GPI KOREA GPWM-900T Wireless Transmitter User Manual 900police Generic Manual fcc
GPI KOREA, Inc Wireless Transmitter 900police Generic Manual fcc
Users Manual

900MHzDigital Wireless
Microphone System
USER GUIDE
TABLE OF CONTENTS
1. Description of the units ....................................... ........................3
1. Quick Set Up and Operation .......................................................4
2. Installation....................................................................................5
3. Guidelines For Best Performance................................................6
4. Troubleshooting Guide.................................................................7
5. Technical Specifications...............................................................8
6. Factory Service ............................................................................9
7. Warranty......................................................................................9
8. Accessories and Parts ............................... ...................................9

FCC NOTICE
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES.
OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS:
(1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND
(2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED,
INCLUDING INTERFERENCE THAT MAY CAUSE UNDERSIRED OPERATION.
< Part 15.106>
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communication. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to try to correct
the interference by one or more of the following measures :
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a oircuit difference from
that to which the receiver is connected.
- Consult the dealer of an experienced radio/TV technician for help.
NOTE : The manufacturer is not responsible for any radio or TV interference caused by unauthorized
modifications to this equipment. Such modifications could void the user's authority to operate the
equipment.

DESCRIPTION
Base (Receiver)
Transmitter
Green LED: In-use, Record
RED LED: Charging
Green LED: Full charge
Terminal
For charging
Antenna
Connection
Modular Jack
Audio Jack Input
Record Button
Lapel Mic. Cover
Emergency Button
Green: In-use (Light On)
Record (Flashing)
RED LED: Out of Range RED LED: Low Battery
Audible and Vibration
Selectable Switch
Power On/Off
Switch

1. QUICK SET UP AND OPERATION
Synching Up the Transmitter and Base
The synch operation only needs to be performed the first time a system is used, or a new bodypack is used
with a base previously synched to another bodypack. Do not perform the synch operation multiple times;
it only needs to be done one time when a new bodypack is used with a new base.
1) Turn the transmitter power switch to ON and place the transmitter in the recharge cradle of the base.
The transmitter goes in the base with the belt clip facing out.
2) The recharge LED will light (Green if fully charged, Red if charging). Leave the transmitter in the cradle
for 4 hours for a full charge.
3) Press the REC button on the transmitter and hold until the In-Use LED on the transmitter and base start
to flash, then release the button.
4) After a few seconds the light will stop flashing, and a beep will sound (If the beep is enabled).
5) The transmitter and base are now synched and will continue to be until another transmitter is linked to
that base.
Normal Operation
1) With the transmitter synched up, remove it from the cradle, plug in the lapel microphone (if used)
and place the transmitter on your belt.
2) When you remove Transmitter from the cradle, The TR and Base’s In-USE LED will light a constant
Green and you will hear short beep. To start the recording, press the REC button and the In-Use
LED will blink in green.
3) To end recording, press the REC button and the In-Use LED will light a constant green.
4) At the end of your shift turn the transmitter off and replace it in the charging cradle.
Out of Range
1) The transmitter will alert you with Audible warning beeps (two tone) and the In-Use LED will blink in
red.
2) Move closer to the receiver base and the link will be re-established once you return to normal
range. The In-Use LED will light constant green when link is back to normal operation.
3) If the link is not re-established within 30 seconds, the transmitter and receiver will return to standby
mode.
4) If you went out of range in Standby mode, or the unit reverted to standby mode, re-enter normal range
and press the In-Use button. Operation will return to normal.
5) If you will be out of range for a long period of time, turn the bodypack off.
Low Battery Warning
1) If the transmitter Low BATT indicator (red) starts flashing or you hear warning beeps, return the
transmitter to its cradle on the receiver to fully charge the transmitter.
2) The Charge LED indicator will light constant green when the unit is fully charged.
EMG Panic Button (if wired for use in your vehicle)
1) The EMG or Panic Button can be programmed to do many things but may not be connected in your
vehicle. Check with your technical department to understand what this button will control before you use
it.
2) In Record mode: Press the EMG button on the transmitter, a beep will sound and the relay will be
triggered at the receiver.
3) In Standby mode: Press the EMG button on the transmitter, a beep will sound, the green In-Use
indicator will blink and the relay will be triggered at the receiver.
Disabling the Beep Sound On the Transmitter
1) All of the audible beep signals on the transmitter can be disabled by setting the BEEP switch to the
off position.
Record Trigger (if video recording equipment supports)
1) The Record trigger feature is used to turn on recording whenever the video recorder is turned on.
Some video record units can be triggered by other events (lights and siren being turned on etc.) and
ensures the microphone starts recording at the same time.
The transmitter must be turned on and in standby mode.
2) A +12V signal on the line means the microphone is Record off.
3) 0V or ground on the line turns on the microphone is Record on.

2. INSTALLATION
PIN DESCRIPTION OF THE BASE OUTPUT PORT
Connector wire (RJ45)
Pin #1 : Transmitter Audio out
Pin #2 : In Car Mic. Audio out
Pin #3 : 12V DC_IN
Pin #4 : Ground
Pin #5 : Record Trigger OUT
Pin #6 : Record Trigger IN
Pin #7 : Panic Trigger Out
Pin #8 : In Car Mic. Trigger IN
Terminated Connector ( Optional )
Type A
1) Wire the un-terminated signal wires to the control unit according to the signal chart. 5 Amp fast
blow fuse is recommend in the 12VDC power supply line to protect the equipment.
2) Plug the 3.5mm stereo plug into the audio input jack of the recording device.
3) If it is to be used, plug in the in-car microphone into the In-Car Mic jack in the side of the receiver
base.
4) Turn on the transmitter and place it in the charging cradle with the beltclip facing out. The Charge
LED will light if there is power. If the LEDs do not come on, check the connections and repeat.
Description Position
Audio Ground Sleeve
Transmitter Audio Ring
Inside Car Mic. Audio Tip
8
1
8
1

Type B
Wire the un-terminated signal wires to the control unit according to the signal chart. A 5 Amp fast blow fuse is
recommend in the 12VDC power supply line to protect the equipment.
Type C
Wire the un-terminated signal wires to the control unit according to the signal chart. A 5 Amp fast blow fuse is
recommend in the 12VDC power supply line to protect the equipment.
1) Plug the 3.5mm stereo plug into the audio input jack of the recording device.
2) If it is to be used, plug in the in-car microphone into the In-Car Mic jack in the side of the receiver
base.
3) Turn on the transmitter and place it in the charging cradle with the beltclip facing out. The Charge
LED will light if there is power. If the LEDs do not come on, check the connections and repeat.
Installation is complete. Refer to Operation Section for more information.
3. GUIDELINES AND RECOMMENDATIONS FOR BEST PERFORMANCE
Compatibility
The transmitter and receiver must synchronize to work together (see Synch process on page 3). The synch
operation only needs to be performed the first time a system is used, or when a new bodypack is used with a
base previously synched to another bodypack. Do not synch multiple times, just once until a new
bodypack is used. Any Base can be synchronized with any Transmitter.
Description Position
Audio Ground Sleeve
Transmitter Audio Ring
Inside Car Mic. Audio Tip
Pin #1 : Transmitter Audio out
Pin #2 : In Car Mic. Audio out
Pin #3 : 12V DC_IN
Pin #4 : Ground
Pin #5 : Record Trigger Out
Pin #6 : Record Trigger IN
Pin #7 : Panic Trigger Out
Pin #8 : In Car Mic. Trigger IN
8
1

Using Multiple Wireless Systems
The WPM900 system has 100 possible “channels” that are really different frequency hopping schemes.
Potential Sources of Interference
There are many potential sources of interference for your wireless system. Any electronic product that
contains digital circuitry including digital signal processors (reverb/multi-effects units), electronic keyboards,
digital lighting controllers, CD and DVD players, and computers, all emit RF energy that can adversely affect
the performance of your wireless system. It is always best to place the receiver as far away as possible from
these devices to minimize potential problems.
The WPM900 operates in the 900MHzISM band and other devices in that band may interfere. The spread
spectrum technique used in the WPM900 is very robust and should operate even in the presence of other
900MHz devices such as walkie-talkies, LANs, cordless phones, etc. in the area.
Battery Recommendations
The Lithium-Ion battery built into the WPM900 transmitter will work at full capacity for over 500 charge cycles.
If you notice lower than usual battery life over time, it may be time to replace the cell
Warnings
Do not use this product in or near water, i.e. near a bathtub, sink, or swimming pool.
Do not use this product in the vicinity of a gas leak or to report a gas leak.
4. TROUBLE SHOOTING GUIDE
Problem Possible Causes Solutions
No audio and no In-Use LED
light on the receiver when
Transmitter is on and In-use Receiver is not powered Make sure that the power
supply is properly connected
Transmitter and receiver not
synchronized
Turn on transmitter and place
In recharge cradle. Press the
In-use button until the In-Use
LEDs flash 3 and the fair will
be synched
No(or low) Audio with all in-Use
LEDs solid green Lapel Microphone not connected
or positioned properly Check the mic. connection and
Placement of the microphone
Receiver audio output cable is
Damaged or disconnected Connect, repair or replace
cable
Interference Another 900MHzdevice in the
Area causing interference
Push the In-Use button and
the PWW24 will automatically
select a clear channel. If the
interference is too strong,
this may not completely
eliminate it.
Shot range or drop-outs RF reflective metal obstacles
between the transmitter and
receiver
Move the obstacles, or
reposition the receiver if
possible
In-Use LED on bodypack
flashes red and two tone
beep sounds Transmitter is out of range Move closer to the receiver
Variable sync times or failure
to synch Synch process run more than
one time with same pair Power cycle the base station
and Synch one time.
5. TECHNICAL SPECIFICATIONS
RECEIVER BASE STATION
Controls
Video Trigger Active +12/GND
Indicators
INUSE LED: GREEN
CHARGE LED : CHARGING -> RED
FULL CHARGED -> GREEN
RECORD LED GREEN FLASHING
Connections
In Car Mic. 2.5mm Mono Plug
Un-terminated Cord
RED +12V DC Power
BLUE Record Trigger out (Record on =DC12V, OFF= GND)
YELLOW Inside MIC Trigger IN (Ground to enable, OFF=12V)
ORANGE POWER GROUND
BLACK AUX (Panic) Trigger out (+12V when EMG is pushed, OFF=GND)
GRAY RECORD TRIGGER IN (GND= RECORD LED ON, +12V DC REC LED OFF)
Audio Connector
Tip Inside Car Mic
Ring Transmitter Audio
Sleeve Audio Ground
RF Specifications
Frequency Range: 902.5-927MHz
Number of Channels: 50 possible Diversity:
Internal antenna Receiver Type:
FHSS
RF Sensitivity:
-102 +/-3 dBm
FCC type acceptance: Approved Part 15
Audio Specifications
Frequency Response:
200 ~ 10000Hz +/- 3 dB Audio
Output Level: 3.6Vp-p
Distortion: Less than 2% Signal to
Noise Ratio:
> 40 dB Dynamic
Range: > 50 dB
General Specifications
Range 1000feet typical Power
Supply: External 12 VDC Current
Draw: 190mA Typical
Size: 2.75in x 2.99in x 3.15in
(70mm x 76mm x 80mm)
Weight 233 g
Transmitter
Controls
On/Off Switch
Beep On/Off Switch
In Use Button Emergency
Button
Indicators
Red LED low battery indicator/Emergency indicator
Yellow LED In Use
Battery Internal Li-ion 3.7V/1300mAh cell
Battery Life 8 hours In Use with full charge
7days Standby
Battery Recharge Time 3.5 hours from full discharge
Antenna Internal
2.5mm Mic Connector Tip Signal, Sleeve Ground
Secondary Microphone Internal
RF Output 20 ~ 40 mW (typical)
Size
2.5 in. x 1.8 in. x 0.94 in.
64 mm x 46 mm x 24 mm
Weight 74 g

6. FACTORY SERVICE ( NORTH AMERICA )
If factory service is required, ship the unit prepaid in its original carton to:
Enclose a note describing the problem along with any other pertinent information and how to contact you
7. WARRANTY( Limited )
ISV Wireless mic products are guaranteed against malfunction due to defects in materials or workmanship for a specified
period, as noted in the individual product-line statement(s) below, or in the individual product data sheet or owner's
manual, beginning with the date of original purchase. If such malfunction occurs during the specified period, the product
will be repaired or replaced (at our option) without charge. The product will be returned to the customer prepaid via UPS
Ground. Exclusions and Limitations: The Limited Warranty does not apply to: (a) exterior finish or appearance; (b)
certain specific described in the individual product-line statement(s) below, or in the individual product data sheet or
owner's manual; (c) malfunction resulting from use or operation of the product other than as specified in the product data
sheet or owner's manual; (d) malfunction resulting from misuse or abuse of the product; or (e) malfunction occurring at
any time after repairs have been made to the product by anyone other than Electro-Voice or any of its authorized service
representatives. Obtaining Warranty Service: To obtain warranty service, the customer must deliver the product,
prepaid, to ISV together with proof of purchase of the product in the form of a bill of sale or receipted invoice. Incidental
and Consequential Damages Excluded: Product repair or replacement and return to the customer are the only
remedies provided to the customer. ISV shall not be liable for any incidental or consequential damages including, without
limitation, injury to persons or property or loss of use. Other Rights (United States Only): This warranty gives you
specific legal rights and you may also have other rights, which vary from state to state
8. ACCESSORIES AND PARTS
Police Wireless WPM900T/R
Model DESCRIPTION
WPM900T
WPM900R
EXA90-10
PWC-90
PLM-90
WPM900-IM
Transmitter with internal microphone, battery, belt clip
Receiver and recharge station, RJ45 cable
External ANT – 10Feet
Optional TX Charger Base for WPM900T
Lapel Microphone
WPM900R In Car Microphone