B+K precision 1045B Manuale utente

TELEPHONE

PRODUCT

TESTER

U.S.

Patent

No.

4,577,072

TEST INSTRUMENTSAFEN

WARNING

An electrical shockcausing 10milliampsof current to pass through the heart will stop most human heartbeats. Voltage as low as

volts dc or

acrms should be considered dangerous and hazardous since it can produce alethal current under certain conditions. Higher voltages pose an even greater

threat because such voltage can more easily produce a lethal current. Your normal work habits should include all accepted practices that will prevent

contact with exposed high voltage, andthat will steercurrent away from your heart in caseof accidental contact with ahigh voltage. You will significantly

reduce the risk factor if you know and observe the following safety precautions:

Do not insert fingers or any metal objects into either TELEPHONE

TEST

JACK.Whenever tester is on.

VDC is present at thejacks. Also, ringing

voltages of

Vrms (LOW) or 100V rms (NORMAL)are present atTELEPHONE

TEST

JACK

#1,

the telephone cord, and the telephone during the

ring test. If telephone cord insulation is cracked, nicked, split, or any bare wire is exposed, the cord should be replaced immediately to prevent electrical

shock. Do not operate this or any other electrical equipment with protective covers removed. Voltages of

325

VDC and 120VAC are present inside the

Model

1045B

TelephoneProductTester; servicing of this orany other electrical instrument should be performed only by qualified electronics technicians

trained to work in the presence of high voltage.

TABLE

CONTENTS

Page

TEST INSTRUMENT SAFETY

..........

inside front cover

INTRODUCTION

..........................

.....

FEATURES

.....................

...

SPECIFICATIONS

.........................

CONTROLS AND INDICATORS

.................

...................

OPERATING INSTRUCTIONS

.............................

CordTest

Dial Test

...................

...

........

Telephone Light Test

.......................

Ring Test

.............................

Voice Level Test

.........................

Voice Quality Test

........................

1.5

Two-Line Telephone Test

....................

Cordless TelephoneTest

.....................

Answering Machine Test

.....................

FaxMachineTest

.........................

Page

.................

Automatic Telephone Dialer Test

........

The Telephone Product Tester As A Demonstrator 18

...

TELEPHONE TROUBLESHOOTING CONSIDERATIONS

..................

BLOCK DIAGRAM ANALYSIS 20

..........................

MAINTENANCE 23

........................

Opening The Tester 23

.........................

Fuse Replacement

.....................

Line VoltageConversion 23

...................

Pulse Dial Leakage Jumper 23

............................

Calibration 24

........................

Closing The Tester

.............

WARRANTY SERVICE INSTRUCTIONS 29

................

LIMITED ONE-YEAR WARRANTY 30

.............

MOUNTING THE INSTRUCTION CARD 31

INTRODUCTION

The

B+K

PRECISION

Model

10458

TelephoneProduct Tester per-

forms a wide variety of golno-go tests on standard and cordless tele-

phones (both pulse and tone dial), two-line telephones, answering

machines, fax machines, and automatic dialers. It can be operated by a

non-technical person interested in finding out if a problem is caused by

the telephone product or the telephone system.

The Telephone Product Tester checks the telephone's cords, ringing

mechanism, dialing mechanism,mouthpiece, earpiece, and audioampli-

fier.

second telephone is not necessary for the testing of a telephone,

but a second telephone jack is supplied for the testing of fax machines

and answering machines.

Many telephone problems occur because of a faulty cord; therefore,

it is advisable to test cords first.

any cord is found to be defective, the

other tests should still be carried out after replacing the defective cord.

It is advisable to perform all tests on each telephone product tested.

This tester verifies performance of telephone products to be used in

normal operating telephone systems. Occasionally, due to variations in

telephone systems, a telephone might check out good on this tester yet

still fail to work with the telephone system to which it is connected. If

this happens, a substitute telephone can be used to verify that the

telephone system is operating or the

B+K

PRECISION

Model

1042

Telephone Line Analyzer can be used to test the telephone line.

FEATURES

TESTS ALL TELEPHONE PRODUCTS: RINGTEST:

Checks corded telephones, cordless telephones, two-line telephones, Two ringer levels selectable: NORMAL and LOW (worst case). LOW

answering machines, fax machines, and automatic dialers. level is approximately the minimum value that the telephone company

guarantees; NORMAL level is the typical level.

COMPLETETESTING:

Goodhad indication for every function of standard telephone

VOICE LEVELTEST:

Indicatorlightswhen voicelevelmeets or exceedsminimumacceptablelevel.

SINGLETELEPHONE NEEDED: POLARITYTEST:

Only the telephone being tested is needed for all telephone tests. Tests automatic polarity circuit in telephone.Assures that telephone will

work if polarity of telephone line is reversed.

EASYTO USE:

Consumeroriented to allow unsupervised use by customers. Instructions

TEST:

are short and easy to follow.For familiarsounds,tester provides dial tone testing every

andring signalthat are identical to those suppliedby telephone exchange.

SECONDTELEPHONE CAPABILITY:

CORDTEST:

Permits voice quality of telephone to be checked when a second tele-

phone is available. Fax machines and answering machines can also be

Checksfor shorts, broken orintermittent conductors,and badconnectors. tested.

DIALTEST: TELEPHONE LIGHTTEST:

Decodes dialing signals for both pulse and tone dial telephones and Power is applied to telephone jack to test operation of the internal light

indicates number dialed. Slow sequence display releases approximately in a "Princess" type telephone or any telephone with abuilt-in light.The

two numbers/second so that even rapidly dialed numbers can be easily power is applied to the light only when the SINGLEIAUX switch is in

read. Can also test Redial and Memory dial function of telephone. For the SINGLE (out) position and the telephone being tested is connected

tone dial telephones, indicator lights when level is sufficient. to TELEPHONE TEST JACK 1.

SPECIFICATIONS

GENERAL

TelephoneLine Simulation:

Single or two telephone operation.

DC LineVoltage:

V +15%, 1.5

k!2

Source Impedance

Current:

nominal (off hook).

Auxiliary Line Voltage:

5 to

VAC, 60

tooperate light in telephone.

Polarity Test Switch:

Reverses telephone line polarity with momentary switch.

SingleIAux(Two-Line)Switch:

Permits testing two-line telephones

Voice/Dial Level Indicator:

Illuminates for levels greater than 0.1 V rms.

CordTests:

Tests both telephone line and handset 2-wire

and

4-wire modular

cords for shorts or continuity.

Reset:

Setsdisplay to

"0"

and removes dial tone when activated. Shuts off

ring signal when activated.

RING SOURCE

Frequency:

Hz.

RingFrequencyAccuracy

+.I%

Voltage

selectablelevels):

Low

rms 25%; Normal

100 V rms 25%; with lREN

(ringer equivalent number) load.

Ring SineWave Purity

Distortion 510%; with IREN load

Off-HookDetection:

DC line voltage less than

volts inhibits ring.

Ring Cycle:

After pushbutton selection of voltage level; approx.

seconds on,

4 seconds off.

AUTOMATIC NUMBER IDENTIFICATION

DTMF (DualTone MultipleFrequency):

Tolerance:

Accepts tones within +1.5% of nominal.

Tone Duration For Identification:

50m Sec minimum.

SPECIFICATIONS

Interdigit Time:

50m Sec minimum.

AmplitudeResponse (CompositeTone):

0.25

rms (-10 dBm).

ROTARY DETECTION:

Rate:

8 to 20 pulseslsec.

BreakTime:

30m Secminimum.

MakeTie:

15mSec minimum.

InterdigitTime:

315m Sec minimum.

RecognitionTime (endof digit):

lOOm Secminimum.

PulseDialing Leakage Detect:

(On- Hook)

Preset to 1

On-Hook Impedance). User selectable to

2 mA, 3 mA, 4 mA, or

mA via internaljumper.

Manual Dialing (pulsetype and DTMF):

Detects and decodes number dialed by telephone under test.

AutomaticDialer and Redial:

Pulse me:

Verifies numbers dialed.

DTMF:

Uses a delay circuit to verify numbers dialed with

rates up to I0 digitslsecond. Digits are displayed

at a rate of 2lsecond for easy verification.

DISPLAY

Single 0.43"

segment LED. Delay feature for high speed dialer.

Display blanks momentarily to mark display update.

TONE CHARACTERISTICS

Dial Tone:

352 Hz and 440

nominal.

Dial Tone Accuracy:

+I%.

Dial Tone Amplitude(s):

0.05

rms nominal.

Ringback Tone:

440 Hz and 20 Hz.

Ringback ToneAmplitude:

0.026 V rms nominal.

OPERATINGTEMPERATURE:

0" to +50°C.

POWER:

100, 120,220,240VAC +lo%,50160 Hz,

VA.

PHYSICAL SIZE:

HWD (3-318"x 10-318"

11-7/16") (8.6cm

26.4cm x 29.1 cm).

WEIGHT:

4.4 Pounds (2 kg).

CONTROLSAND INDICATORS

AUX

REV

Figure

Controls And Indicators

CONTROLSAND INDICATORS

Refer to Fig. I

POWER Switch.

Switches tester

and

OFE

DIALED NUMBER DISPLAY.

Single-digit display. Indicates

when power is applied to the tester. Indicates number telephone

actually dialed. Display blinks briefly each time a new digit is

displayed.

LOW RINGER LEVELIRESETButton.

Rings telephone under

test at low voltage level. Shuts off ring signal if ringing has been

initiated. Resets DIALED

NUMBER

DISPLAY circuitry and

causes a "0" to be displayed. Also turns off dial tone.

NORMAL RINGER LEVEL Button.

Rings telephone under test

at normal voltage level.

POLARITY NORMIREV Test Button.

Reverses polarity to test

telephone's steering diodes.

6.. SINGLEIAUX Button.

Selects main or auxiliary line in two-line

telephones.

TELEPHONE TEST JACK

#2.

Input for second telephone for

testing answering machines and voice quality.

TELEPHONE TEST JACK

#I.

Input for telephone product to be

tested.

VOICEIDIALLEVEL OK Indicator.

Lights when dialing tone is

above minimum level. Lights on voice peaks when level is above

minimum required level.

10.

HANDSET CORD TEST Jacks.

Inputs for testing detachable

handset cord.

11.

AUX LINEIndicator.

Indicates condition of two auxiliary wires in

detachable cord. The two auxiliary wires carry power to a light in

certain telephones, and a second telephone line in two-line tele-

phones.

12. SINGLE LINE Indicator.

Indicates condition of two main tele-

phone wires in detachable cord. For most telephones, only two

phone wires are used.

13.

TELEPHONE

CORD

TEST Jacks.

Inputs for testing detachable

telephone cord (telephone to wall).

OPERATING INSTRUCTIONS

dla

p-.

TELEPHONE PRODUCT TESTER

Ill,

~--

Ill

RINGER LEVELS

DISPLAY NORMAL

TELEPHONECORD 'OR'

TESTS

HANDSETCORD

TUEPHONE

TEST

JACKS

POWER

SINGLE

AUX

LlNE LlNE

Note: Insert only one

cord

time.

Figure

Cord

Test

Set

Up.

Indice

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