Telex Headphones PW24 User Manual

PW24  
2.4GHZ WIRELESS SYSTEM FOR  
POLICE VIDEO RECORDING  
USER GUIDE  
Revision B  
Page 1 of 8  
3/29/06  
 
QUICK SET UP AND OPERATION  
Synching Up The Transmitter and 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  
beltclip facing out.  
2) The recharge LED will light (Green if fully charged, Red if charging) and the  
In-Use Green LED on the base and transmitter will flash 3 times.  
3) The transmitter and base are now synched and will continue to be until  
another transmitter is linked to that base or the base is powered down.  
Normal Operation  
4) With the transmitter synched up, remove it from the cradle, plug in the lapel  
microphone (if used) and place the transmitter on your belt.  
5) To start the recording, press the In-Use button and the In-Use LED will light a  
constant green and you will hear a short beep  
6) To end recording, press the In-Use button and the In-Use LED will turn off  
and you will hear a short beep.  
7) At the end of your shift turn the transmitter off and replace it in the charging  
cradle.  
Out of Range  
8) If you use the Transmitter too far away from the Receiver during recording,  
the transmitter will alert you with Audible warning beeps (two tone) and the  
In-Use LED will blink in red.  
9) 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.  
10) If the link is not re-established within 30 seconds, the transmitter and receiver  
will return to standby mode.  
11) 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.  
12) If you will be out of range for a long period of time, turn the bodypack off.  
Low Battery Warning  
13) 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.  
14) The Charge LED indicator will light constant green when the unit is fully  
charged.  
EMG Panic Button (if wired for use in your vehicle)  
15) 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.  
16) In Record mode: Press the EMG button on the transmitter, a beep will sound  
and the relay will be triggered at the receiver.  
17) 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.  
Revision B  
Page 3 of 8  
3/29/06  
 
INSTALLATION  
1. 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.  
Audio In  
12 FT  
Description  
Color  
Red  
Power +12V DC  
Microphone Trigger  
Black  
(Ground = Transmitter On)  
Left Channel (Ground to  
enable Inside Microphone)  
Un-terminated wires  
Yellow  
Power Ground  
Orange  
AUX (Panic) Trigger  
12V+ DC Output when EMG  
button is pushed  
White  
2. Plug the 3.5mm stereo plug into the audio input jack of the recording device.  
Description  
Position  
Tip  
Inside Car Mic Audio  
Transmitter Audio  
Audio Ground  
Sleeve  
Ring  
Ring  
Sleeve  
Tip  
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 and the In-Use LED will flash three times. If these lights do not  
come on, check the connections and repeat.  
Installation is complete. Refer to Operation Section for more information.  
Revision B  
Page 4 of 8  
3/29/06  
 
4) Guidelines and recommendations for best performance.  
Compatibility  
The transmitter and receiver must synchronize to work together by placing the transmitter into the  
charging cradle while on. The In-Use LEDs will flash three times and the two are synchronized.  
Any PR24 can be synchronized with any PB24 base.  
Using Multiple Wireless Systems  
The PW24 system has 40 possible “channels” that are really different frequency hopping  
schemes. Each synchronized base and transmitter will automatically find a clear channel so up  
to 40 systems can work together in one location depending on other interference problems.  
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 PW24 operates in the 2.4MHz ISM band and other devices in that band may interfere. The  
spread spectrum technique used in the PW24 is very robust and should operate even in the  
presence of other 2.4MHz devices such as walkie-talkies, LANs, cordless phones, etc. in the  
area.  
Battery Recommendations  
The Lithium-Ion battery built into the PB24 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.  
Revision B  
Page 5 of 8  
3/29/06  
 
5) 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. In-Use  
LEDs should flash 3 times and  
the pair will be synched  
No (or low) Audio with all In-  
Use LEDs solid green  
Lapel Microphone not connected Check the mic connection and  
or positioned properly  
placement of the microphone  
Receiver audio output cable is  
damaged or disconnected  
Connect, repair or replace  
cable  
Interference  
Another 2.4GHz device in the  
area causing interference.  
Push the In-Use button and  
the PW24 will automatically  
select a clearer channel. If the  
interference is too strong, this  
may not completely eliminate  
it.  
Short 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 beltpack flashes Transmitter is out of range  
red and two tone beep sounds  
Move closer to the receiver.  
Revision B  
Page 6 of 8  
3/29/06  
 
PR24 RECEIVER BASE STATION  
Indicators  
INUSE LED:  
GREEN  
CHARGE LED :  
CHARGING -> RED  
FULL CHARGED -> GREEN  
Connections  
In Car Mic  
2.5mm Mono Plug  
Un-terminated Cord  
RED  
+12V DC Power  
BLACK  
WHITE  
YELLOW  
Microphone Trigger (Ground = Transmitter On)  
AUX (Panic) Trigger (+12V when EMG is pushed)  
Left Channel (Inside Mic)  
ORANGE  
Power Ground  
Audio Connector  
Tip  
Inside Car Mic  
Transmitter Audio  
Audio Ground  
Ring  
Sleeve  
RF Specifications  
Frequency Range:  
Number of Channels:  
Diversity:  
2.4GHz  
40 possible  
Internal antenna  
Receiver Type:  
RF Sensitivity:  
DSSS  
-102 +/-3 dBm(I,Q signal level at -3dB point))  
FCC type acceptance: Approved under Part 15  
Audio Specifications  
Frequency Response: 200 ~ 3400Hz +/- 3 dB  
Audio Output Level:  
Distortion:  
3.6Vp-p  
Less than 2%  
Signal to Noise Ratio: > 40 dB  
Dynamic Range:  
General Specifications  
Range  
Power Supply:  
Current Draw:  
Size:  
> 50 dB  
800 feet typical  
External 12 VDC  
190mA Typical  
2.75in x 2.99in x 3.15in  
70mm x 76mm x 80mm  
233 g  
Weight  
PB24 Bodypack Transmitter  
Controls  
On/Off Switch  
In Use Button  
Emergency Button  
Indicators  
Red LED  
low battery indicator/Emergency indicator  
Yellow LED  
In Use  
Battery  
Battery Life  
Internal Li-ion 3.7V/1300mAh cell  
8 hours In Use with full charge  
14days Standby  
Battery Recharge Time  
Antenna  
3.5 hours from full discharge  
Internal  
2.5mm Mic Connector  
Tip  
Signal  
Sleeve Ground  
Internal  
30 ~ 40 mW (typical)  
2.5 in. x 1.8 in. x 0.94 in.  
64 mm x 46 mm x 24 mm  
74 g  
Secondary Microphone  
RF Output  
Size  
Weight  
Revision B  
Page 7 of 8  
3/29/06  
 
Factory Service (North America)  
If factory service is required, ship the unit prepaid in its original carton to:  
Telex Audio Service  
c/o Telex Communications  
8601 East Cornhusker Highway  
Lincoln, NE 68507-9702 U.S.A.  
Tel: 402/467-5321 or 800-553-5992  
Fax: 402/467-3279  
Enclose a note describing the problem along with any other pertinent information and how to contact you.  
Warranty (Limited)  
Telex 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 Telex  
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. Telex 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.  
Telex 2.4GHz Wireless Systems are guaranteed against malfunction due to defects in materials or workmanship for a  
period of one (1) year from the date of original purchase. The Limited Warranty does not extend to cables or cable  
connectors. Additional details are included in the Uniform Limited Warranty Statement. Technical Assistance: 800-392-  
3497(U.S. and Canada only)  
ACCESSORIES AND PARTS  
Police Wireless PW24  
Model  
DESCRIPTION  
Part #  
One PB24 transmitter and one PR24 receiver, no  
PW24  
302039001 microphone  
Bodypack transmitter with internal microphone,  
PB24  
302039002 internal Li-ion battery cell, belt clip, no microphone  
Receiver and recharge station, un-terminated  
302039003 connection cable  
PR24  
TC-24  
302039004 Optional TX Charger Base for PB24  
KT24-ML 302039007 Lapel Microphone for PB24  
PW24-MI 302039005 In Car Microphone  
Revision B  
Page 8 of 8  
3/29/06  
 

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