GR25LTD Cobra GR 25 LTD ST CB Radio Instruction Manual

: June 13, 2024
: Cobra

Table of Contents

GR25LTD Cobra GR 25 LTD ST CB Radio
Product Information
Controls and Indicators
Included Accessories
Product Usage Instructions
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

GR25LTD Cobra GR 25 LTD ST CB Radio

Product Information

The Cobra GR 25 LTD ST is a CB Radio that is designed to provide
easier communication. It features the patent-pending SoundTrackerTM
technology, which cuts noise coming in and strengthens signals
going out. This technology dramatically improves the transmission
and reception of CB signals, resulting in cleaner and clearer
reception of signals and more powerful transmission for improved CB
communications. The radio also includes various controls and
indicators for easy operation.

Controls and Indicators

6-Pin Microphone Connector
Power On/Off/Volume
Squelch
Tone Control
RF Gain
Band Selector
Channel Selector
LED Channel Display
SoundTrackerTM LED
RX (Receive)/TX (Transmit) LED Indicator
SoundTrackerTM On/Off
Channel 19/Channel 9/Normal Switch
Dimmer Switch
CB/PA Switch
NB/ANL ANL/Off Switch
Signal Strength Meter
Microphone
Rear Panel:
- Public Address Speaker Jack
- External Speaker Jack
- Antenna Connector
- Power Jack

Included Accessories

No information about the included accessories is provided in the
given text.

Product Usage Instructions

Connect the 6-Pin Microphone to the designated connector on the
radio.
Turn the radio on/off and adjust the volume using the Power
On/Off/Volume control.
Adjust the squelch to eliminate unwanted background noise.
Use the Tone Control to adjust the tone of the audio
output.
Adjust the RF Gain to optimize reception sensitivity.
Select the desired band using the Band Selector.
Select the desired channel using the Channel Selector.
The LED Channel Display indicates the currently selected
channel.
The SoundTrackerTM LED indicates the status of the
SoundTrackerTM feature.
The RX/TX LED Indicator indicates whether the radio is in
receive or transmit mode.
Enable or disable the SoundTrackerTM feature using the
SoundTrackerTM On/Off control.
Switch between Channel 19, Channel 9, and Normal mode using the
Channel 19/Channel 9/Normal Switch.
Adjust the brightness of the display using the Dimmer
Switch.
Switch between CB and PA modes using the CB/PA Switch.
Enable or disable NB (Noise Blanker) and ANL (Automatic Noise
Limiter) using the NB/ANL ANL/Off Switch.
The Signal Strength Meter displays the strength of the received
signal.
Connect an external speaker or public address speaker to their
respective jacks on the rear panel if desired.
Connect an antenna to the antenna connector for proper signal
reception and transmission.
Connect the power jack to a suitable power source to provide
power to the radio.

Cobra Electronics Corporation 6500 West Cortland Street Chicago, IL 60707 USA www.cobraelec.com

2 GR 5 LT D ST
Operating Instructions for your Cobra GR 25 LTD ST CB Radio Bedienungsanleitung für lhr Modell Cobra GR 25 LTD ST CBFunkgerät Instructivo de uso de la radio de banda ciudadana (CB) Cobra GR 25 LTD ST Instructions d’utilisation du poste de radio CB GR 25 LTD ST de Cobra Istruzioni per l’uso del modello Cobra GR 25 LTD ST Radio CB

“Ingenious Products for Easier Communication.”

GR25LTDST-English copy 6/21/99 12:00 PM Page 37

Our Thanks to You

Thank you for purchasing the Cobra GR 25 LTD ST CB Radio .Properly used, this Cobra product will give you many years of reliable service.
SoundTracker TM
“Cuts noise coming in…strengthens signals going out.”
This pat ent -pending t echnology dram at ically im proves t ransm ission and recept ion of CB signals.

Cobra on t he World Wide Web: Frequently Asked Questions (FAQ) can be found on-line at: w w w .co b ra elec.co m

The revolutionary SoundTrackerTM System reconfigures the transmission signal,allowing it to be transferred more efficiently through cluttered air w aves.

At the same time, it significantly reduces the amount of static on all incoming CB signals.

The end result is a cleaner, clearer reception of signals and a more p owerful transmission,which dram at ically im prove CB com m unicat ions.

A3

GR25LTDST-English copy 6/21/99 12:00 PM Page 38

Controls and Indic ators

1. 6-Pin Microphone Connector

2. Power On/ Off/ Volum e

3. Squelch

4. Tone Control

5. RF Gain

6. Band Selector

7. Channel Selector

8. LED Channel Display

9 Sound TrackerTM LED

10. RX (Receive)/ TX (Transm it) LED Indicator

11. Sound TrackerTM On/Off

12. Channel 19/Channel 9/

Norm al Switch

1 6

13. Dim m er Switch

14. CB/PA Switch

15. NB/ANL ANL/Off Switch

16. Signal Strength Meter
1
17. Microphone

Rear Panel 18. Public Address Speaker Jack 19. External Speaker Jack 20. Antenna Connector 21. Power Jack

1 7

15 14 13 12 10 9 8
1 1

2 3 45 6

7

18 19

2 0

2 1

A2

Our Thanks to You

Thank you for purchasing the Cobra GR 25 LTD ST CB Radio. Properly used, this Cobra product will give you m any years of reliable servic e.
SoundTr acker TM
“Cuts noise coming in…strengthens signals going out.”
This pat ent -pending t echnology dram at ically im proves t ransm ission and recept ion of CB signals.

Cobra on t he World Wide Web: Frequently Asked Questions (FAQ) can be found on-line at: w w w .co b ra elec.co m

The revolutionary SoundTrackerTM System reconfigures the transmission signal,allowing it to be transferred more efficiently through cluttered air w aves.

At the same time, it significantly reduces the amount of static on all incoming CB signals.

The end result is a cleaner, clearer reception of signals and a more p owerful transmission,which dram at ically im prove CB com m unicat ions.

A3

GR25LTDST-English copy 6/21/99 11:59 AM Page 1

How to Use Your

Contents

Cobra GR 25 LTD ST

Section A (English) Features……………………………………………………………………………….1 Included Accessories………………………………………………………..A1 Controls & Indicators ……………………………………………………….A2 Our Thanks to You …………………………………………………………….A3
So u n d TrackerTM Installation
Lo cat io n ……………………………………………………………………………2 Mounting and Connection……………………………………………2 Antennas CB Ant enna……………………………………………………………………..6 Marine Installation………………………………………………………….6 Ignition Noise Interference ……………………………………………7 Operating Your GR 25 LTD ST Turning On Your CB………………………………………………………..8 Setting Channel Selector……………………………………………….9 To Receive ………………………………………………………………………..10 Selecting a Channel……………………………………………………….10 Selecting a Channel from Microphone……………………….11 S-M et er……………………………………………………………………………..11 SoundTrackerTM System…………………………………………………12 Activating SoundTrackerTM …………………………………………..13 NB, Off (Noise Blanker) Switch………………………………………14 Bright/ Mid/ Dim Switch………………………………………………….15 RF Gain Control……………………………………………………………….15 Setting Squelch……………………………………………………………….16 To Transmit………………………………………………………………………18 Setting Tone Control………………………………………………………19 Tran sm it ……………………………………………………………………………20 RF Meter…………………………………………………………………………..20 External Speaker……………………………………………………………..21 PA (Public Address)…………………………………………………………22 Temporary Mobile Set-Up ……………………………………………..24 Home And Office Set-Up ……………………………………………….25 How Your CB Can Serve You……………………………………………26 A Few Rules You Should Know ……………………………………..26 Local Laws or Regulations…………………………………………….27 CB 10 Codes…………………………………………………………………….28 Frequency Ranges…………………………………………………………….30 GR 25 LTD ST Specifications…………………………………………..31 Optional Accessories………………………………………………………..32 Deutsch ……………………………………………………………………..Abschnitt B Español………………………………………………………………………….Sección C Français…………………………………………………………………………Section D Italiano ………………………………………………………………………….Sezione E

Features of This Product · 40 Germ an FM Channels
40 European (CEPT) Channels 12 Germ an AM Channels
· SoundTracker TMSystem
· Heavy-Duty Dynam ic Microphone with Channel Changer
· Full 4 Watts RF Power Output
· Instant Channel 19 and 9
· Front Panel 6-Pin Microphone Connect or
· Switchable Noise BlankerAutom atic Noise Lim iter
· RF Gain
· PA Function
· 2.75-m etre (9-foot) Microphone Cord

1

GR25LTDST-English copy 6/21/99 11:59 AM Page 2

Installation

Loc ation

Location
Plan location of transceiver and microphone bracket before starting the installation.
Select a lo cation that is con venient for operation, yet does not interfere with the driver or passenger.
The transceiver is usually moun ted to the underside of the dash with the microphone bracket beside it.

Mounting and Connec tion
Note The transceiver is held in the universal m ounting bracket by two thum bscrews which allow for adjustm ent at a con venient angle.

Mounting and Connection
1 Hold the radio with the mounting bracket in the exact desired lo cation. If there is no in terference, remove the bracket and use it as a template to mark the lo cation for the mounting screw s.

The bracket includes t wo selftapping screws and star washers. The m ounting m ust be m echanically strong and conveniently located.

cb transceiver

3 Connect the an tenna cable plug to the receptacle marked “ANT” on the back of the unit.

2 Drill the holes and secure the bracket. 2

co n t i n u ed 3

GR25LTDST-English copy 6/21/99 11:59 AM Page 4

Installation

Note
Before installing the CB radio, visually check the vehicle’s battery connection to deter mine which terminal, positive or negative, is earthed to the engine block (or chassis). A negatively earthed vehicle has its negative lead earthed to the chassis.

Note
Connecting to a fuse circuit controlled by the ignition sw itch prevents the unit from being lef t on accidentally, and also perm its operating the unit w ithout running the engine.
Note In positive earth vehicles the red wire goes to the chassis and the black wire is connected to the ignition switch.

4 In a negative earthed vehicle,connect the red lead of the DC p ower cord to an accessory 12 volt fuse.
5 Connect the black lead to the negative side of the vehicle.This is usually the chassis. Any convenient location with a go od electrical contact (remove paint) may be used .

4

6 Plug power cable in to back of unit mar ked “Power”. Be sure to obser ve polarity mar kings.
7 Mount the microphone bracket on the right side of the unit (nearer the driver) using t wo screws supplied.Bracket should be placed under the dash so that microphone is readily accessible.
8 Attach the 6-pin microphone cable to receptacle on front of unit and Install unit in bracket securely.
5

GR25LTDST-English copy 6/21/99 11:59 AM Page 6

A ntennas

CB Antenna
Note For optim um perform ance in passenger cars the ideal antenna location is on the centre of the roof. Second choice is on the centre of the boot.
Note Antenna bracket m ust be earthed to the chassis of the vehicle.

CB Antenna
The antenna is critical in affecting transmission distance. Only a properly matched antenna system will allow maximum p ower output. Cobra loaded type antenna models are highly recom mended for most installations.
1 A standard an tenna connector is provided on the transceiver for easy connection.

Ignition Noise Interferenc e
Use of a m obile receiver at low signal levels is normally limited by the presence of electrical noise.The primary source of noise in cars is from the alternator and the ignition system. Typically, when signal level is adequate, the background noise does not present a serious problem. Also, w hen ext rem ely low -level signals are being received, the transceiver may be operated with t he vehicle’s engine t urned off.The unit requires very little current and therefore will not signifi cant ly discharge t he vehicle’s bat t ery.
Even though the Cobra GR 25 LTD ST has an automatic noise limiter, in some installations ignition interference may be high enough to make good communications impossible. Many possibilities exist and variations bet ween vehicles require different solutions. Consult your COBRA dealer or a 2-w ay radio technician for help in lo cating the source of a severe noise.

Marine Installation
The transceiver will not oper ate at maximum effi ciency in a boat without an earthing plate, (unless it has a steel hull). Before attempting installation , consult your dealer for information regarding an adequate earthing system and prevention of electrolysis bet ween fittings in the hull and w ater.

6

7

GR25LTDST-English copy 6/21/99 11:59 AM Page 8

Operation

Turning On

Turning On
Make sure the p ower cord, antenna and microphone are connected to their proper connectors before starting.

Setting Channel Selector

Operation
Setting Channel Selec tor

1 The CB/ PA button should be in the CB posit ion.

1 Select one of forty channels and adjust volum e. The select ed channel is indic at ed by the LED readout directly ab ove the channel selector knob

Setting Band M ode Selector

Setting Band Mode Selec tor

2 Rotate the On/ Off Volume knob clockwise to a normal listening level.
8

1 To operate in EU band , set control t o EU, to operate in DE band , set to DE, and to operate in AM band, select AM.
9

GR25LTDST-English copy 6/21/99 11:59 AM Page 10

Operation

To Rec eive

To Receive

Operation

Selecting A Channel from Microphone

Selec ting a Channel from Mic rophone

Selec ting A Channel

1 Rotate the On/ Off Volume knob clockwise. The green RX/ TX LED will be illuminated.
Selecting A Channel

Note
Switch to 9 or 19 (Inform ation) for instant access to these channels.

1 Channels can also be selected by pressing the UP and DOWN buttons on top of the microphone.To lock channel,press and release the LOCK button.

S-M et er
Sw ings proport ionately t o st rengt h of incom ing signal when receiving.

S- Meter

1 Switch to NOR to select desired channel.

10

11

GR25LTDST-English copy 6/21/99 11:59 AM Page 12

Operation

Note
SoundTrackerTM gives you clearer, cleaner reception to im prove CB com m unications while on the air.

The SoundTrackerTM System
While previous systems only “blanket out ” or limit noise in higher sound frequencies, the revolutionary new SoundTrackerTM System actually reduces noise while leaving the signal intact in the reception mode. In the transmission mode, it actually strengthens the signal,providing you with a significant reduction in noise on reception and transmission.
Sound clarity is measured by the ratio of the signal level to the noise level. The higher the signal-to-noise ratio, the better the sound.
How SoundTrackerTM Works
On Reception – “Cuts noise com ing in”
With a normal CB, distant signals fall below the squelch level and are unin telligible.With a SoundTrackerTM CB, the noise level is cut by up to 90%,which increases the signal-to-noise ratio and dram at ically im proves signal clarit y.This also allows you to reduce the squelch le vel significantly ,which greatly expands your listening range.
On Transm ission – “Strengthens signals going out ”
A SoundTrackerTM CB strengthens the transmit signal by more effectively using the available RF pow er out put of t he CB. The result is im pr oved transmission signal clarity and an expanded transmission range.

12

Activating SoundTrackerTM

Ac tivating SoundTrac kerTM

1 Push and release the ST button. Red LED is illuminated when SoundTrackerTM is turned on.

13

GR25LTDST-English copy 6/21/99 11:59 AM Page 14

Operation

NB/ANL, ANL,

NB/ANL,ANL, Off Switch

OFF (Noise

Blanker, Automatic

Noise Limiter

Switc h

Bright/Mid/Dim Switch

Operation
Bright/Mid/Dim Switc h

Note
The RF noise blanker is ver y effective in reducing repetitive noises such as ignition inter ference.

1 When switched to NB/ ANL position the RF Noise Blanker and Automatic Noise Limiter is activated, providing increased noise filtration.
2 When switched to the ANL the Automatic Noise Limiter is activ ated.This helps reduce noise creat ed by t he vehicle’s elect ronics.

When sw itched to OFF position Noise Blanking and Automatic Noise Limiting Filtration will be turned off.

14

1 Switch to BRT, MID or DIM to control brightness of t he channel indicat or and m ult i-function meter for day or nighttime driving .

RF Gain Control
The RF Gain is used to optim ize reception in strong or weak signal areas.

RF Gain Control

Not e The RF Gain is used to optim ize reception in weak signal areas.
1 Rotate the RF Gain knob anticlockwise to reduce gain in strong signal areas. In weak signal areas turn clockwise to increase gain.
15

GR25LTDST-English copy 6/21/99 11:59 AM Page 16

Operation

Setting Squelc h
Gate closed

Setting Squelch
Squelch is the “control gate” for incoming signals.

Operation
Gate set to Desired Squelch Setting (DSS)

Gate open

1 Full clockwise rotation closes the “gate” allowing only very strong signals to en ter.

3 To achieve the Desired Squelch Setting (DSS), turn the Squelch control anticlockwise until you hear noise. Now turn the control clockwise until the noise just stops. This is the DSS set t in g.

2 Full anticlockwise rotation opens the “gate” allow ing all signals in.

16

17

GR25LTDST-English copy 6/21/99 11:59 AM Page 18

Operation

To Transmit

Caution!
Be sure the antenna is proper ly connected to the radio before transm itting. Prolonged transm itting without an antenna,or with a poorly m atched antenna, can cause dam age t o the transm itter.

1 Select desired

channel.

Selec ting a Channel from Mic rophone

Selecting A Channel from Microphone

Setting Tone Control

Operation
Setting Tone Control

1 Tone Control is used to set the desirable tone level of received audio signals.

1 Channels can also be selected by pressing the UP and DOWN buttons on top of the microphone.To lock channel,press and release the LOCK button.

18

19

GR25LTDST-English copy 6/21/99 11:59 AM Page 20

Operation

Transmit RF Meter

Transmit
1 Push and hold microphone button to transmit. Transm it t er is now act iv at ed.When t ransm itting, hold the microphone t wo inches from your mouth and speak in a clear, normal voice. Release to receive.
RF Meter
This m et er sw ings proport ionat ely t o t he RF output (outgoing signal) while transmitting .

External Speaker
The external Speaker jack is used for remote receiver monitoring.

External Speaker

1 Connect an external speaker to the external speaker jack on the rear panel.

Note The external speaker should have 8-ohm im pedance and b e rated to handle at least 4 w atts. When the external speaker is plugged in,the internal speaker is autom atically disconnected.
Note Cobra ext ernal speakers are rated at 10 watts.

20

21

GR25LTDST-English copy 6/21/99 11:59 AM Page 22

Operation

PA (Public A ddress)

PA (Public Address)

Note
Speaker should have 8-ohm im pedance and be rated t o handle at least 4 w atts.

Note
The speaker should be direc ted away from the m icrophone t o prevent acoustic feedback.

1 Connect an external PA speaker to the PA jack on the rear panel.

Note
Adjust volum e control to norm al listening level. Activity on the CB channel w ill be heard through the PA speaker.

3 Push and hold microphone button and speak in a normal voice.Your voice will sound on the PA speaker.

2 Set CB/ PA switch to PA position.

22

23

GR25LTDST-English copy 6/21/99 12:00 PM Page 24

Temporary Mobile Set-Up

Temporary Mobile Operation
For temporary mobile oper ation you may want t o purchase an optional cigarette ligh ter adapter from your COBRA dealer.This adapter and a mag netic mount an tenna allow you t o “install” your transceiver quickly for temporary use.

Home And Offic e Set-Up

Base Station Operation (From 220/240V AC Domestic Current)
To operate your transceiver from home or offic e you w ill need a 13.8 volt DC Pow er Pack rated at a minimum of 2 amps, and a properly installed base station antenna.

Base Station Operation (From 220/240V AC Domestic Current)

Warning! Do not attem pt to operate this transceiver by connecting it directly to 220/ 240 V AC.

1 Connect the red (+) and black (-) leads of the transceiver to the cor responding terminals of the p ower pack.

2 Plug p ower cable in to back of unit mar ked “Power”. Be sure to observe polarity mar kings.
3 Connect properly installed and matched base station antenna.

24

25

GR25LTDST-English copy 6/21/99 12:00 PM Page 26

How Your CB Can Serve You

A Few Rules You Should Know

· Warn of traffic delays ahead · Provide weather and road information · Provide help in an emergency · Provide direct contact (subject to
conditions) with home or office · Get local information to find destination · Let you communicate with family and friends · Suggest spots to eat and sleep · Keep you alert while travelling
A Few Rules You Should Know
A. Conversations should not last more than 5 minutes with another station. A one minute break should be taken to let others use the channel.
B. You should not blast others off the air by use of illegally am plified t ransm it t ers or illegally high antennas.
C. You should not use the CB to promote illegal act ivit ies.
D. Bad language should not be used.
E. You should not transmit music with a CB.
F. You should not use your CB to sell merchandise or professional services.

Local Laws or Regulations
The use of this CB product involves the pub lic airways and its use may be subject to local law s or regulations. Before using the product you should check to see that the contemplated use does not violate any applicable local law or regulation.

Loc al Laws or R egulations

26

27

GR25LTDST-English copy 6/21/99 12:00 PM Page 28

How Your CB Can Serve You

CB 10-Codes

CB 10-Codes
Citizen Bands have adopted the “10-CODES” for standard questions and answers. These codes provide quick and easy communication,especially in noisy areas. Following are some of the mor e com m on codes and m eanings:

Code 10-1 10-2 10-3 10-4 10-5 10-6 10-7 10-8 10-9 10-10 10-11 10-12 10-13 10-16 10-17 10-18 10-19 10-20 10-21 10-22 10-23 10-24 10-25 10-26 10-27 10-28

Meaning Receiving p oorly Receiving well Stop transmitting OK,message received Relay message Busy, stand by Out of service, leaving air In service, subject to call Repeat message Transmission completed, standing by Talking too rapidly Visit ors present Advise weather/ road conditions Make pick-up at Urgent business Anything for us? Return to base My location is Call by phone Report in person t o Stand b y Completed last assignmen t Can you contact Disregard last information Moving to channel Identify your station

28

How Your CB Can Serve You
Code Meaning 10-29 Time is up for contact 10-30 Does not conform 10-33 Emergency traffic 10-34 Trouble at this station 10-35 Confidential information 10-36 Correct time is 10-37 Breakdown truck needed at 10-38 Ambulance needed 10-39 Message delivered 10-41 Turn to channel 10-42 Traffic accident at 10-43 Traffic delay at 10-44 Have a message for 10-45 All units within range please repor t 10-50 Break channel 10-60 What is next m essage num ber? 10-62 Unable to copy. Use phone 10-63 Net directed t o 10-64 Net clear 10-65 Awaiting your next message/ assignment 10-67 All unit s com ply 10-70 Fire at 10-71 Proceed, transmission in sequence 10-77 Negative contact 10-81 Reserve hotel r oom for 10-82 Reserve room for 10-85 My address is 10-91 Talk closer to mic 10-93 Check m y frequency on t his channel 10-94 Give me a long coun t 10-99 Mission completed, all units secure 10-200 Police needed at
29

GR25LTDST-English copy 6/21/99 12:00 PM Page 30

Frequenc y Ranges

The COBRA GR 25 LTD ST transceiver represents one of the most advanced FM two- way radios. This unit features advanced Phase Lock Loop (PLL) circuitry providing complete coverage of all 40 CEPT FM, 40 German FM and 12 AM CB channels.

CEPT Frequencies (EU)

German Frequencies (DE)

Channel

CB

Freq. CB

Freq.

Channel In MHz Channel In MHz

Channel

CB

Freq. CB

Freq.

Channel In MHz Channel In MHz

1

26.965 21

27.215 41

26.565 61

26.765

2

26.975 22

27.225 42

26.575 62

26.775

3

26.985 23

27.255 43

26.585 63

26.785

4

27.005 24

27.235 44

26.595 64

26.795

5

27.015 25

27.245 45

26.605 65

26.805

6

27.025 26

27.265 46

26.615 66

26.815

7

27.035 27

27.275 47

26.625 67

26.825

8

27.055 28

27.285 48

26.635 68

26.835

9

27.065 29

27.295 49

26.645 69

26.845

10

27.075 30

27.305 50

26.655 70

26.855

11

27.085 31

27.315 51

26.665 71

26.865

12

27.105 32

27.325 52

26.675 72

26.875

13

27.115 33

27.335 53

26.685 73

26.885

14

27.125 34

27.345 54

26.695 74

26.895

15

27.135 35

27.355 55

26.705 75

26.905

16

27.155 36

27.365 56

26.715 76

26.915

17

27.165 37

27.375 57

26.725 77

26.925

18

27.175 38

27.385 58

26.735 78

26.935

19

27.185 39

27.395 59

26.745 79

26.945

20

27.205 40

27.405 60

26.755 80

26.955

Channel

AM

CB

Freq.

Frequencies Channel In MHz

4

27.005

5

27.015

6

27.025

7

27.035

CB Channel
8 9 10 11

Channel Freq. In MHz
27.055 27.065 27.075 27.085

Channel

CB

Freq.

Channel In MHz

12

27.105

13

27.115

14

27.125

15

27.135

30

GR 25 LTD ST Spec ific ations

GENERAL

CHANNELS . . . . . . . . . . . . . . . . . . . . . . . 40 CH CEPT FM

40 CH GR FM

12 CH GR AM

FREQUENCY RANGE (CEPT FM). . . . . 26.965 TO 27.405 MHz

FREQUENCY RANGE (German) . . . . . 26.565 TO 26.955 MHz

FREQUENCY RANGE (German AM). . 27.005TO 27.135 MHz

FREQUENCY TOLERANCE. . . . . . . . . . 0.005 %

FREQUENCY CONTROL . . . . . . . . . . . . PLL (PHASE LOCK LOOP) SYNTHESIZER

OPERATING TEMPERATURE

RANGE. . . . . . . . . . . . . . . . . . . . . . . . . . . -20° C TO + 55° C

MICROPHONE . . . . . . . . . . . . . . . . . . . . PLUG-IN DYNAMIC

INPUT VOLTAGE . . . . . . . . . . . . . . . . . . 13.2VDC nom.(positive or negative earth)

CURRENT DRAIN

TRANSMIT: AM FULL MOD.,1.5A (MAXIMUM)

RECEIVE:SQUELCHED , 0.3A;FULL AUDIO

OUTPUT, 1.2A (NOMINAL)

SIZE

219 mm x 162 mm x 56 mm

(8-5/ 8″D X 6-3/ 8″W X 2-13/ 64″H)

WEIGHT . . . . . . . . . . . . . . . . . . . . . . . . . .1.8 kg (4 LBS.)

ANTENNA CONNECTOR . . . . . . . . . . . .UHF; SO-239

METER . . . . . . . . . . . . . . . . . . . . . . . . . . .ILLUMINATED;INDICATES RELATIVE

POWER OUTPUT, RECEIVED

SIGNAL STRENGTH

TRANSM ITTER POWER OUTPUT . . . . . . . . . . . . . . . . . .4 WATTS FM, 1 WATT AM MODULATION . . . . . . . . . . . . . . . . . . . .FM,AM FREQUENCY RESPONSE . . . . . . . . . . . .300 TO 3000 Hz OUTPUT IMPEDANCE . . . . . . . . . . . . . .50 OHMS,UNBALANCED

RECEIVER SENSITIVITY . . . . . . . . . . . . . . . . . . . . . . .LESS THAN 6 µV FOR 20 dB SINAD SELECTIVITY . . . . . . . . . . . . . . . . . . . . . .6 d B @7 kHz, 60 dB @10 kHz IMAGE REJECTION . . . . . . . . . . . . . . . . .80 dB,TYPICAL ADJACENT-CHANNEL REJECTION . . .60 dB,TYPICAL IF FREQUENCIES . . . . . . . . . . . . . . . . . .DOUBLE CONVERSION:1ST: 10.695 MHz
2ND:455 kHz AUTOMATIC GAIN CONTROL (AGC) .LESS THAN 10 d B CHANGE IN AUDIO
OUTPUT FOR INPUTS FROM 10 TO 50,000 µV RF GAIN RANGE . . . . . . . . . . . . . . . . . . .40 dB NOISE BLANKER . . . . . . . . . . . . . . . . . . .RF TYPE SQUELCH . . . . . . . . . . . . . . . . . . . . . . . . .ADJUSTABLE;THRESHOLD LESSTHAN 1 µV AUDIO OUTPUT POWER . . . . . . . . . . .4 WATTS FREQUENCY RESPONSE . . . . . . . . . . . .300 TO 3000 Hz DISTORTION . . . . . . . . . . . . . . . . . . . . . .LESS THAN 7% @3 WATTS @1000 Hz BUILT-IN SPEAKER . . . . . . . . . . . . . . . . .8 OHMS,5W EXTERNAL SPEAKER (NOT SUPPLIED) 8 OHMS;DISABLES INTERNAL SPEAKER
WHEN CONNECTED

PA SYSTEM POWER OUTPUT . . . . . . . . . . . . . . . . . .4 WATTS INTO EXTERNAL SPEAKER EXTERNAL SPEAKER FOR PA . . . . . . . .8 OHMS, 4 WATTS MINIMUM, (NOT SUPPLIED)

(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE)

31

GR25LTDST-English copy 6/21/99 12:00 PM Page 32
Optional Ac c essories

Optional Ac c essories

Replacement DC Power Cord For in-vehicle use

Replacement Mounting Bracket
For in-vehicle use

Replacement Thumb Screws For in-vehicle use

Replacement Microphone Bracket
For in-vehicle use

71 cm (28″) Full Range Centre Load, Magnetic Mount Antenna
For in-vehicle use AT 35

63.5 cm (25″) Glass Mount Antenna
For in-vehicle use AT 55

Dynamic External Speaker
For in-vehicle use CS 100

Noise Cancelling External Speaker
For in-vehicle use CS 300