Communications Lab Manual

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Printed in Canada

|3026866000511H~

Analog Communications

Volume 1

Instrumentation

Student Manual 26866-00

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Printed in Canada

|3026866000511H~

Analog Communications

Volume 1

Instrumentation

Student Manual 26866-00

AB

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ANALOG COMMUNICATIONS VOLUME 1

INSTRUMENTATION

Legal Deposit – Fourth Trimester 1984

ISBN 2-89289-044-6

FOURTH EDITION, JUNE 1987

Printed in Canada November 2005

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Performing the Communications Courseware

Using 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 Function Generator, 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 exercises of the Communications courseware have been written for the Model 9402-00 Dual Function Generator. If you perform the exercises using the Model 9402-10 Dual Function Generator, please take note of the following differences between the front panel controls of these two models of the Dual Function Generator (refer to Figures 1 and 2 which show the front panels of the two models).

1. The display of the Model 9402-10 Dual Function Generator not only indicates the frequency of the signal produced by channel A or B (as on the Model 9402-00 Dual Function Generator), but also various settings related to this channel.

2. The A and B channel-selection push buttons on Model 9402-00 are replaced with a single A/B selection push button on Model 9402-10. The A/B selection push button allows selection between channels A and B of the Dual Function Generator. The other channel is selected whenever the A/B button is depressed. The function, frequency range, and attenuator settings of the selected channel are indicated in the display of the Model 9402-10 Dual Function Generator. When displayed, these settings can be modified using the FUNCTION, FREQUENCY RANGE, and ATTENUATOR push buttons

3. The sine-wave, square-wave, triangle-wave, sawtooth-wave, and pulse FUNCTION selection push buttons of channels A and B on Model 9402-00 are replaced with a single FUNCTION selection push button on Model 9402-10, that is common to both channels. The FUNCTION selection button is used in conjunction with the A/B channel selection push button to select the function of each channel. The function selected is indicated by a symbol in the display of the Model 9402-10 Dual Function Generator.

4. The 100-Hz, 1-kHz, 10-kHz, and 100-kHz FREQUENCY RANGE selection push buttons of channels A and B on Model 9402-00 are replaced with a single FREQUENCY RANGE selection push button on Model 9402-10, that is common to both channels. The FREQUENCY RANGE selection button is used in conjunction with the A/B channel selection push button to select the frequency range of each channel. The frequency range selected is indicated in the display of the Model 9402-10 Dual Function Generator.

5. The 0-dB, 20-dB, and 40-dB ATTENUATOR selection push buttons of channels A and B on Model 9402-00 are replaced with a single ATTENUATOR selection push button on Model 9402-10, that is common to both channels. The ATTENUATOR selection button is used in conjunction with the A/B channel selection push button to select the attenuator of each channel. The attenuator selected is indicated in the display of the Model 9402-10 Dual Function Generator.

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Performing the Communications Courseware

Using 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 A Hz kHz SYNC. / TTL OUTPUTS A Hz FREQUENCY RANGE FREQUENCY MODULATION B B 0 B DEVIATION B MAX. MIN. INPUT 10 k 1 k 100 B 100 k (CHANNEL A) A A A ATTENUATOR dB MAX. MIN. 20 FREQUENCY

DUAL FUNCTION GENERATOR

9402-00 OUTPUT FREQUENCY

OUTPUT LEVEL

6. The control knobs used to set the durations of the pulse signals of channels A and B are referred to as the PULSE DURATION control knobs on the Model 9402-10 Dual Function Generator.

7. Independent FREQUENCY and OUTPUT LEVEL control knobs for channels A and B are still provided. However, their positions on the front panel have changed.

8. When the frequency is set to 100.00 kHz or more, the display on the Model 9402-10 Dual Function Generator does not flash as is the case on the Model 9402-00 Dual Function Generator.

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Performing the Communications Courseware

Using the Latest Versions of the Dual Function Generator

and True RMS Voltmeter / Power Meter

XIII

DUAL FUNCTION GENERATOR

9402-10 DURATION B A B A FREQUENCY PULSE MIN. MAX. MIN. MAX. MIN. MAX. OUTPUT A A B B FREQUENCY RANGE ATTENUATOR FUNCTION A/B POWER LEVEL (OUTPUT A) FREQUENCY MODULATION DEVIATION INPUT OUTPUTS SYNC. / TTL OUTPUTS B A

SELECTS BETWEEN THE SINE-WAVE, SQUARE-WAVE, TRIANGLE-WAVE, SAWTOOTH-WAVE

AND PULSE FUNCTIONS A OR B CHANNEL

SELECTS

AND SETTINGS ASSOCIATED WITH THE SELECTED CHANNEL

DISPLAYS THE FREQUENCY

SELECTS BETWEEN THE 100-Hz, 1-kHz, 10-kHz, AND 100-kHz FREQUENCY RANGES SELECTS BETWEEN THE 0-dB, 20-dB, AND 40-dB ATTENUATORS CONTROL KNOBS FREQUENCY DURATION PULSE CONTROL KNOBS

(CHANNELS A AND B) (CHANNELS A AND B)

CONTROL KNOBS LEVEL OUTPUT (CHANNEL A) DEVIATION CONTROL KNOB MODULATION FREQUENCY

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Performing the Communications Courseware

Using the Latest Versions of the Dual Function Generator

and True RMS Voltmeter / Power Meter

XIV SCALE CHANGE dBm dBm 27 7 13 33 RANGE mV 10 100 V 1 10 MODE VOLT INPUT 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 RMS Voltmeter / Power Meter, Model 9404-00 or 9404-10. These two models are very similar except for a few minor changes. The manipulations in the hands-on exercises of the Communications courseware have been written for the Model 9404-00 True RMS Voltmeter / Power Meter. If you perform the exercises using the Model 9404-10 True RMS Voltmeter / Power Meter, please take note of the 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 two models).

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 in this 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 is no ZERO ADJUST knob on the Model 9404-10 True RMS Voltmeter / Power Meter, because zero adjustment is performed automatically by the unit. An LED on the front panel of the Model 9404-10 True RMS Voltmeter / Power Meter lights up whenever zero adjustment is performed.

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Performing the Communications Courseware

Using the Latest Versions of the Dual Function Generator

and True RMS Voltmeter / Power Meter

XV SCALE CHANGE ADJUSTING ZERO POWER (dBm) dBm 27 7 13 33 RANGE mV 10 100 V 1 10 MODE VOLTAGE (V) INPUT 1 Mæ

TRUE RMS VOLTMETER / POWER METER

[ 0 dBm = 1mW in 50 æ ]

9404-10

POWER THE MAXIMUM RANGE IS

10 V (+33 dBm) INSTEAD OF 100 V (+53 dBm)

LIGHTS UP WHENEVER ZERO BY THE UNIT. THIS LED ADJUSTMENT IS PERFORMED.

ZERO ADJUSTMENT IS NOW PERFORMED AUTOMATICALLY

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ANALOG COMMUNICATIONS –VOLUME 1 INSTRUMENTATION

26866-00

First Edition: June 1987 Printed: November 2005

We Value Your Opinion!

Please take a few minutes to complete this questionnaire. Your answers and comments will enable us to produce better manuals. Return it to the address on the reverse side of this page or ask your instructor to forward it.

How long are the exercises?

G Too long G Adequate G Too short Do the Discussions cover enough information?

G Too little G Acceptable G Too much How easy to follow are the Procedures?

G Too difficult G Adequate G Very easy How useful is the Procedure Summary?

G Of little use G Useful G Very useful How many hours were required per exercise?

G 1 G 2 G 3 or more

PUBLICATION ERRORS AND COMMENTS

Please enclose photocopies of pages where errors were found and indicate the modifications that should be carried out.

If you want to receive the corrected pages, please fill in the identification section.

BACKGROUND INFORMATION

G Instructor G Student

G High School G Vocational G Technical Institute G University

IDENTIFICATION

NAME ADDRESS

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