TEXAS RANGER TR-936 User manual

401 W. 35th Street, Suite B

National City , CA 91950

(800)446-5778. FAX(619)426-3788

Email : [email protected]

http : //www.rangerusa.com

Printed In Malaysia

AT6960A11A

PD000619

TR-936

SOLID STATE CITIZENS BAND

AM MOBILE TRANSCEIVE R

OWNER’S MANUAL

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12Alternate Microphone And Installation . . . . . . . . . . . . . . . . . . .

11Procedure to Receive And Transmit . . . . . . . . . . . . . . . . . . . . .

10Frequency Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CHAPTER 3

6Public Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6External Speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5Tuning The Antenna for Optimum SWR . . . . . . . . . . . . . . . . . .

4Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4Ignition Noise Interference . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3Mounting The Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CHAPTER 2

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CHAPTER 1

PAGE

TABLE OF CONTENTS

LIMITED WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . Inside Back Cover

(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE)

300 to 2500 HzAudio Response

100 mV for 10 dB Change in Audio OutputAGC Figure of Merit

More than 65 dBImage Rejection

2W at 10% THDAudio Power Output

< 0.5uVSquelch Sensitivity

< 0.5 uVSensitivity for 10 dB (S+N)/N

RECEIVER

DynamicMicrophone

300 to 2500 HzFrequency Response

10%Audio Distortion

-55 dBSpurious Emission

4WRF Power Output

TRANSMITTER

5.0 lbs.Weight

7 7/8" (W) x 9 1/4" (D) x 2 3/8" (H)Size

50 OhmsAntenna Impedance

13.8V DCInput Voltage

-30OC to +50OCTemperature Range

0.001%Frequency Stability

Phase-Lock-Loop (PLL) SynthesizerFrequency Control

AMEmission

26.965 - 27.405 MHzFrequency Range

GENERAL

CHAPTER 1 SPECIFICATIONS

- 2 -- 1 -

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CHAPTER 2 INSTALLATION

LOCATION

Plan the location of the transceiver and microphone bracket before starting the

installation. Select a location that is convenient for operation and does not

interfere with the driver or passengers. In automobiles, the transceiver is

usually mounted below the dash panel with the microphone bracket beside it.

MOUNTING THE RADIO

The transceiver is supplied with a universal mounting bracket. When mounting

the bracket and radio to your car, make sure it is mechanically strong. Also,

provide a good electrical grounding connection to the chassis of the vehicle.

Proceed as follows to mount the transceiver :

1. After you have determined the most convenient location in your vehicle, hold

the transceiver with mounting bracket in the exact location desired. If

nothing will interfere with mounting it in the desired position, remove the

mounting bolts. Before drilling the holes, make sure nothing will interfere

with the installation of the mounting bolts.

2. Connect the antenna cable plug to the standard receptacle on the rear panel.

Most transceiver antennas are terminated with a type PL-259 plug and mate

with the ANT receptacle.

3. Connect the red DC power input wire (with the fuse) to +13.8V DC. This

wire extends from the rear panel. In automobile installation, +13.8V DC is

usually obtained from the accessory contact on the ignition switch. This

prevents the set being left on accidentally when the driver leaves the car and

also permits operating the unit without the engine running. Locate the

accessory contact on most ignition switches by tracing the power wire from

the AM broadcast receiver in the car.

4. Connect the black lead to -13.8V DC. This is usually the chassis of the car.

Any convenient location with good electrical contact (remove paint) may be

used.

5. Mount the microphone bracket on the right side of the transceiver or near the

transceiver, using two screws supplied. When mounting in an automobile,

place the bracket under the dash so that the microphone is readily accessible.

IGNITION NOISE INTERFERENCE

Use of a mobile receiver at low signal levels is normally limited by the

presence of electrical noise. The primary source of noise in automobile

installations is from the generator and ignition system in the vehicle. Under

most operating conditions, when signal level is adequate, the background noise

does not present a serious problem. Also, when extremely low level signals are

being received, the transceiver may be operated with vehicle engine turned off.

The unit requires very little current and therefore will not significantly

discharge the vehicle battery.

Even though the transceiver has ANL and NB controls, in some installations

ignition interference may be high enough to make good communications

impossible. The electrical noise may come from several sources. Many

possibilities exist as variations between vehicles require different solutions to

reduce the noise.

ANTENNA

A vertically polarized, quarter-wavelength whip antenna provides the most

reliable operation and greatest range. Shorter, loaded-type whip antennas are

more attractive, compact and adequate for applications where the maximum

possible distance is not required. Also, the loaded whips do not present the

problems of height imposed by a full quarter-wavelength whip.

Mobile whip antennas utilize the metal body of the vehicle as a ground plane.

When mounted at a corner of the vehicle they are slightly directional, in the

direction of the body of the vehicle. For all practical purposes, however, the

radiation pattern is non directional. The slight directional characteristic will be

observed only at extreme distances. A standard antenna connector (type

SO-239) is provided on the transceiver for easy connection to a standard

PL-259 cable termination.

If the transceiver is not mounted on a metal surface, it is necessary to run a

separate ground wire from the unit to a good metal electrical ground in the

vehicle. When installed in a boat, the transceiver will not operate at maximum

efficiency without a ground plate, unless the vessel has a steel hull.

Before installing the transceiver in a boat, consult your dealer for information

regarding an adequate grounding system and prevention of electrolysis between

fittings in the hull and water.

- 4 -- 3 -

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TUNING THE ANTENNA FOR OPTIMUM SWR

Since there is such a wide variety of base and mobile antennas, this section will

strictly concern itself to the various types of mobile adjustable antennas.

Because the antenna length is directly related to the channel frequency, it must

be tuned to resonate optimally on all channels of the transceiver.

Channel 1 requires a longer antenna than Channel 40 because it is a lower

frequency. Due to the various methods of adjusting antennas for proper S.W.R ,

we have chosen what we think is the optimum method :

A. Antenna with adjustable screws (set screws).

1. Start with the antenna extended and tighten the set screw lightly enough so

that the antenna can be lightly tapped with your finger for easy adjustment.

2. Set your transceiver to Channel 20. Press the PTT (push-to-talk) switch, and

tap the antenna (making it shorter). The S.W.R. meter will show a lower

reading each time the antenna is tapped. By continuing to shorten the

antenna, you will notice the S.W.R. reading will reach a low point and then

start rising again. This means that you have passed the optimum point for

Channel 20.

Extend the antenna a short distance and again follow the procedure above.

When the lowest point has been reached, switch to Channel 1 and then to

Channel 40 and compare S.W.R. readings. They should be almost equal.

NOTE

The proper setting is ach

ieved when the SWR is 1.5 or

below, and when it has the same reading for chann

els 1

and 40.

B. Antennas which must be cut to proper length

1. Follow the same procedure as above, but adjust the length by cutting in 1/8"

increments until a good match is obtained.

2. Be very careful not to cut too much at one time, as once it is cut, it can no

longer be lengthened.

3. The whip is easily cut by filing a notch all the way around and breaking the

piece off with pliers.

If your are having difficulties in adjusting your antenna, check the followings :

a. All doors must be closed when adjusting the antenna.

b. Make sure the antenna base is grounded.

c. Check your coaxial cable routing (it may be pinched when routed into the

car.)

d. Try a different location on your car (keeping in mind the radiation pattern

you wish.)

e. Is the antenna perfectly vertical ?

f. Try a different location in your neighborhood. Stay away from large metal

objects when adjusting (metal telephone or lamp post, fences, etc.)

NOTE

The transceiver will operate into an SWR of 2 to 1

indefinitely and sustain an SWR of 20 : 1 for a maximum

of 5 minutes at rated operating conditions .

EXTERNAL SPEAKER

The external speaker jack (EXT. SP.) on the rear panel is used for remote

receiver monitoring. The external speaker should have 8 ohms impedance and

be able to handle at least 4 watts. When the external speaker is plugged in, the

internal speaker is disconnected.

PUBLIC ADDRESS

To use the transceiver as a public address system, connect an external 8 ohms

speaker (4 watts minimum) to the PA. SP. jack located on the rear panel. Direct

speaker away from the microphone to prevent acoustic feedback. Physical

separation or isolation of the microphone and speaker is important when

operating the PA at high output levels.

- 5 - - 6 -

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CHAPTER 3 OPERATION

FRONT PANEL

1. MIC GAIN/ANF CONTROL : This is a multi

function switch which

controls both the gain to the microphone as well as the ANF (Advanced

Noise Filter). In the outer position, the switch controls the ANF which

improves the signal to noise ratio when receiving a marginal signal. When

the switch is in the inner position it controls the amount of gain to the

microphone.

2. ON/OFF VOLUME CONTROL :

Thi

s knob controls the volume and

power to the radio. To turn radio on, rotate the knob cloc

kwise. Turning the

knob further will increase the volume of the receiver.

3. SQUELCH CONTROL : This switch is used to eliminate background noise

being heard through the receiver which can be disturbing when no

transmission are being received. To use this feature, turn the switch fully

counterclockwise and then turn clockwise slowly until the background noise

is just eliminated. Further clockwise rotation will increase the threshold level

which a signal must overcome in order to be heard. Only strong signals will

be heard at a maximum clockwise setting.

4. RF GAIN CONTROL :

This control is used to reduce the gain of the RF

amplifier under strong signal conditions.

5. SWR CAL CONTROL :

This SWR CAL control allows the user to

calibrate the SWR meter.

6. S-RF/CAL/SWR

SWITCH :

In the S-RF position, the meter will indicate

the strength of the signal being received, as well as the relative RF output of

transmission. When calibrating the SWR meter, you need to put this switch

in the CAL position. To use the meter to measure the standing wa

ve ratio,

turn the switch to the SWR position.

7. DIMMER CONTROL :

This knob controls the level of brightness for the

meter lamp and channel display.

8. TONE CONTROL :

This control changes tone quality in rece

ive only. In

clockwise rotation, treble is increased and in counter clockwise rotation,

bass is increased.

9. CHANNEL SELECTOR :

This control is used to select a desired transmit

and receive channel.

10. FRONT PANEL METER :

The front panel meter allows the user to

monitor signal strength, RF output power and SWR level.

11. NB/ANL/OFF SWITCH : This is a three position switch. Move the switch

all the way up to activate the Noise Blanker (NB) and Automatic Noise

Limiter (ANL). The Noise Blanker is very effective in eli

minating repetitive

impulse noise such as ignition interference. When the switch is moved to the

middle position, only the Automatic Noise Limiter (ANL) is engaged. Move

the switch to the bottom position to turn off the ANL and NB.

12. PA/CB SWITCH :

Select the mode of operation. In the PA position, the

radio acts as public address amplifier. Your voice will come out of the

speaker that is plugged into the PA. SP. jack on the rear panel. The radio

does not operate when you are in the PA mode. In the CB position, the PA

function is disabled and the radio will transmit and receive on the speaker

that is connected.

13. R.B./OFF

SWITCH :

In the Roger Beep position, the ra

dio transmits an

audio tone at the end of your transmission to indicates that transmission has

ended. As a courtesy to others, use the Roger Beep only when necessary.

14. CH19/OFF SWITCH : The Channel 19 switch is used for instant access to

Channel 19, which is often used by truckers for transmission of traffic and

weather conditions.

15. TX/RX LED : The red LED indicates the unit is in the transmit mode. The

green LED indicates the unit is in the receive mode.

- 8 -- 7 -

RF GAIN SWR CAL

ANF

MIC GAIN

NB/ANL

ANL

OFF

CAL

OFF

S/RF SWR

R.B.

OFF

CH19

TX/RX

TONE

DIMMER

VOL SQ

OFF

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16. CHANNEL DISPLAY :

The channel display indicates the current

selected channel.

REAR PANEL

1. ANTENNA : This jack accepts 50 ohm coaxial cable with a PL-259 type

plug.

2. PA. SP. : This jack is used for PA operation. Before operating, you must

first connect a PA speaker (8 ohms, 4W) to this jack.

3. EXT. SP. : This jack accepts 4 to 8 ohms, 5 watts external speaker. When

the external speaker is connected to this jack, the built-in speaker will be

disabled.

4. F.C.: This connector is used for an external frequency counter which

indicates the frequency of the selected channel.

5. POWER : This accepts 13.8V DC power cable with built-in fuse. The

power cord provided with the radio has a black and red wire. The black goes

to negative and the red goes to positive.

FREQUENCY CHART

27.405 MHz4027.205 MHz20

27.395 MHz3927.185 MHz19

27.385 MHz3827.175 MHz18

27.375 MHz3727.165 MHz17

27.365 MHz3627.155 MHz16

27.355 MHz3527.135 MHz15

27.345 MHz3427.125 MHz14

27.335 MHz3327.115 MHz13

27.325 MHz3227.105 MHz12

27.315 MHz3127.085 MHz11

27.305 MHz3027.075 MHz10

27.295 MHz2927.065 MHz9

27.285 MHz2827.055 MHz8

27.275 MHz2727.035 MHz7

27.265 MHz2627.025 MHz6

27.245 MHz2527.015 MHz5

27.235 MHz2427.005 MHz4

27.255 MHz2326.985 MHz3

27.225 MHz2226.975 MHz2

27.215 MHz2126.965 MHz1

Channel FrequencyChannelChannel FrequencyChannel

This device complies with part 15 of the FCC Rules.

Operation is subject to the condition that this device

does not cause harmful interference.

Y2K020001

- 10 -

- 9 -

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PROCEDURE TO RECEIVE AND TRANSMIT

A. MICROPHONE

The receiver and transmitter are controlled by the push-to-talk switch on the

microphone. Press the switch and the transmitter is activated, release switch to

receive. When transmitting, hold the microphone two inches from the mouth

and speak clearly in a normal voice. The transceiver comes complete with a low

impedance dynamic microphone.

B. PROCEDURE TO RECEIVE

1. Be sure that power source, microphone and antenna are connected to the

proper connectors before going to the next step.

2. Turn VOL knob clockwise to apply power to the radio.

3. Set the VOL for a comfortable listening level.

4. Set the MODE switch to the desired mode.

5. Listen to the background noise from the speaker. Turn the SQ knob slowly

clockwise until the noise just disappears. The SQ

is now properly adjusted.

The receiver will remain quiet until a signal is actually received. Do not

advance the control too far or some of weaker signals will not be heard.

6. Set the CHANNEL selector switch to the desired channel.

7. Set the RF GAIN control fully clockwise for maximum RF gain.

C. PROCEDURE TO TRANSMIT

1. Select the desired channel of transmission

2. Set the MIC GAIN control fully clockwise.

3. If the channel is clear, depress the push-to-talk switch on the microphone and

speak in a normal voice.

ALTERNATE MICROPHONES AND INSTALLATION

For best results, the user should select a low-impedance dynamic type

microphone or a transistorized microphone. Transistorized type microphones

have a low output impedance characteristics. The microphones must be

provided with a four-lead cable. The audio conductor and its shielded lead

comprise two of the leads. The third lead is for transmit control and the fourth

is for receiving control.

The microphone should provide the functions shown in schematic below.

4 WIRE MIC CABLE

Receive Control4

Transmit Control3

Audio Lead2

Audio Shield1

Mic Cable LeadPin Number

Fig. 1 Your transceiver microphone schematic.

- 12 -- 11 -

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MEMO

Limited Warranty

Ranger Communication, Inc

. (Ranger)

warrants to the original purchaser

ONLY

this

product against defects in material or workmanship, as follows:

1. Ranger warrants the product to be free of defects in material or workmanship for a

period of one (1) year from the original date of purchase as shown on the original

purchaser's bill of sale,

receipted invoice, or other proof of purchase. After this period,

the original purchaser must pay for any labor at the prevailing rate either at an

authorized Ranger warranty repair facility or at the factory. In addition, Ranger will

supply, at no charge, new or rebuilt replacements for defective parts during the

warranty period.

2. In the event of a defect during the warranty period, Ranger shall, at its option, repair or

replace the defective product, or refund the purchase price of product. Such action shall

constitute the purchaser's exclusive remedy under this warranty.

3. A

Return Authorization Number

must be obtained from the Ranger Customer Service

Department before any returns for warranty repair will be accepted. Send the defective

product POSTAGE-PAID

, along with proof of the date of purchase

(photocopy of the

original invoice or receipt)

to:

401 W. 35th Street, Suite B

National City, CA 9 1950

TEL: (800) 446-5778, (619) 426-6440

FAX: (619) 426-3788

E-mail: [email protected]

4. This warranty does not cover cosmetic damage or damage due to acts of Gods,

accident, misuse, abuse, negligence, improper installation, UNAUTHORIZED

MODIFICATION, or any action in violation of the product's instruction manual. This

warranty is valid ONLY in the United States of America.

5. This warranty valid ONLY if the serial number appears on the product.

6. Ranger reserves the right to avoid a warranty or make reasonable charges for repair of

a product which displays evidence of misuse, abuse neglect, accident, or modification

of the basic design.

7. Warranties give you, the buyer, specific legal rights. You may also have other rights,

which may vary from state to state. This warranty is extended only to Ranger products

purchased and shipped to locations in the United States of America or its possessions.

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