Sepura STP8280 Portable TETRA Radio User Manual STP CK Manual final version1 2
Sepura plc Portable TETRA Radio STP CK Manual final version1 2
  
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STP_CK_Manual_final version1_2

STP8000 Series CAR KIT  
INSTALLATION & USER GUIDE 
 1
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INTRODUCTION 
The STP8000 car kit provides secure retention of the radio within a cradle. The car kit features battery charging, external 
antenna connection, external PTT keypad, hands-free operation with the external microphone and loudspeaker. A standard 
RS232 data port and USB is provided for data transfer applications. Connections are provided for optional accessories.  
Cable colour  Electrical parameters  Fuse 
RED  Vehicle +ve (12v MAX)  4 Amp  
BLACK  Vehicle –ve (vehicle chassis)  n/a 
PINK  Open drain Output, max current 0.5A   Protected by a re-settable fuse provided inside car kit 
YELLOW  Open drain Output, max current 0.5A   Protected by a re-settable fuse provided inside car kit 
BLUE  Input Signal Level 12VDC (200 uA max)  1 Amp 
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or
MICSMICALARMPTT
REMOTE PTT
CRADLE
Front INTERFACE UNIT (user interface)
USB DATA (RS232) SXC HANDSET/FIST MIC
Loudspeaker Output
50Ω
Rear INTERFACE UNIT (vehicle harness)
Antenna
Connections for accessories

STP8000 Series CAR KIT  
INSTALLATION & USER GUIDE 
 2
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Information 
The STP8000 car kit is designed for 12 V negative earth 
systems. In vehicles with a 24 V supply, an approved 
converter must be used, NOT a 12 V tap on the battery. 
The equipment is to be installed in accordance with the 
requirements of local radio communications authorities 
and/or Health and Safety regulations. 
12 V supply leads, antenna cables and speaker wiring is to 
be routed as far away as possible from gas or fuel lines. 
This reduces the risk to safety in the event of a leak. 
The car kit should be positioned so that it does not obstruct, 
or become at risk of damage from, any occupant or carried 
items. All cabling should be hidden and not left loose. 
Radio Software 
For correct operation of the STP8000 with the car kit, the 
STP8000 must have radio software of v9.0 greater. 
INSTALLATION 
This installation guide provides basic installation information 
and is not intended to be definitive, as different types of 
vehicles will require different ways installation arrangements.  
The installer must ensure that fixing screws of an appropri-
ate length are used (some installations may require different 
screws). The information given here is general and for guid-
ance only.  
The installation must comply with in-country CODE OF 
PRACTICE for the installation of mobile radio and related 
ancillary equipment in land based vehicles — e.g. FCS1362 
(formally MPT1362)see http:// www.fcs.org.uk. 
WARNING 
1  Disconnect the vehicle’s battery before commencing 
installation (be aware of effect on public broadcast radio 
security code, alarm systems and some engine man-
agement systems). 
2  Do not smoke, or use naked flames, when working near 
the vehicle’s fuel system. 
3  Ensure that fuel lines, hydraulic lines and existing 
cables are not damaged during installation. 
4  Ensure that the installation does not impede the normal 
operation of the vehicle, including the operation of any 
safety device, e.g., airbags and seatbelt tensioners. 
5  Speed control, fuel injection, anti-lock braking, naviga-
tion, air bag and other electronic systems are relatively 
immune to RF interference. However, if difficulty is 
experienced, or faulty operation suspected, consult the 
vehicle’s dealer.  
6  This equipment is suitable for 12 V negative earth vehi-
cles only. Use on other supply systems will result in 
damage to the equipment. 
7  No part of the equipment should be mounted such that 
injury to the occupants is likely during an accident. 
8  Prolonged operation of the radio in the car kit with the 
vehicle engine switched off, could drain the vehicle’s 
battery. 
9  Prolonged operation at high volume levels may cause 
the interface unit to become hot. 
Cradle 
The cradle should be attached to the vehicle’s interior in a 
convenient position using the mounting brackets. The 
location of the cradle should allow the user unrestricted 
access to the radio’s controls. The radio’s display should be 
visible to the user but not distracting when driving. The 
cradle should not prevent the user from controlling or 
operating the vehicle.  
Interface Unit 
Attach the interface unit to the vehicle’s interior, using, if 
appropriate, the four 25mm self-tapping screws provided.  
The interface unit should be mounted on a firm surface in-
side the passenger compartment, within reach of all cabling. 
The data socket should be easily accessible. Connect the 
lead from the cradle to the socket labelled “RADIO”. Con-
nect the vehicle harness to the socket labelled “AUTO”. 
Note: Do not install the interface unit in engine compartment. 
Cables & Connectors 
Ensure the cables due not rub against sharp edges and are 
not subjected to undue stress.  
Power Connection (thick red and black wires)  
•  The positive power line must include a fuse as close as 
possible to the power source.  The negative power line 
must be connected close to the battery-to-vehicle-body 
connexion (not directly to the battery) and must not 
include a fuse.  
•  It is recommended that the power cable runs are kept as 
short as possible. 
•  The blue wire provides an ignition sensing input.  If 
ignition switching is required, trim the wire to length so 
that it can be wired, via a fuse, to the ignition switch, 
using the splicing connector provided.  Otherwise this 
wire must be connected, via a fuse, to the permanent 
positive supply.  A fuse must always be fitted close to 
where the wire is connected. 
Fuse Ratings 
Positive supply  4 A  Ignition sense  1 A 
The ring terminated wires are for direct connection to the 
vehicle battery (do not connect at this stage); supply should 
not be taken from any other point.   
Feed the bullet terminated free ends through the bulkhead, 
using a grommet to protect the wires. Locate the free ends 
under the dashboard and connect to the main wiring har-
ness supplied with the car kit. Connect the ring terminals to 
the vehicle battery when the rest of the installation (see fol-
lowing sections) is complete and satisfactory. 
Remote Microphone 
The remote microphone is a high performance noise can-
celling type. For best results it should be directed towards 

STP8000 Series CAR KIT  
INSTALLATION & USER GUIDE 
 3
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the user and located at a distance of (15 – 25) cm from the 
user’s mouth. It is primarily intended for use in cars and light 
goods vehicles. The recommended positions are on the “A” 
pillar (for driver only) or centre-front of roof (for driver and 
front passenger). For larger vehicles, greater distances can 
be accommodated by increasing the remote microphone 
gain via the customising file in the radio. However, the noise 
and echo cancelling performance of the car kit may be com-
promised. 
Mount the microphone using the self-adhesive Velcro™ 
mounting supplied. Alternatively, for rugged applications, 
secure the base with self-tapping screws. Plug the micro-
phone into the jack socket labelled “MIC”.  
PTT  
The PTT keypad should be mounted to be convenient to the 
user when in a normal driving position. Plug the PTT into the 
jack socket labelled “PTT”. Mount the PTT using the self-
adhesive Velcro™ mounting supplied. 
Loudspeaker Installation 
The loudspeaker should be positioned so that it is unob-
structed and clearly audible by the user, but not close to, or 
in line of sight of, the remote microphone. The recom-
mended position is in the passenger footwell, facing the 
driver. 
Connect the loudspeaker lead to the 2-pin flying connector 
on the vehicle harness. 
Antenna Installation 
Follow the manufacturer’s instructions supplied with the 
antenna. Connect the BNC plug to the flying lead from the 
cradle and secure the leads.  
Ignition Sense Input (blue wire) 
If used, remove the crimp terminal from the blue wire and 
connect it to the ignition switched supply. 
If not used, plug the crimp terminal into the spare receptacle 
in the plug housing of the main wiring harness supplied with 
the car kit. Fold (do not coil) the spare wire together and 
secure. 
External Mute Output (pink wire) 
If the vehicle has an entertainment system with a standard 
external mute control, connect this output directly to it. Dur-
ing a call, the output switches to ground and the entertain-
ment system is muted. Use the appropriate connector for the 
entertainment system installed. 
If the entertainment system has no mute control, the exter-
nal mute output can be used to enable a relay to control the 
loudspeakers. When enabled, the output is switched to 
ground and protected by an internal re-settable 0.5 A fuse 
which resets automatically when the fault is cleared.  
If not used, fold (do not coil) the spare wire together. Insu-
late the free end and secure.  
External Alert Output (yellow wire) 
If local regulations permit, this output can be used to enable 
a relay (not for direct connection) to control the vehicle horn 
or other external alerting device. During a call alert, this out-
put switches to ground and the alerting device is audible 
outside the vehicle. It is protected by an internal re-settable 
0.5 A fuse which resets when the fault is cleared. 
If not used, fold (do not coil) the spare wire together. Insu-
late the free end and secure. 
IMPORTANT 
To avoid possible damage to the interface unit, check all 
wiring for short circuits to chassis, and other errors, before 
power is connected. 
OPTIONAL ACCESSORIES 
Handset/Fist Microphone (or Speaker microphone) & 
Soft Key 
Mount the rest so that it is easily accessible to the user. 
Place the accessory on its rest. Plug the accessory into the 
RJ45 socket labelled “HANDSET / FIST MIC”. For strain 
relief, fit the “P” clip to the cable and secure with one of the 
interface unit fixing screws.  
The soft key is located at the top of the fist microphone. 
Alarm Foot-switch (Soft Key 3) 
This item is not supplied by Sepura plc. A suitable switch will 
be terminated in a 3.5 mm stereo jack plug with the switch 
connected between the sleeve and the tip and the ring open 
circuit. The alarm will be activated when the switch closes 
(Z < 100 Ω).  
OPERATION 
SAFETY WARNING  
DO NOT operate your STP8000 radio in an explosive 
atmosphere. Always comply with “Turn OFF Two-way 
radios” signs where these are posted 
• Inserting the STP8000 radio into the cradle 
If necessary, remove the rubber bungs from the 
radio facility socket and the antenna socket. Lower 
the STP8000 into the holster and push down lightly 
to fully engage with the facility socket in the bottom 
of the holster. Push the front of the radio towards 
the back of the cradle until the latch operates. The 
car kit switches on automatically when the radio is 
inserted. 
Note: To maintain reliable aerial operation, clean 
the holster aerial connector regularly using an 
aerosol can of clean air. 
• Removing the STP8000 
Press the release button at the top of the cradle and 
withdraw the radio. The car kit switches off 
automatically when the radio is removed and draws 
negligible power from the vehicle’s battery. 

STP8000 Series CAR KIT  
INSTALLATION & USER GUIDE 
 4
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Using the STP8000 series with the car kit 
All of the controls on the radio function as normal. Calls can 
be initiated, answered and ended by using the controls on 
the radio. Refer to the STP8000 user guide for further 
details. Receive audio is amplified and fed to the car kit 
loudspeaker. The user’s voice is picked up by the hands-
free remote microphone, which should, ideally, be facing 
towards the user. 
• Volume Control 
Set the loudspeaker volume with the radio’s volume 
control. 
• Half-Duplex Calls using Remote Microphone & PTT 
Press the external PTT button and speak in a normal 
conversational manner; release to listen. 
• Full-Duplex Calls using the Remote Microphone  
Both parties can speak and listen at the same time with 
hands free. Ensure that the radio volume is set to the 
minimum comfortable level. 
Calls using Optional Accessories 
A fist microphone may be used with the car kit. The car kit 
automatically senses which is in use and functions as 
appropriate. 
• Fist Microphone 
When the fist microphone is lifted, the remote microphone 
is automatically muted, but the loudspeaker remains in use. 
Press the PTT button on the fist microphone to talk and 
release to listen. Any alert tones produced by the radio 
during transmit will override the loudspeaker muting and be 
audible.  
• Fist Microphone soft key 
The soft key of the fist microphone, invokes the assigned 
function programmed in the STP8000 being used.  
• Private/Public Mode Key (on radio, if programmed) 
During calls, this key switches between accessories    (e.g., 
transfer from handset to handsfree).  
• Alarm Foot-switch  
Press the foot-switch to initiate an emergency call. 
• Data Communication 
An RS232 serial data port and an USB serial port is 
provided in the interface unit. Connect a PC or data 
terminal (with appropriate application software) to the 
socket labelled “DATA” via a standard 9-way serial lead 
(not null modem). Follow the instructions supplied with the 
application software. Disconnect lead from interface unit 
when not in use. 
Optional Functions 
The following functions are provided as standard and will be 
connected if specified prior to installation.  
• Ignition Sense  
If connected, the radio will sense the state of the ignition 
switch. When the ignition is turned off, a configurable timer 
is started. If the timer is set to zero, turning off the ignition 
switch switches off the radio. If the timer is not set to zero, 
the following message is displayed and the timer started. 
Press any key to stop switch off. 
Pressing any key will reset the timer. When the timer period 
expires, the radio will switch off and any unread messages 
will be lost. 
If the ignition switch is turned on before the timer expires, 
normal operation will resume. 
The timer parameters are set in the radio configuration. 
Charging is not halted by switching off the radio. 
• External Mute  
If connected, the vehicle entertainment system will be 
muted during calls. 
• External Alert  
If connected, the vehicle’s horn, or other external sounder, 
repeats incoming call alerts for audibility outside the vehicle 
in noisy environments. Note: This function must not be 
used if local regulations do not permit its use. 
Battery Charging 
The battery charges whether the STP8000 is switched on or 
off and terminates automatically. The indicator LED on the 
radio glows orange during charging, green when charged 
and red under fault conditions — see STP8000 radio user 
guide for further information. 
Problems and Hints 
If the car kit or radio fails to function, check the following. 
•  The radio is properly engaged in the cradle. 
•  If ignition sensing is enabled, check ignition is switched on. 
•  The battery may be discharged (the radio requires battery 
power to transmit). Allow the battery to charge. 
•  The radio functions correctly when removed from the car 
kit. 
•  The in-line fuses to the vehicle battery have not failed. 
•  The vehicle battery is not discharged. 
•  The antenna and its connections are functional. 
If the problem persists, refer to your supplier. 
Sepura plc, Radio House,                  Issue 1.2 (08/09) 
St. Andrew’s Road, Cambridge, 
CB4 1GR.  England.  
www.sepura.com 
Public mode (default) 
Handsfree: 
Remote microphone 
and Loudspeaker 
Private mode 
Handset/Fist Microphone 
and Loudspeaker