Wavetek 132 User Manual

MODEL 132

VCG/NOISE

GENERATOR

@ -

1981 - Wavetek

THIS DOCUMENT CONTAINS INFORMATION PROPRIETARY TO WAVETEK AND IS SOLELY FOR INSTRUMENT OPERATION AND MAINTENANCE. THE INFORMATION IN THIS DOCUMENT MAY

NOT BE DUPLICATED IN ANY MANNER WITHOUT THE PRIOR

APPROVAL IN WRITING OF WAVETEK.

SAN DIEGO

9045 Balboa Ave., San Diego, CA 92123

P. 0 Box 651,

Tel 7141279-2200 TWX 91 O-335-2007

San

Diego, Calif. 92112

Manual Revision: 10181

Instrument Release: U-l 0180

CONTENTS

Section One

Section Two

Section Three CIRCUIT DESCRIPTION

Section Four

Section Five DATA PACKAGE

SPECIFICATIONS

Physical and Electrical Specifications

OPERATION

Inspection Operating Controls Operation

General Description

MAINTENANCE

Introduction

Recommended Test Equipment Checkout and Calibration Troubleshooting

Introduction

Recommended Spare Parts List

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3 4 7

13 13 13 16

SCOPE OF MANUAL

This manual contains instructions for operating, test- The Model 132 is a source of analog and digital

ing, and maintaining the Wavetek Model 132 Noise Generator. The Wavetek product-improvement waveforms. Noise outputs, or waveforms can program ensures that the latest electronic developments are incorporated into the Wavetek instruments by the brated signal-to-noise and noise-to-signal ratios to addition of circuit and component changes as rapidly as development and testing permit. Due to the time required to document and print this manual, it is not always possible to incorporate these changes into the manual. In this case, data will be found on engineering change sheets at the back of the manual. If there are no change sheets, the manual is correct as printed.

VCG/

SCOPE OF EQUIPMENT

as well as a precision source of sine, triangle and

individually, or combined to provide selectable, cali-

+60

dB. Waveforms can be varied over a frequency range of 0.2 Hz to 2 MHz. Length of the digital sequence is selectable to a maximum of Clock rates, variable from 160 Hz through 1.6 MHz, give added versatility to the noise generator. These clock rates allow selectable noise bandwidths variable from 10 Hz to 100 kHz.

noise,

square

be used

220 - 1 bits.

SAFETY

Thi s

instrument i s

ss earth grou n

bYPa

BEFORE PLUGGING IN the instrument, comply with installation instructions.

wire dfor earth g r ounding via the ding w

ith two wir eextension cords,

facil i ty powe r

adapter setc.

plug

wiring.

Do not

MAINT

ENANCE

shoul d

be don e

WARNING operations.

CAUTION notes call attention to possible equipment damage in subsequent operations.

may requir epower on w i th th e

only by qualif

notes call attention t o

ied

personne l aware

possible injury or death hazards i n

instrumen t

of the elect

cover s

rica l

h a

removed.

zards.

subsequent

SECTIO N

SPECIFICATIONS

VERSATILITY

Waveforms Sine and analog noise

Frequency Range of Signal

0.2 Hz to 2 MHz in 6 decade ranges

Ranges x10 Xl00 X1K X10K XIOOK X1M

Function Outputs Sine with 60 dB step attenuator in 10

lapping calibrated vernier;

20 V p-p into open circuit and 10 V p-p into

load from

Sync Output

Greater than 1 V p-p square wave into open circuit at

6OOa

DC Offset

V offset

from rear panel; peak amplitude limited by the dynam-

ic range of the amplifier output.

VCG

Frequency of the generator may be dc-programmed, or ac-modulated by external 0 to control circuitry is capable of 1000: 1 deviation. The

VCG amplifier has a 100 kHz bandwidth and a slew

rate of 0.1

result of the sum of the dial setting and the externally applied voltage.

Stability Short term

Long term Percentages apply to amplitude, frequency, and dc offset.

square

M.r

square f-l~

5Oa

source impedance.

output impedance.

(22.5

V offset into

Voltage Controlled Generator

V&s.

The instantaneous frequency is the

triangle

I-I

digital noise

and triangle

5Oa

output impedance,

5Ofi

+0.05%

+0.25%

waveforms

l-u--L

0.2 Hz to 20 Hz 2 Hz to 200 Hz 20 Hz to 2 kHz

200 Hz to 20 kHz 2 kHz to 200 kHz

20 kHz to 2 MHz

selectable,

steps and over-

5Oa

load) controlled

V signal. Voltage

for 10 minutes

for 24 hours

HORIZONTAL PRECISION

Dial Accuracy

*2%

of full scale, 1 Hz to 2 MHz

Frequency Vernier

One

turn equals 1% of full scale.

Time Symmetry

% through XIOOK range

VERTICAL PRECISION

Sine Wave Frequency Response Amplitude change with frequency less than:

from 0.2 Hz to 200 kHz

0.1 dB

from 0.2 Hz to 2 MHz

0.5

PURITY

Sine Wave Distortion

Less than:

0.5% on X10, X100,

1.0% on XIOOK range All harmonics 30

Square Wave Rise and Fall Time Less than 50 ns terminated into

NOISE

outputs Pseudo-random analog or digital noise with a maximum of 20 V p-p excursion (open circuit) with 60 attenuator in 10

vernier.

Sequence Lengths Push buttons on the front panel provide a sequence

length of

dB steps and overlapping calibrated

21° -

1, 215 - 1, or 220 - 1.

X1K, X10K

down on Xl MHz range

ranges

SOQ

step

lock

Noise C Switchselectable noise

Clock Frequency

OPERATIONAL MODES

FUNC form atthe main

S/N Signal-to-Noise operation adds noise to a selected signal of constant amplitude. The signal-to-noise ratio is variable from 0 to

N/S Noise-to-Signal operation adds a selected signal to a constant amplitude noise. The noise-to-signal ratio is variable from 0 to

FM Frequency Modulation - Provides random modulation of the frequency of the generator. The S/N

(dB)

quency deviation.

Frequency

160 Hz

1.6 kHz 16 kHz

160 kHz

1.6 MHz

Function

ratio control also controls the amount of fre-

frequencies

Mode

Provides the selected

output.

+60

dB.

+60

dB.

NOTE

are listed

Analog Noise

Bandwidth

10 Hz 100 Hz

1 kHz 10 kHz 100 kHz

N/S

ENVIRONMENTAL

Temperature All specifications listed, except stability, are for

*5’C.

For operation from

specifications by factor of 2.

MECHANICAL

Dimensions

incheswide,5% incheshigh,

Weight 8 Ibs net,

Power

105Vto125V

Less than 15 watts.

12 Ibs shipping

200

All

specifications apply for frequencies

obtained when dial is between 0.

2.0 and at 10 V p-p in to a 50 ohm load.

NOTE

O°C

250

55’C,

derate all

11%

inches deep

50Hzto400Hz.

and

25’C

When noise is added to the signal output, specifications apply up to 200 the square wave rise time is dera ted by

a factor of 10. In the clock range of

1.6 MHz, the maximum calibrated

to-noise ratio is 30

kHz

and

signal-

It is possible to stop the generator from oscillating by applying a negative VCG

voltage when the dial is already set at minimum frequency. VCG inputs up to 30 V will not permanently damage the

ins trumen t.

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