communications lab manual
DESCRIPTION
Analog Communications lab manualTRANSCRIPT
Printed in Canada
|3026866000511H~
Analog CommunicationsVolume 1
Instrumentation
Student Manual26866-00
Printed in Canada
|3026866000511H~
Analog CommunicationsVolume 1
Instrumentation
Student Manual26866-00
AB
ANALOG COMMUNICATIONSVOLUME 1
INSTRUMENTATION
bythe Staff
ofLab-Volt Ltd.
Copyright © 1990 Lab-Volt Ltd.
All rights reserved. No part of this publication may be reproduced,in any form or by any means, without the prior written permissionof Lab-Volt Quebec Ltd.
Legal Deposit – Fourth Trimester 1984
ISBN 2-89289-044-6
FOURTH EDITION, JUNE 1987
Printed in CanadaNovember 2005
Performing the Communications CoursewareUsing the Latest Versions of the Dual Function Generator
and True RMS Voltmeter / Power Meter
XI
A. Dual Function Generator, Model 9402-00 versus Model 9402-10
Completion of the exercises in this manual requires a Lab-Volt Dual FunctionGenerator, Model 9402-00 or 9402-10. These two models provide the same signals,but have different front panel controls. The manipulations in the hands-on exercisesof the Communications courseware have been written for the Model 9402-00 DualFunction Generator. If you perform the exercises using the Model 9402-10 DualFunction Generator, please take note of the following differences between the frontpanel controls of these two models of the Dual Function Generator (refer to Figures1 and 2 which show the front panels of the two models).
1. The display of the Model 9402-10 Dual Function Generator not only indicatesthe frequency of the signal produced by channel A or B (as on theModel 9402-00 Dual Function Generator), but also various settings related tothis channel.
2. The A and B channel-selection push buttons on Model 9402-00 are replacedwith a single A/B selection push button on Model 9402-10. The A/B selectionpush button allows selection between channels A and B of the Dual FunctionGenerator. The other channel is selected whenever the A/B button isdepressed. The function, frequency range, and attenuator settings of theselected channel are indicated in the display of the Model 9402-10 DualFunction Generator. When displayed, these settings can be modified using theFUNCTION, FREQUENCY RANGE, and ATTENUATOR push buttons
3. The sine-wave, square-wave, triangle-wave, sawtooth-wave, and pulseFUNCTION selection push buttons of channels A and B on Model 9402-00 arereplaced with a single FUNCTION selection push button on Model 9402-10, thatis common to both channels. The FUNCTION selection button is used inconjunction with the A/B channel selection push button to select the function ofeach channel. The function selected is indicated by a symbol in the display ofthe Model 9402-10 Dual Function Generator.
4. The 100-Hz, 1-kHz, 10-kHz, and 100-kHz FREQUENCY RANGE selection pushbuttons of channels A and B on Model 9402-00 are replaced with a singleFREQUENCY RANGE selection push button on Model 9402-10, that iscommon to both channels. The FREQUENCY RANGE selection button is usedin conjunction with the A/B channel selection push button to select thefrequency range of each channel. The frequency range selected is indicated inthe display of the Model 9402-10 Dual Function Generator.
5. The 0-dB, 20-dB, and 40-dB ATTENUATOR selection push buttons ofchannels A and B on Model 9402-00 are replaced with a single ATTENUATORselection push button on Model 9402-10, that is common to both channels. TheATTENUATOR selection button is used in conjunction with the A/B channelselection push button to select the attenuator of each channel. The attenuatorselected is indicated in the display of the Model 9402-10 Dual FunctionGenerator.
Performing the Communications CoursewareUsing the Latest Versions of the Dual Function Generator
and True RMS Voltmeter / Power Meter
XII
A
FUNCTION
B
A
B
MAX.MIN.
OUTPUTS
POWER
40
B
A
AHz
kHz
SYNC. / TTLOUTPUTS
A
HzFREQUENCY RANGE
FREQUENCY MODULATION
B
B
0
B
DEVIATION
BMAX.MIN.
INPUT
10 k1 k100
B
100 k
(CHANNEL A)A A A
ATTENUATORdB
MAX.MIN.
20
FREQUENCY
DUAL FUNCTION GENERATOR9402-00OUTPUT FREQUENCY
OUTPUT LEVEL
6. The control knobs used to set the durations of the pulse signals of channels Aand B are referred to as the PULSE DURATION control knobs on theModel 9402-10 Dual Function Generator.
7. Independent FREQUENCY and OUTPUT LEVEL control knobs for channels Aand B are still provided. However, their positions on the front panel havechanged.
8. When the frequency is set to 100.00 kHz or more, the display on theModel 9402-10 Dual Function Generator does not flash as is the case on theModel 9402-00 Dual Function Generator.
Figure 1. Front panel of the Dual Function Generator, Model 9402-00.
Performing the Communications CoursewareUsing the Latest Versions of the Dual Function Generator
and True RMS Voltmeter / Power Meter
XIII
DUAL FUNCTION GENERATOR9402-10
DURATION
B
A
B
AFREQUENCY
PULSE
MIN. MAX.
MIN. MAX.
MIN. MAX.
OUTPUT
A A
B B
FREQUENCY RANGE
ATTENUATORFUNCTION
A/B
POWER
LEVEL
(OUTPUT A)FREQUENCY MODULATION
DEVIATIONINPUT
OUTPUTSSYNC. / TTLOUTPUTS
B
A
SELECTS BETWEEN THESINE-WAVE, SQUARE-WAVE,
TRIANGLE-WAVE, SAWTOOTH-WAVEAND PULSE FUNCTIONS A OR B
CHANNELSELECTS
AND SETTINGS ASSOCIATEDWITH THE SELECTED CHANNEL
DISPLAYS THE FREQUENCYSELECTS BETWEENTHE 100-Hz, 1-kHz,
10-kHz, AND 100-kHzFREQUENCY RANGES
SELECTS BETWEENTHE 0-dB, 20-dB,
AND 40-dBATTENUATORS
CONTROLKNOBS
FREQUENCYDURATION
PULSE
CONTROLKNOBS
(CHANNELS A AND B) (CHANNELS A AND B)
CONTROLKNOBS
LEVELOUTPUT
(CHANNEL A)
DEVIATIONCONTROL KNOB
MODULATIONFREQUENCY
Figure 2. Front panel of the Dual Function Generator, Model 9402-10.
Performing the Communications CoursewareUsing the Latest Versions of the Dual Function Generator
and True RMS Voltmeter / Power Meter
XIV
SCALECHANGE
dBm
dBm27 7 13 33
RANGEmV
10 100V
1 10
MODEVOLTINPUT
1 Mæ
TRUE RMS VOLTMETER / POWER METER
[ 0 dBm = 1mW in 50 æ ]
9404-00
POWER
53
100
ZERO ADJUST
B. True RMS Voltmeter / Power Meter, Model 9404-00 versus Model 9404-10
Completion of the exercises in this manual requires a Lab-Volt True RMSVoltmeter / Power Meter, Model 9404-00 or 9404-10. These two models are verysimilar except for a few minor changes. The manipulations in the hands-onexercises of the Communications courseware have been written for theModel 9404-00 True RMS Voltmeter / Power Meter. If you perform the exercisesusing the Model 9404-10 True RMS Voltmeter / Power Meter, please take note ofthe following differences between these two models of the True RMS Voltmeter /Power Meter (refer to Figures 3 and 4 which show the front panels of the twomodels).
1. The 100 V (+53 dBm) range on the Model 9404-00 True RMS Voltmeter /Power Meter is not available on the Model 9404-10, True RMS Voltmeter /Power Meter. This range is not required to complete the hand-on exercises inthis manual.
2. A ZERO ADJUST knob is provided on the Model 9404-00 True RMS Voltmeter /Power Meter to manually zero the unit before taking measurements. There isno ZERO ADJUST knob on the Model 9404-10 True RMS Voltmeter / PowerMeter, because zero adjustment is performed automatically by the unit. An LEDon the front panel of the Model 9404-10 True RMS Voltmeter / Power Meterlights up whenever zero adjustment is performed.
Figure 3. Front Panel of the True RMS Voltmeter / Power Meter, Model 9404-00.
Performing the Communications CoursewareUsing the Latest Versions of the Dual Function Generator
and True RMS Voltmeter / Power Meter
XV
SCALECHANGE
ADJUSTINGZERO
POWER (dBm)
dBm27 7 13 33
RANGEmV
10 100V
1 10
MODEVOLTAGE (V)INPUT
1 Mæ
TRUE RMS VOLTMETER / POWER METER
[ 0 dBm = 1mW in 50 æ ]
9404-10
POWER
THE MAXIMUM RANGE IS10 V (+33 dBm) INSTEAD
OF 100 V (+53 dBm)LIGHTS UP WHENEVER ZERO
BY THE UNIT. THIS LED
ADJUSTMENT IS PERFORMED.
ZERO ADJUSTMENT IS NOWPERFORMED AUTOMATICALLY
Figure 4. Front Panel of the True RMS Voltmeter / Power Meter, Model 9404-10.
XVI
XVII
XVIII
ANALOG COMMUNICATIONS –VOLUME 1INSTRUMENTATION26866-00First Edition: June 1987Printed: November 2005
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