road
Scoresby Vic
3179 Australia
Ph: [phone] (Direct: -3914)
Fax: [phone]
Mob: [phone]
e-mail: [e-mail]

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TNM-M-E-0001 Issue 3
Document History
Issue Date Comments
1 February 2002 Initial issue
2 August 2002 Re-branded to TMC Radio.
3 November 2004 Rev 9 information
List of Associated Publications
Document No. Description Issue
TNM-I-E-0005 SRM9000 Series Installation Instructions 5
TNM-U-E-0012 SRM9020 Trunk Operating Instructions 2
TNM-U-E-0013 SRM9020 PMR Operating Instructions 2
TNM-U-E-0014 SRM9025 PMR Operating Instructions 2
TNM-U-E-0015 SRM9025 Trunk Operating Instructions 2
TNM-U-E-0003 SRM9030 PMR Operating Instructions 2
TNM-U-E-0004 SRM9030 Trunk Operating Instructions 2
TNM-U-E-0020 SRM9030 Brief User Guide 2
TNM-U-E-0042 SRM9010 Brief User Guide 2
TNM-U-E-0043 SRM9020 Brief User Guide 2
TNM-U-E-0044 SRM9025 Brief User Guide 2

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TNM-M-E-0001 Issue 3
Warnings and Cautions
Caution
During disassembly and assembly, refer to Torque Settings in Section 1.7
Caution
Preparing the radio for alignment will erase from the radio all customer PMR and Trunking
configuration data (channel, signalling information etc). The only data retained by the Alignment
Tool is the factory alignment data for the radio (DAC settings for TX power, front-end tuning etc).
WARNING
SRM9000 radio equipment is to be connected only to 12-volt negative earth systems. In vehicles
with a 24-volt supply, an approved 24V/12V converter must be used. The supply must not be
taken from a 12V tap on the battery.
WARNING
To avoid RF injury, do not touch the Antenna when the Transmitter is in use.
WARNING
Double-fused 12V Supply Leads, Antenna cables and Speaker wiring is to be routed as far away
as possible from gas or fuel lines or any electronic control device. The radio transceiver and
antenna are to be mounted as far away as possible from these devices and their cabling.
Equipment is to be installed, by a competent person, in accordance with the requirements of local
radio communications authorities and/or Health and Safety regulations.
Post installation checks should be performed to ensure that there is no effect on the operation of
the vehicle’s electronics.
WARNING
Do not operate your radio, without a handsfree kit, whilst driving a vehicle.
WARNING
Do not operate your radio in an explosive atmosphere. Obey the “Turn Off Two-way Radios”
signs where these are posted, e.g. on a petrol station forecourt.
WARNING
Compliance with RF Energy Exposure Standards: To minimise exposure to RF fields during
equipment service and repair, the antenna terminal of the SRM9000 radio should be connected to
a suitable non-radiating RF load when the transmitter is in use.

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GLOSSARY OF TERMS
A summary of common radio terms and some other terms used in this document, and their meanings, are
given below.
3RP Trunking Signalling Specification relating to trunked networks for shared use. Used
primarily for networks in France.
ADC Analogue to Digital Converter.
AFC Automatic Frequency Control.
AGC Automatic Gain Control.
Alarm A selcall sequence sent from a subscriber equipment to indicate an Emergency
situation.
When activated the radio will enter a repeating sequence consisting of an Alarm
Live Transmit Time and an Alarm Dead Receive Time.
Certain special conditions for the radio may also occur during the alarm - see
Conditions during Alarm.
A dedicated SFM (trunked system) that is sent by pressing the Alarm Key.
ANN Abbreviation for Algorithmic Network Numbering. This is the numbering system
where the numbers presented to the radio user can be mapped directly to the
MPT1327 PFIX/IDENTs and vice versa by use of a fixed algorithm in combination
with some other customisation parameters. See also FPP and MEP.
Auto Interrogate An Acknowledge identity sent as a response to an individual reset call.
Automatic Power Feature whereby the transmit power is automatically set to a level determined by
the level of the received signal. This is used to extend the battery life of a Portable.
Automatic Volume Feature whereby the background audio level is monitored and if this is found to be
noisy then the volume level is increased to compensate, allowing the user to hear
better.
Background Hunting The searching for an alternative and 'better' control channel whilst already on a
valid control channel.
BCAST MPT1327 broadcast message. Used to transmit information about the trunked
radio system to radio units.
Busy The state of a channel such that:
• For a non-signalling channel - if Busy this means that the carrier is above squelch.
• For a channel with CTCSS/DCS - if Busy this means a signal is being received with
either no CTCSS tone / DCS code or the correct CTCSS tone /DCS code.
• For a channel with Selcall - if Busy this means a closed channel where the signal is
above squelch.
A feature that equates to 'Do Not Disturb' such that the radio will reject all non-
emergency calls. This feature can be activated using the Busy key (if assigned) or
from a menu; it is reset to disabled at switch on.
C4FM Compatible 4-Level Frequency Modulation.
Call Back A request, sent by the dispatcher, to a unit requesting that the unit calls the
dispatcher back.
CCSC Control Channel System Codeword.

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Channel Spacing The distance (in Hz) between the defined frequency channels.
CHEKKER System Interface Specification for Trunked Networks in Germany.
CLIM Call Limit Time; time limit on calls made. Normally this is defined by the Call Time
Limit parameter but can by overridden by the TSC depending upon the setting of
TSCLIM.
CLIME Emergency Call Limit Timer.
Clipboard A temporary storage area in Windows used to store data in cut, copy and paste
operations.
Closed A state where transmit and receive are not allowed until a Selcall message to open
the channel has been received. A Closed Channel is one which defaults (when
selected or after timed reset) to its closed state. Contrast with Open. Normally a
Closed channel would have Selcall Mute and PTT Inhibit would be enabled.
CODEC COde (Analogue to Digital Converter) / DECode (Digital to Analogue Converter).
Community Repeater A communications set-up whereby different groups of radios can operate by using
only one base station. This is achieved by the use of CTCSS tone signalling such
that each group has a different CTCSS tone (encode and decode) and radios can
only communicate with other radios in their group. Only one group of radios can
use the base station at any one time.
Continuous A continuous control channel is one that is only used by one site. There are no
breaks in the transmission of signalling. Emergency Call Time Limit
Control Channel A channel used for the transmission of messages that enables the TSC to control
radios. Control channels may either Continuous or Timed Shared.
Control Channel Burst A feature that enables control channel burst transmissions on systems using time-
shared control channels. It is unavailable if the control channel acquisition type is
not 'Time Shared'. To make available: go to Control Channel Acquisition Type and
set to Time-shared.
CTCSS CTCSS stands for Continuous Tone Controlled Signalling System. A continuous
tone (lower than the audio range of the receiver) is modulated onto the carrier as
well as other signalling or voice traffic. Compare with DCS. Only receivers which
have been instructed to recognise the same CTCSS tone are able to receive the
transmissions, since the squelch of receivers looking for different CTCSS tones
prevents the audio from being heard. This provides a simple method of sending
messages to selected receivers only and allows several different networks to use
the same frequencies. CTCSS is also known as Tone Lock or Tone Squelch.
DAC Digital to Analogue Converter.
Dash (-) digits Digits known as 'No Tone' digits used in Selcall Identities.
DCS Digital Coded Squelch system is based on sending a continuous stream of binary
codewords using, low deviation, direct frequency shift keying. Only receivers which
have been instructed to recognise the same DCS sequence are able to open their
squelch and receive the associated speech transmissions. This provides a simple
method of sending messages to selected receivers only and allows several
different networks to use the same frequencies.
Decode Reception of signalling. Either Selcall where encoded tone frequencies are
decoded and identified as specific tones digits or CTCSS/DCS where tones are
analysed to see if the channel should be opened.
Demanded Demanded Registration; a procedure in which the TSC forces a single radio unit to
attempt registration immediately (providing the radio is not already attempting to
register).

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Disabled The 'False' state of a parameter. That indicates this parameter is not active.
Typically this state is represented by an unmarked check box. Compare with
Enabled.
DSP Digital Signal Processor.
DTMF Abbreviation of Dual Tone Multi-Frequency signalling. Used to dial into Telephone
networks using tone dialling.
Dual Watch A facility that enables the Radio to periodically monitor another channel for a signal
above squelch. Typically applications are checking an emergency channel whilst on
another channel.
Dynamic User Groups These groups use a temporary user Ident to group a number of units together who
would not normally make up a group. These groups are formed by the TSC
(contrast with User Defined Groups) sending a special message to units instructing
them to add a new group Ident to their list of groups. Up to 8 groups can be
defined. These temporary groups are lost at switch off unless 'Save Groups at
Switch Off' is enabled.
Economiser A process by which the Receiver is powered down whilst there is no received
signal. Periodically the receiver is powered up to check for such a signal. This is
used to extend the battery life of a Portable.
Enabled The 'True' state of a parameter. That indicates this parameter is active. Typically
this state is represented by a mark (either a tick or a cross) in a check box.
Compare with Disabled.
Encode Transmission of signalling. Either Selcall where selcall tone digits are encoded into
tone frequencies or CTCSS/DCS where tones modulated onto the channel's
carrier.
ETS European Technical Standard.
External Alert A facility for switching on various ancillary devices to meet customer's individual
requirements (e.g. car horn, flashing lamp etc.) when 'called'.
Only available on a mobile radio. To make available: go to Hardware Components,
Terminal Settings and set Product Type to a Mobile type.
Fallback A mode of operation that may be entered when the Network is suffering a
malfunction. During this mode certain facilities (e.g. PSTN) may not be available.
FFSK Fast Frequency Shift Keying. This is a signalling system for the transfer of digital
information. It works by using one of two audio tones to represent data being
transmitted.
Fleet A group of units formed such that only a shortened form of dialling (2 or 3 digits) is
required between them. These groups are normally assigned contiguous ident's.
FOACSU Full Off Air Call Set Up. A method of call set-up where the calling party has to
manually answer the incoming call before the trunking system will allocate a traffic
channel to the call. This reduces the loading on traffic channels as it prevents them
being allocated to calls when the called party is not present to deal with the call.
FPGA Field Programmable Gate Array.
FPP Field Personality Programmer.

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Hash (#) digits These digits are used for two purposes:
• For Selcall identities (encode and decode) - known as User Id digits. These digits
are replaced by the user id entered at switch on (if enabled)
• Use in DTMF dialled strings - their use is network dependent to access special
services.
IDENT A 13 bit number used for Identification purposes. Associated with a Prefix (PFIX)
this forms a 20 bit address which is used for identification purposes in signalling
between the radio and the trunking system.
Identity Name given to a sequence of tones which is used in sequential tone signalling. See
Valid Selcall Digits.
Idle State The state of the radio when it is not in a call.
Inaccessible A state of a channel such that it is unavailable to the user through normal methods
of channel selection. Therefore inaccessible channels will not appear on the
channel menu.
Include Calls These type of calls are used to allow a 3rd party to join into an existing call.
Link Establishment A delay incorporated into the start of every selective call or DTMF transmission
Time which allows for the finite delay of the radio equipment in responding to any radio
signal. This includes both the commencement time of the originating transmitter
and the response time of the receiver.
Locked A state of a channel whereby it is not possible to change channels using the normal
up/down keys on the channel menu until the OK key is pressed. See Auto Channel
Selection Lock.
MEP Miniaturisation Extent Parameter. Used in systems that use ANN numbering.
Modifier Part of a dialled string that modifies the nature of the call made to a number (e.g.
dialling "*9" before the number that is to be dialled will modify the call to be an
emergency call).
MPT1327 A signalling standard for Trunked Private Land Mobile Radio Systems. Defined for
systems in the UK but also used outside the UK. Issued January 1988.
MPT1343 A System Interface Specification for commercial Trunking networks. Defined for
systems in the UK but also used outside the UK. Issued January 1988.
NDD Network Dependent Data. This is a field within the CCSC codeword that is used by
the trunking system to identify information about the trunking network and, in
particular, information specific to the site that is radiating the control channel. It is
used by the radio when it is acquiring a control channel to identify valid channels.
Null Id A selcall identity that is not defined and whose tones' field is displayed as a blank.
Open A state where transmit and receive are allowed. The channel is no longer open
when reset. Contrast with Closed.
Normally an Open channel would not have Selcall Mute and PTT Inhibit would be
disabled.
OPID Network Operator Identity used in Regional Systems. See Roaming.
PABX Private Automatic Branch Exchange.

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Password An optional password system available on the radio. This feature is only available if
the radio does has a display and a keypad. To make available: go to Hardware
Components, Terminal Settings and set Product Type to one which has a display
and a keypad.
PFIX The 7 most significant bits of an MPT1327 address number. Normally same fleet
units have same prefix. Relates to individual and group address numbers.
PLL Phased Locked Loop.
PMR Private Mobile Radio (not normally trunked).
Priority Channel A channel in a search group that is scanned between every other channel.
PSD Peak System Deviation.
PSTN Public Switched Telephone Network
PTT Press To Talk. This is the term given to the operator’s key normally used to
commence transmitting a message.
PTT Inhibit A state whereby transmission using the PTT is not allowed. Also know as Tx
Lockout.
Queuing The storing of an Selcall Identity for later transmission.
If inhibited from transmitting a selcall sequence because the channel is busy then
the radio can queue the Send 1 / Send 2 sequence for later transmission. When a
radio unit is in Queuing mode all incoming calls are stored automatically in a queue
for later examination. The caller is given an indication that the call has been
queued by the called party. The queue will contain the identity of the caller and the
status value received (if a status call). Up to 20 calls may be queued. The Queuing
mode may be selected using the Modes Menu.
Note: Connecting a MAP27 device to a radio that is in queuing mode will disable
queuing. All incoming calls will then be routed both to the radio user interface and
to the MAP27 device connected to the radio. Also known as Logging Mode
Reference Frequency Normally this is generated from a high stability crystal oscillator reference and is
divided digitally in a frequency synthesiser for comparison with other frequency
sources, e.g. a VCO.
Registration Registration is a technique used to ensure that the trunking system knows the
location of radio units that are using the system. This allows the system to setup
calls quickly without having to search the whole system for the called radio.
Repeat Tone A selcall tone that is used to replace repeated tones. Fixed at tone E.
Example: An identity entered as '12333' would be sent by the radio as '123E3'.
Reset Resetting is caused by Three Tone Reset, a Remote Reset, an Individual reset or a
Group reset (Call Types in Decode Identity). When a radio is reset the effect on the
radio will be as follows:
• Any Call Alerts will be stopped
• The Call LED flashing will stop
• If the channel is in Open mode then the channel is closed
• The PTT is optionally inhibited see PTT Inhibit After Reset Sequence.
• In searching - if paused on a selcall channel then searching resumes
• If the Acknowledge property of a Decode Identity is set to 'Auto Interrogate' or
'Transpond & Auto Interrogate' then the Auto Interrogate encode identity is
transmitted.