Philips PRM80 Series User manual

PHILIPS
PRM80 SERIES VHF/UHF MOBILE
RADIO TELEPHONE
WARNING
The transistors used in the transmitter power amplifier contain beryllium
oxide, the dust of which Is toxic.
No danger can arise from normal handling, but no attempt should be
made to tamper with the encapsulation of these devices. They must not
be discarded with Industrial or domestic waste.
Publication Ref. 9585 666 80000
Issue B. - November, 1989.
This handbook Is for the maintenance of telecommunication equipment. The performance
figures quoted are typical and are subject to normal manufacturing and service tolerances.
The right Is reserved to alter the equipment or specifications In the light of technical
development.
This publication Is copyright and no part may be reproduced or copied without the prior
permission of Philips Radio Communication Systems (Australia) .
Philips Radio Communication Systems
Box 105, Clayton, Victoria, Australia, 3168. Telephone: [phone]
Telex: AA20165 (PHILIND) AUSCLTW+ FAX: [phone]
Printed
in

SECTION 1
INTRODUCTION
Section 1 Page
1
1.1 PRODUCT DESCRIPTION 1
1.1.1 Product Variants 1
1.1.2 Product Family 2
1.2 MECHANICAL CONSTRUCTION 3
1.3 SERVICE/ACCESSIBILITY 4
1.4 SALES CODES 5
1.4.1 The 12-digit Sales Code 5
1.4.2 The 20-digit Supplementary Technical Code 5
1.5 OPERATING INSTRUCTIONS 7
1.5.1 Safety First 8
1.5.2 Advice to User 8
1.5.3 Introduction 9
1.5.4 Common Functions And Facilities 9
1.5.5 Other Functions 10
1.5.6 Scanning Functions 12
1.5.7 Selective Call Facilities 13
1.5.8 Alert Tones 15
1.5.9 Equipment Data Sheet 16
SECTION 2 TECHNICAL SPECIFICATIONS Section 2 Page 1
2.1 GENERAL 1
2.2 RECEIVER 3
2.3 TRANSMITTER 4
2.4 SIGNALLING 5
2.4.1 PRM80 Selcall Specification 5
2.4.2 PRM80 CTCSS Specification 7
SECTION 3 TECHNICAL DESCRIPTION Section 3 Page 1
3.1 GENERAL OVERVIEW 1
3.1.1 Receiver 2
3.1.2 Transmitter 2
3.1.3 Synthesizer 3
3.1.4 Microprocessor Control 3
3.1.5 Signalling 3
3.1.6 Power Supply and Reset 4
3.1.7 Controls and Display 4
3.2 DETAILED TECHNICAL DESCRIPTION 5
3.2.1 Receiver 5
3.2.2 Transmitter 8
3.2.3 Synthesizer 12
3.2.4 Central Control 17
3.2.5 Front Panel 26
(i)
TABLE OF CONTENTS

SECTION 4 ALIGNMENT PROCEDURE Section 4 Page 1
4.1 TEST EQUIPMENT 1
4.2 GENERAL INSTRUCTIONS 1
4.3 PRELIMINARY ADJUSTMENTS 1
4.4 TEST FREQUENCY TABLE 2
4.4.1 Selcall Encode Test 3
4.5 THE PROCEDURE 4
4.5.1 VCO Alignment 4
4.5.2 Transmitter Power Adjustment 4
4.5.3 Reference Oscillator Tuning 5
4.5.4 UHF Receiver Front End Alignment 6
4.5.5 VHF Receiver Front End Alignment 7
4.5.6 Mute Maximum Alignment 8
4.5.7 Transmit Modulation Alignment (No CTCSS) 9
4.5.8 Transmit Modulation Alignment with CTCSS 10
4.5.9 Transmit Modulation Alignment with Selcall 11
SECTION 5 INSTALLATION INSTRUCTIONS Section 5 Page 1
5.1 GENERAL INFORMATION 1
5.1.1 Operator Access 1
5.1.2 Location Dangers 1
5.1.3 Vehicles Fitted With Electronic Devices 1
5.1.4 Specialised Vehicles 2
5.1.5 Dash Mounted Equipment 2
5.1.6 Petrol Powered Vehicles 2
5.1.7 Gas Powered Vehicles 2
5.2 MAIN UNIT FITMENT 3
5.2.1 Cradle Installation 3
5.2.2 Transceiver Fitment 3
5.2.3 Transceiver Removal 3
5.2.4 Microphone Installation 3
5.2.5 Microphone Removal 4
5.2.6 Torque Settings for Retaining Screws 4
5.3 ANTENNA INSTALLATION 4
5.4 DC SUPPLY CONNECTION 4
SECTION 6 COMPONENT SCHEDULE Section 6 Page 1
6.1 W1 BND, 3Ch, 25kHz STD. 1
6.1.1 Front Panel Assy Compl 1
6.1.2 Control Brd (std) Compl 1
6.1.3 Radio Brd W1 25kHz Comp 4
6.1.4 Common Parts 10
6.2 OPTIONS 10
6.2.1 CTCSS And RTB 10
SECTION 7 DIAGRAMS Section 7 Page 1
7.1 List of Illustrations 1
(ii)

SECTION 1 INTRODUCTION
1.1 PRODUCT DESCRIPTION
The PRM80 series of mobile radio transceivers are primarily, under dash
mounted local controlled simplex radios, for vehicular application.
The design concept utilises an advanced microcomputer controlled frequency synthesizer.
The microcomputer also performs analogue signalling. The selective calling systems
provided meet the requirements of both standard despatch communications and special
systems applications in world-wide private mobile radio markets.
In addition to the tone sequential signalling, continuous tone controlled squelch system
(CTCSS) signalling is provided and includes the reverse tone burst encode feature.
The customization of the microcomputer control is via an electrically erasable programmable
read only memory (EEPROM). The mobile radio may be configured to meet specific
customer requirements by programming the EEPROM via the data port available at the
microphone socket.
An innovative receiver design provides full band coverage without the need for mechanical
tuning. Similarly, a range of broadband transmitter power amplifiers, offering a selection of
power output levels, provide full band coverage without the need to mechanically re-tune.
The local control front panel is available in two versions. One version provides up to 9
channels and control of a limited set of software programmable options. The other version
provides up to 64 channels, and additional buttons and display indicators give the operator
access to a more comprehensive range of features. Both front panels utilise liquid crystal
displays with permanent backlighting.
The PRM80 is constructed with extensive use of miniature surface mounted components.
The compact electro-mechanical design interconnects the various circuit functions without
the use of point to point wiring, making the PRM80 a true "wireless" radio.
1.1.1 Product Variants
The main unit of the PRM80 transceiver is available in a number of uniquely configured
hardware variants. These variant related items are listed below.
i) Channel Capacity 9-channel or 64-channel
(Different front panel and memory capacity).
Section 1 Page 1

ii) Transmitter Power 1 to 6 watt, 1 to 25 watt, 10 to 40 watt.
(Different printed circuit board assemblies required for
each option).
iii) Frequency Band EO band, A9 band/BO band, Tm band,
UO band, W 1 band, W4 band.
(Different printed circuit board assemblies required for
each band).
iv) Channel Spacing 12.5kHz, 20kHz, 25/30kHz.
(Different printed circuit board assemblies required for
each option).
v) Frequency Stability: +/-5 ppm -10 to +60 Deg C (Better quality crystal).
+/-10 ppm -10 to +60 Deg C (Standard crystal).
+/-5 ppm -30 to +60 Deg C (Extended temp option).
+/-2.5 ppm -10 to +60 Deg C (TXCO).
+/-2.5 ppm -30 to +60 Deg C (TCXO)
+/-10 ppm -30 to +60 Deg C (Extended temp option)
vi) Receiver Mute Adjustable/Preset.
(Additional components required on printed circuit board).
vii) Signalling - Without CTCSS encoder/decoder
- With CTCSS encoder/decoder
(Additional components on printed circuit board).
- Standard Selcall
- High performance Selcall
(Additional components on printed circuit board).
viii) Systems: - Standard no systems interface
- Systems interface.
(Additional components on printed circuit board).
1.1.2 Product Family
The PRM80 is provided with a family of product related ancillaries for standard vehicular
installation and base or office environment application.
The ancillaries are:
i) Desk top housing with mains power supply.
ii) Stand microphone.
iii) Boom microphone.
iv) Hands-free microphone.
v) Small loudspeaker.
Section 1 Page 2

vi) Large loudspeaker
vii) Depot Data programmer.
viii) 24 volt to 12 volt do to do converter.
ix) Interference filter (12 volt do power).
1.2 MECHANICAL CONSTRUCTION
The main transceiver unit contains three printed circuit boards. Each are double sided epoxy
fibreglass with plated through holes. Extensive use is made of surface mounted components but
conventional leaded components are also used.
The three printed circuit boards are defined as:
i) FRONT PANEL
ii) CONTROL
iii) RADIO
An aluminium diecast chassis provides for heat sinking of the power amplifiers and regulator
devices. The radio and control PCBs are attached to this and are shielded from each other by a
central partition which is part of the main casting. The radio PCB has a separate zinc die cast
shield which is fitted on the component assembly side. This shield effectively compartmentalizes
circuit function areas on the radio PCB. Interconnection between the radio and control PCBs is
via a flexible printed circuit with a zero insertion force socket fitted to the radio PCB.
Interconnection from the control PCB to the front panel PCB is via a flexible printed circuit with a
zero insertion force socket fitted to the front panel PCB. No wiring looms are used in the
mechanical assembly.
A moulded plastic sleeve provides a styling cover over the PCB and chassis assembly. The front
panel PCB is housed in a separate plastic moulding.
In the 9-channel front panel, four moulded plastic buttons are clipped in as part of the front panel
moulding. A clear plastic lens welded to the front panel moulding provides protection for the
liquid crystal display. Behind the LCD is a light diffuser lens to aid in back lighting and location of
the LCD electrical connector (zebra strip). Placed between the front panel moulding and the front
panel PCB is a moulded rubber mat containing the switch contact pads and this mat also aids in
location of the complete LCD/Diffuser/Zebra Strip assembly.
The 64-channel front panel is similar in construction to the 9-channel version, however, 8 buttons
are provided which are clipped into the moulded assembly. The LCD is retained on the front
panel printed circuit board assembly by a pressed metal frame. This frame also retains the
switch rubber mat and LCD diffuser assembly.
The front panel PCBs are attached to the front panel moulding by fixing screws.
Section 1 Page 6

The front panel assembly is attached to the outer sleeve and a dust and water seal gasket is
provided at this interface.
The antenna connection is provided by a chassis mounted BNC type socket at the rear of the
main chassis. Connection to the loud speaker and do power is provided by a 4-way connector
socket mounted on the control PCB, and is accessed at the rear of the main chassis. For special
systems applications, a 15-way 'D' type connector is mounted on the rear of the chassis and
connected internally via a ribbon cable and plug to the control PCB.
The microphone socket is mounted on the control PCB and is accessed via an opening in the
front panel moulding. A clip-on moulded plastic facade covers the microphone socket
connection.
The installation mounting cradle is fixed to the central partition section of the main chassis. Two
fixing screws remain attached to the chassis and secure the outer sleeve in position. The cradle
is secured in position by two more screws. Tilt adjustment of the cradle mounting is set before
the screws are finally tightened.
1.3 SERVICE/ACCESSIBILITY
To gain access to the PCB assemblies the front panel must be detached first (microphone, knob,
one fixing screw, one lock nut and disconnect the flexible printed circuit from the front panel).
The outer sleeve is then removed (four fixing screws). The front panel may be re-attached to the
control PCB with the flexible PCB/socket interconnection. At this level of assembly the equipment
may be operated and aligned. Access to the component side of the control PCB is possible. The
majority of the components on this board are surface mounted and may be serviced with the
PCB in-situ.
To gain access to the radio PCB the radio screen must be detached (nine fixing screws). The
equipment may be operated at this level of assembly but with degraded performance in terms of
case radiation and spurious response and emissions. For service, access to the component side
is possible . The majority of the components on the radio PCB are surface mounted and may be
serviced with the PCB in-situ.
For access to the underside of the radio PCB three fixing screws must be removed, fixing screws
on the transmitter power amplifier devices must also be removed (6 for UHF 25W & 40W, 4 for
the UHF 6W version, 3 for the VHF 6W & 25W, and 5 for the 40W VHF version). The antenna
socket connection must be de-soldered and the 13 volt power connection at the chassis feed
through must be de-soldered. The radio board may then be detached from the chassis but will
remain connected to the control PCB by the flexible interconnecting circuit. This flexible PCB
may be disconnected at the socket on the radio board.
For access to the underside of the control PCB the front panel must be detached. The
microphone must also be removed. The control PCB is retained by six fixing screws, the audio
amplifier IC and two regulator ICs are attached to the chassis by four fixing screws which must
be removed. The 13 volt power connection at the chassis feed through must be de-soldered.
Section 7 Page 4

The control board may then be removed from the chassis but it remains connected to the radio PCB
and front panel by a flexible interconnecting circuit-Care must be exercised when re-attaching a
control PCB to the chassis, to ensure that the 5V regulator, IC208, has the insulating washer and
bush correctly fitted. Similarly, when re-attaching the radio PCB
to the chassis, care must be exercised to ensure that the transmitter power amplifier devices have
the correct amount of heatsink compound applied to their mounting faces before fixing to the
chassis.
Should the interconnecting flexible printed circuit fail, a hand solderable replacement alternative is
available. The factory fitted flex strip must first be carefully removed from the control PCB, by
applying a "hot air" de-soldering tool to the solder joint and peeling away the soldered connections.
1.4 SALES CODES
There are, basically, two codes to be described; the 12-digit sales code and the 20-digit
supplementary technical code. A sample of this latter code sheet is included.

1.2
Provisi
onal
3
Chann
el
Spacin
4,5
Freq
Band
(MHz)
6Freq.
Stab
7RF
Power
(Watts)
8
Control 9 Version
10
CTCS
S
Signall
11
Seque
nt.
Signalli
12
Installa
tion
13
Mic.
14
Speak
er
15
Noise
Blanke
r
16
Equip
ment
Label
17
Power
Switch
18
Syste
ms
19
Mute 20 Provisional
Not
fitted. Not fitted. No kit. Not
require
d.
Not
require
d.
Not
fitted- Philips .Stand
ard
conne
Not
fitted. Variab le.
7S-
12.5 5pp
m
-
T0
1 to
25
(Std
-
Local- PRM8
010. ENC. Selcall ENC Swivel
bracke
t
Stand
ard- Stand ard- Fitted. None fitted. Bypas
sed
for
Fitted.
I
Fixed-
2 R - 20 E0 -
68-88 2.5p
p- 1 to 25 PRM6
020. ENC/ DEC. Selcall
ENC( Stick. Comp
act.
3 V - 25 80.
132-
I56
1opp
m
-
T0 to
T T0
6
(Low
ENC/
DEC
plus
DTMF.
4 X - 30 A9 -
1445-
T74
2.5pp
m
-
30 to
10T04
0
(High
ENC/
DEC
plus
6TM-
400- 5pp m
BLo -
440-
470
lopp
m
-
30 to
7470-
500
6W4
500 -
520
9

1.5.1 Safety First
1. The use of the mobile radio while driving may be in breach of traffic regulations in
some countries. Check with your local Traffic Authority for further details.
Please do not use a hand-held microphone while you are driving.
2. DO NOT operate the mobile radio in an explosive atmosphere.
Obey the "Turn Off TWo Way Radios" signs where these are posted.
3. To avoid radio frequency injury, DO NOT TOUCH THE ANTENNA whilst
the mobile radio is in use.
4. A possibility exists, based on isolated incidents in the past, that the use of a mobile
radio in your vehicle may result in the altered operation of electronic systems
(eg. fuel injection and braking systems).
If this occurs:- TURN OFF Your Mobile Radio IMMEDIATELY, and contact your Sales
Representative for advice.
5. Fans, power accessories, window demisters or radios may alter the operation of your
mobile radio. Consult the accessory manufacturer for details regarding the elimination
of radio interference from such accessories.
1.5.2 Advice to User
1. Only transmit when the channel is free.
2. Do not speak while you can hear a tone sequence coming from the loudspeaker.
3. Hold the microphone 2 to 3 centimetres from your mouth and speak across it.
4. Do not occupy the channel any longer than is necessary.
5. Replace the microphone after use.
6. Identify yourself using your allocated radio identity.
7. Restrict the length of messages.
8. Avoid making calls from known poor signal areas such as the radio system's fringe
areas or from screened areas, eg. an underground car park or underpass.
Section1 Page 11

1.5.3 Introduction
The Type PRM8010 transceiver is a versatile, microprocessor-controlled, dash-mounted, mobile
radio designed to access facilities provided by the Private Mobile Radio Service.
The transceiver is software programmable to produce the options required to suit specific
requirements. Though many options are available, each unit is dispatched from the factory
programmed with a specific software application package, so that only a few parameters need to
be varied in the field (eg. frequencies, selective call identities).
This guide describes all the facilities that are currently available, though some may not be
available on your equipment.
The facilities that are available to you are most easily identified by examining the key label
overlay on the front panel display.
Common functions and facilities are described in section 1.5.4.
Other functions are described in section 1.5.5.
Scanning functions are described in section 1.5.6.
Selcall functions are described in section 1.5.7.
Some specially adapted application packages may include facilities described separately in
supplementary information sheets.
1.5.4 Common Functions And Facilities
1.5.4.1 SWITCH ON/OFF
To switch on, press the On/Off switch.
The LCD (Liquid Crystal Display) backlighting will be on when power is connected to the set.
To switch off, press the On/Off switch.
If the radio is wired for external on/off switching the On/Off switch will control only the display.
The radio will be automatically switched on and off via external switching circuit.
1.5.4.2 SPEECH RECEPTION
Select the required channel by using 'Channel UP' button.
Pressing this button enables the selection of higher numbered channels, returning to
the lowest channel number once the highest number has overflowed.
Set the 'squelch' control fully anti-clockwise.
In the absence of a signal the squelch control eliminates receiver noise and also
suppresses weak interfering signals.
Section 1 Page 9

Adjust the 'volume' control until receiver noise is heard.
The volume control adjusts the speech level at the loudspeaker. Clockwise
rotation increases the volume, anti-clockwise rotation decreases the volume.
Turn 'squelch' control clockwise just until the receiver noise disappears.
Note that this is the most sensitive setting of the squelch control. Turning the squelch
control further clockwise will suppress weak interfering signals.
If the receiver is fitted with a 'fixed squelch' then the volume control is used as
normal to obtain a suitable audio level when speech is being received.
If the radio is fitted with a 'squelch defeat' switch, this button may be used when
operating in very weak signal areas.
1.5.4.3 SPEECH TRANSMISSION
To avoid interfering with other users of the operating channel, listen first to ensure that no
transmissions are being made.
Make sure that the 'Busy' indicator is OFF.
Holding the microphone 2 to 3 centimetres from the lips, press the 'press-to-talk' switch (on the
microphone) and note that the transmit indicator is turned ON. Speak clearly across the face of
the microphone in a normal conversational manner.
Use the correct operating procedure, and keep transmissions short. Release 'press-to-talk'
switch as soon as the message is finished and note that the transmit indicator is turned OFF.
When the 'transmit limit timer' option is fitted the transmitter will be turned off at
the end of preset time, and a warning signal (if programmed) will be heard until
the 'press-to-talk' switch is released. Re-pressing the 'press-to-talk' switch will
turn on the transmitter.
If the 'transmit inhibit' option is fitted transmission will not be possible while a
signal is being received, as indicated by the Busy Indicator.
1.5.5 Other Functions
This section deals with mobile facilities that are not apparent from the front panel of the
transceiver, but which may significantly affect the operation of the transceiver.
These facilities are usually specially configured and require special operating practices which will
be explained by your system controller or in supplementary information sheets. If you are unsure of
how your equipment is configured with respect to these facilities you should contact your supplier.
1.5.5.1 TRANSMIT INHIBIT
If your equipment has the transmit inhibit facility programmed, you will be prohibited from
transmitting either with the 'press-to-talk' switch or with any 'Send' button whenever the radio
channel is busy and the 'Busy' indicator is on.
Section 1 Page 13

If the equipment is fitted with CTCSS and/or selective calling, the busy indicator and the transmit
inhibit facility are both defeated whenever a valid call is received, so that you can respond to the
call.
1.5.5.2 TRANSMIT LIMIT TIMER
The transmit limit timer limits the duration of the transmission. The transmission time may be set,
in steps of one second, from 1 to 255 seconds. On expiry of the timer the transmission will cease
and a continuous audible alarm will sound while the PTT switch is held pressed. To re-initiate
the transmission the PTT switch must be released and then pressed.
1.5.5.3 TRANSMIT RE-PTT TIMER
The transmit re-PTT timer limits the minimum time between the release of the PTT switch, and
the pressing of the PTT switch for the next transmission. The minimum time may be set, in
steps of one second, from 1 to 255 seconds. If the switch is pressed during this time a
continuous audible alarm will sound while the PTT switch is held pressed.
1.5.5.4 TRANSMITTER/RECEIVER LOCKOUT
These facilities are usually programmed together and only on carefully controlled 'closed'
radio systems. On such systems users are prevented from listening to the channel.
1.5.5.5 CTCSS (CONTINUOUS TONE CONTROLLED SQUELCH SYSTEM)
When CTCSS encode only is fitted a sub-audio tone accompanies every mobile transmission.
If the CTCSS decode is supplied, no communication will be heard unless the incoming
transmission contains the correct CTCSS tone.
CTCSS decode can be bypassed by any of the following (if programmed):-
Removing the microphone from its cradle.
By enabling the monitor button.
1.5.5.6 MICROPHONE CRADLE OPERATION
Depending of the options programmed, the cradle can affect the operation of the transceiver in
any of the following ways:
Mobile may transmit Automatic Number identification whenever the microphone is
removed from its cradle.
Mobile may enter Monitor mode whenever the microphone is removed
from its cradle. Calls may be reset whenever the microphone is returned
to its cradle.
Scanning will only be active if the microphone is in its cradle.
If the microphone is removed from its cradle while the scan has stopped on a
channel, that channel will remain selected until the microphone is returned to its
cradle.
Section 1 Page 14

If the microphone is removed from its cradle while the transceiver is still
scanning, the p
riority channel will be selected. The channel display will
1.5.6
Scanning Functions
When fitted this option allows a mobile to scan a number of radio channels for a valid signal.
There can be up to 9 channels in a scan group and one of these can be designated as a Priority
channel. This channel will differ from the basic channels in the following:
If there is a priority channel programmed, the radio will check the priority
channel for the presence of a signal in between normal channels.
If the microphone is removed from its cradle while the transceiver is still
scanning, the priority channel will be selected and the Channel Display will
While on a scan channel, mobile will still check the pr
iority channel for the
presence of a valid signal until the microphone is removed from its cradle.
Scanning will only be active if the microphone is in its cradle (ie. on
-
hook).
1.5.6.1 OPERATION
To enter Sc
an mode press the SCAN
button.
The Scan chevron w
ill turn ON. The Channel display will be
blanked and the SCAN indicator will start flashing.
If the error tones sound when the SCAN button is pressed, it will
mean that:
the scan group is empty, or
the current channel is not allowed as a priority priority
channel, or
the 'press
-
to
-
talk' switch is currently pressed.
The radio will scan the selected channels in sequence. The scan will continue until a valid
signal is found.
When a valid signal is found the mobile will halt scanning, the 'Scan'
indicator will cease flashing to become steady, and the channel display
will show the channel number selected. .
Remove the microphone from its cradle.
This channel will remain selected until the microphone is returned to its cradle and
scanning resumes.
Terminate the s
can mode by pressing the 'Scan' button.
Section 1 Page
15

The mobile will return to the channel that was selected before the scan function was initiated.
1.5.6.2 SELECTION OF PRIORITY CHANNEL (if enabled)
Select the required channel by using 'Channel UP' button.
Use the 'SCAN' button to initiate scanning.
The channel selected will automatically become the priority channel.
Note: The 'ERROR TONE' will sound if the channel that is selected
is not permitted as a scan channel.
1.5.7 Selective Call Facilities
Selective call is an optional fitting which can allow the mobile radio to respond to, and/or initiate a
signal carrying an identifying number.
A number of different operations are available depending on the system configuration and the
features programmed.
The facilities currently available are indicated below. Please note that some of these may not be
available on your equipment.
1.5.7.1 SEND 1
The Send button causes a programmed identity to be transmitted. This identity is used to identify
the mobile to the base control.
1.5.7.2 SEND 2
Used as Send 1 but provides for a second identity.
1.5.7.3 ALARM
Alarm is a special version of Send. It is used to indicate the presence of an alarm condition or it
can be used as a priority call request. The exact use of this function will depend upon how your
particular radio system has been designed. You should have specific instructions about when this
button is to be used.
Please note that the mobile radio is controlled by the base controller during the
emergency mode.
Alarm may also be activated by a special switch (if fitted),external to the
equipment.
Alarm condition can be reset from base control, or by disconnecting the radio
from the battery.
Section 1 Page 13

1.5.7.4 EXTERNAL ALERT
This button is used to control an external device, such as the vehicle horn. It is normally switched
on when you expect to be outside your vehicle and it will be activated, whenever your equipment
receives a valid call.
1.5.7.5 MONITOR / RESET
This button can be programmed to enable you to listen to all calls on the channel. It can be toggled
between the quiet and listen modes.
This button also cancels the called indicator.
1.5.7.6 RESET
In closed systems, the mobile is allowed to listen to a voice channel only when it receives a valid
selcall from the base control. The Reset button allows the mobile to revert to quiet mode. When
used it cancels the called indicator.
1.5.7.7 TRANSPOND
Transpond provides a facility for the mobile to automatically transmit a predefined identity to
acknowledge that a call has been received. This switch is used to enable/disable this facility.
1.5.7.8 SELCALL RECEPTION
Whenever a valid call is received the equipment will display the 'Call' indicator. It will also sound the
appropriate call alert.
You may answer the call by operating the 'press-to-talk' switch. The indicator and alert tone will be
cancelled. Additionally, if programmed, removing the microphone from its cradle will cancel the
indicator and alert tone. Alternatively the call may be cancelled by pressing the monitor button once.
If you do not answer the call, the call alert will stop after a few seconds but the indicator will remain
on. Depending on how your radio system is configured, the call can be terminated in one of the
following ways:
Removing the microphone from its cradle.
Pressing the 'Monitor' button once.
By receipt of 'Remote Reset' signal from the base
control. By expiry of the 'timed reset timer'.
By returning the microphone to its cradle.
Section 1 Page 14

TYPE OF ALERT
ERROR Generated when operator
TONE presses an invalid button.
_
2
CONTINUO
Generated on Invalid
TONE
of PTT, or If microphone left
ERROR of cradle
3
KEY
Generat
ed when any button Is
BEEP
pressed.
TONE
4
DECODE 1
Generated for selcall decode
ALERT
response.
TONE
5
URGENT
Generated for selcall urgent
ALERT
response.
TONE
6
GROUP
Generated for selcall group
ALERT
response.
TONE
NORMAL Generated for selcall normal
DECODE
response.
ALERT
TONE
1.5.8 Alert Tones
The frequency of all 'alert tones' is 500Hz.
Section 1 Page 15

Serial Number 200001
Hardware 12NC
9525 001 10072
Application Code
Frequency Band 470 - 500MHz
Encode Signalling
Options
Encode Type Identity Tone Period
Individual Identity (1)
53454
l00ms
Individual Identity (2)
45554
l00ms
Individual Identity (3)
45453
l00ms
Emergency Identity
45345
l00ms
Emerg
ency Identity
45435
looms
Individual Call
45345
looms
Encode Tone Set
CML CCIR
Lead in Delay
mSec
600
Lead out Delay msec 100
Decode Signalling
Options
Indiv Decode Identity 45345
Group Decode
435345
Reset Decode Identity
43534534
Decode Tone Period
l00ms
Decode Tone Set CIVIL CCIR
Scan Group Selection
Is Selectable Priority
Required
No
Priority Channel
3
Channels in Scan
14679
Channel Table
Rx
TX
Ch
Freq
Lock
CTCSS
Freq
Lock
CTC/
Selc
Co
Scan
Power
1
471.0000
No
471.0000
No
Yes
No
Yes
High
3
475.0000
No
No
No
Yes
High
4
476.0000
Yes
No
No
Yes
High
5
477.0000
No
478.0000
Yes
Yes
No
No
High
7
480.0000
No
481.0000
No
No
No
Yes
High
9 495.0000 No No Yes Yes High
1.5.9
Equipment Data Sheet
An individual data sheet listing all transmitter and receiver frequencies, including
signalling information, is supplied with each transceiver. It is important that this data
sheet is retained for future use such as the equipment requiring repair or change to
parameters (eg. channels or identities). A sample data sheet is shown below.
Section 1 Page 16