Telex PW24ND User manual

Revision A Page 1 of 10 6/ 24 /09
2.4GHZ WIRELESS SYSTEM FOR
POLICE VIDEO RECORDING
USER GUIDE

Revision A Page 2 of 10 6/ 24 /09
TABLE OF CONTENTS
1. Quick S et Up and Operation ....................................................... 3
2. Component Details ....................................................................... 5
3. Installation .................................................................................... 6
4. Guidelines For Best Performance ................................................ 7
5. Troubleshooting Guide ................................................................ .8
6. Technical Specifications ............................................................... 9
7. Service and Warranty ................................................................... 10
8. Components and Accessories ..................................................... 10

Revision A Page 3 of 10 6/ 24 /09
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
ano ther 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) Make certain the Master/Slave switch on the side of the transmitter is in the
Master (M) position.
2) Turn the tr ansmitter 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.
3) 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 In - Use button on the transmitter and hold for 5 seconds (or until
you hear beeps if the beep is enabled to confirm synch), then release the
button.
4) The transmitter and base are now synched and will continue t o 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) To start the recording, press the In - Use but ton and the In - Use LED will light a
constant green and you will h ear a short beep or feel a short vibration.
3) To end recording, press the In - Use button and the In - Use LED will turn off
and you will he ar a short beep or feel a vibration .
4) At the end of your s hift turn the transmitter off and replace it in the charging
cradle .
Two Transmitter Operation on One Base
1) If one of the transmitters to be used with the base is already set to Master
and syn ched to the base, skip to step 5 .
2) Set the Master/Slave switch on one of the transmitters to Master (M) , put the
BEEP switch to BEEP and turn the power switch to ON . Then place the
transmitter in the recharge cradle of the base.
3) Press the In - Use button on the transmitter and hold for 5 seconds or until you
hear a bee p , then release the button.
4) The Master transmitter is now synched to the base.
5) On the second transmitter, place the Master/Slave switch in the Slave (S)
position.
6) Turn on the power and place the BEEP switch to BEEP and place the
transmitter in the recharge cradle.
7) Press and hold the In - Use button for 5 seconds or until you hear a beep.
8) Both transmitters are now ready for use with this base. The master
transmitter will control the video trigger relay and either will be able to trigger
the Emergency relay.
Low Battery Warning
1) If the transmitter Low BATT indicator (red) starts flashing or you hear warning
beeps (or vibrations) , 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.

Revision A Page 4 of 10 6/ 24 /09
Out of Range
1) If you use the Transmitter too far away from the Receiver during recording,
the transmitter will alert you with a udible warning beeps (two tone) (or feel
vibrations) and the In - Use LED will blink in re d.
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.
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 wi ll control before you use it.
2) In Record mode: Press th e EMG button on the transmitter, a beep will sound
(or vibration) and the relay will be triggered at the receiver .
3) In Standby mode: Press the EMG button on the transmitter , a beep will
sound (or vibrat ion) , t he green In - Use indicator will blink and the relay will be
triggered at the receiver.
Disabling the Beep Sound On the Transmitter
1) The Beep mode can be changed to vibrate mode by placing the BEEP switch
to Vibrate ( Vib ).
2) All of the audible beep sig nals and vibrations on the transmitter can be
disabled by setting the BEEP switch to the off position.
Auto Talk (if video recording equipment supports)
1) The Auto Talk feature is used to turn on the microphone 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 Auto Talk ensures the
microphone starts recording at the same time. The transmitter must be
turned on and in standby mode.
2) A +5V signal on the Auto Talk line means the microphone is off.
3) 0V or ground on the Auto Talk line turns on the microphone

Revision A Page 5 of 10 6/ 24 /09
COMPONENT DETAILS
PR24N D RECEIVER
Controls, Connectors and Details
1. In - Car Microphone Input
2. Control and Audio Cable
3. In - Use LED (Green)
4. Charge L ED (Red or Green)
5. Video Trigger Relay Signal Switch(Ground or +12V DC)
PB 24N D TRANSMITTER
Controls, Connectors and Details
1. Belt Clip
2. BEEP Switch (BEEP, Vibrate (VB), or OFF)
3. Ma ster/Slave Switch (M or S)
4. In Use Button
5. In - Use LED (Red or Green)
6. Low Battery LED (Red)
7. EMG Emergency Button
8. Microphone Input (1.5mm Jack)
9. Built in Microphone
10. Power Switch (ON or OFF)
1
2
3
4
5
1
2
3
9
5
4
6
7
8
10

Revision A Page 6 of 10 6/ 24 /09
INS TALLATION
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.
Description Color
Power +12V DC Red
Video Trigger
(Ground = Transmitter On)
Bl ue
Left Channel (Ground to enable
Inside Microphone)
Yellow
Power Ground Orange
AUX (Panic) Trigger
12V+ DC Output when EMG
button is pushed
Black
Auto Talk Trigger
5V+ DC to 0V to turn on mic
0V to 5V+DC to turn off mic
Brown
12 FT
Un - terminated wires
Audio In

Revision A Page 7 of 10 6/ 24 /09
2. Plug the 3.5mm stereo plug in to 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 LED s do not come on, check the
connections and repeat.
Installation is complete. Refer to Ope ration Section for more information.
4) Guidelines and recommendations for best performance.
Compatibility
The transmitter and receiver must synchronize to work toget her (see Synch process on page 3) .
The synch operation only needs to be perform ed 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 PR24 ND can be synchronized with any
PB24 N or PB24ND .
Usi ng Multiple Wireless Systems
The PW24 ND system has 95 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 loca tion 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 poss ible from these devices to minimize potential problems.
The PW24 ND operates in the 2.4MHz ISM band and other devices in that band may interfere.
The spread spectrum technique used in the PW24 N is very robust and should operate even in the
presence of oth er 2.4MHz devices such as walkie - talkies, LANs, cordless phones, etc. in the
area.
Battery Recommendations
The Lithium - Ion battery built into the PB24 N transmitter will work at full capacity for over 500
charge cycles. If you notice lower than usual ba ttery life over time, it may be time to replace the
cell.
Description Position
Inside Car Mic Audio
Tip
Transmitter Audio
Ring
Audio Ground
Sleeve
Sleeve
Ring
Tip

Revision A Page 8 of 10 6/ 24 /09
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.
5 ) Trouble Shooti ng 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 pair will
be synched
No (or low) Audio with all In -
Use LEDs solid green
Lapel Microphone not connected
or positioned properly
Check the mic connec tion and
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 twice
and the PW24 ND will
automatica lly 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
red and two tone beep sounds
Transmitter is out of range Move closer to the receiver.
Variable synch times or failure
to synch
Synch process run more than
one time with same pair
Power cycle the b ase station
and Synch one t ime.

Revision A Page 9 of 10 6/ 24 /09
PR24 ND RECEIVER BASE STATION
Controls
Video Trigger Active +12/GND
Indicators
IN- USE LED: GREEN
CHARGE LED : CHARGING - > RED
FULL CHARGED - > GREEN
Connections
In Car Mic 2 .5mm Mono Plug
Un - terminated Cord
RED +12V DC Power
BL UE Microphone Trigger (Ground or 12VDC = Transmitter On)
BLACK AUX (Panic) Trigger (+12V when EMG is pushed)
YELLOW Left Channel (Inside Mic)
ORANGE Power Ground
BROWN Auto Talk (5V = mic off, 0V = mic on)
Audio Conn ector
Tip Inside Car Mic
Ring Transmitter Audio
Sleeve Audio Ground
RF Specifications
Frequency Range: 2.4GHz
Number of Channels: 95 possible
Diversity: Internal antenna
Receiver Type: Fast Frequency Hopping
RF Sensitivity: - 102 +/ - 3 dBm(I,Q signal level at - 3dB point))
FCC type acceptance: Approved under Part 15
Audio Specifications
Frequency Response: 200 ~ 40 00 Hz +/ - 3 dB
Audio Output Level: 3.6Vp -p
Distortion: Less th an 2 %
Signal to Noise Ratio: > 40 dB
Dynamic Range: > 50 dB
Gener al Specifications
Range 10 00 feet typical in line of sight
Power Supply: External 12 VDC
Current Draw: 190mA Typical
Size: 2.75 in x 2.99 in x 3.15 in
70 mm x 76 mm x 80 mm
Weight 233 g
PB24 ND Bodypack Transmitter
Controls On/Off Switch
Beep On - Vibra te - Off Switch
Master/Slave Switch
In Use Button
Emergency Button
Indicators
Red LED low battery indicator /Emergency indicator
Yellow LED In Use
Battery Internal Li - ion 3.7V/1 2 00mAh cell
Battery Life 8 hours In Use with full charge
14days Standby
Battery Recharge Time 3.5 hours from full discharge
Antenna Internal
1.5mm Mic Connector Tip Signal, Sleeve Ground
Secondary Microphone Internal
RF Output 30 ~ 40 mW (typical)
Size : 2.5 in. x 1. 8 in. x 0.94 in.
64 mm x 46 mm x 2 4 mm
Weight 74 g

Revision A Page 10 of 10 6/ 24 /09
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, a s
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 repl aced (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 individua l 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 servic e, 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 c ustomer 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 give s 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 origin al 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 ND
Model
Part #
DESCRIPTION
PB24 ND PRD 00018003
Bodypack transmitter with internal microphone,
internal Li- ion battery cell, belt clip, no microphone
PR24 ND PRD 0001800 2
Receiver and recharge station, un - terminated
connection cable
TC - 24 302039004 Option al TX Charger Base for PB24 ND
KT 24 - ML 302039007 Lapel Microphone for PB24 ND
PW24 - MI 302039005 In Car Microphone