HP HP 8647A Operation manual

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8647A Signal Generator Operation and Service Guide
08647-90006
March 1984

Operation and Service
Guide
HP 8647A Signal Generator
SERIAL NUMBERS
This manual applies directly to all instruments with serial prefix
3247A and 3349A.
HP Wt NO. 08647-90006
Printed in USA March 1994

Notice. The information contained in this document is subject to
change without notice.
Hewlett-Packard makes no warranty of any kind
with regard to this
material, including but not limited to, the implied warranties
of
merchantability and fitness for a particular purpose. Hewlett-Packard
shall not be liable for errors contained herein or for incidental
or consequential damages in connection with the furnishing,
performance, or use of this material.
@ Copyright Hewlett-Packard Company 1994
All Rights Reserved. Reproduction, adaptation, or translation without
prior written permission
is prohibited, except as allowed under the
copyright laws.
1400 Fountaingrove Parkway, Santa Rosa
CA, 95403-1799, USA
Reproducedwith Permission,Courtesy of AgilentTechnologies,Inc.

Certification
Hewlett-Packard Company certifies that this product met its
published specifications at the time of shipment from the factory.
Hewlett-Packard further certifies that its calibration measurements
are traceable to the United States National Institute of Standards and
Technology, to the extent allowed by the Institute’s calibration facility,
and to the calibration facilities of other International Standards
Organization members.
Regulatory
Information
The regulatory information is in Chapter 4, “Specifications.
Warranty
This Hewlett-Packard instrument product is warranted against defects
in material and workmanship for a period of one year from date of
shipment. During the warranty period, Hewlett-Packard Company
will, at its option, either repair or replace products which prove to be
defective.
For warranty service or repair, this product must be returned to a
service facility designated by Hewlett-Packard. Buyer shall prepay
shipping charges to Hewlett-Packard and Hewlett-Packard shall pay
shipping charges to return the product to Buyer. However, Buyer shall
pay
all shipping charges, duties, and taxes for products returned to
Hewlett-Packard from another country.
Hewlett-Packard warrants that its software and firmware designated
by Hewlett-Packard for use with an instrument
will execute
its programming instructions when properly installed on that
instrument. Hewlett-Packard does not warrant that the operation
of the instrument, or software, or firmware will be uninterrupted or
error-free.
LIMITATION OF WARRANTY
The foregoing warranty shall not apply to defects resulting from
improper or inadequate maintenance by Buyer, Buyer-supplied
software or interfacing, unauthorized modification or misuse,
operation outside of the environmental specifications for the
product, or improper site preparation or maintenance.
NO OTHER WARRANTY IS EXPRESSED OR IMPLIED.
WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE.
HEWLETT-PACKARD SPECIFICALLY DISCLAIMS THE IMPLIED
EXCLUSIVE REMEDIES
THE REMEDIES PROVIDED HEREIN ARE BUYER’S SOLE AND
LIABLE FOR
ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES, WHETHER J3ASED ON CONTRACT,
TORT,
OR ANY OTHER LEGAL THEORY.
EXCLUSIVE REMEDIES. HEWLETT-PACKARD SHALL NOT BE
iii

Assistance
Product maintenance agreementsand other customassistance
agreements are available
for Hewlett-Rzckardproducts. mr any
assistance, contact your nearest Hewlett-Rzckard Sales and Semvice
Ome. &fer to the list of Sales and Sewice O~es on thefollowing
page.
iv

Hewlett-Packard Salesand Service Offices
US FIELD OPERATIONS
HEADQUARTERS
Hewlett-Packard Company
19320 Pruneridge Avenue
Cupertino,
CA 95014, USA
[phone]
California
Hewlett-Packard Co.
1421South Manhattan Ave.
Fullerton,
CA 92631
[phone]
Hewlett-Packard
Co.
301 E. Evelyn
Mountain View,
CA 94041
[phone]
Colorado
Hewlett-Packard Co.
24 Inverness Place, East
Englewood, CO 80112
[phone]
Georgia
Hewlett-Packard Co.
2000 South Park Place
Atlanta,
GA 30339
[phone]
Illinois
Hewlett-Packard Co.
5201 Tollview Drive
Rolling Meadows, IL 60008
[phone]
New Jersey
Hewlett-Packard Co.
150 Green Pond Road
Rockaway,
NJ 07866
[phone]
Texas
Hewlett-Packard Co.
930 E. Campbell Rd.
Richardson, TX 75081
[phone]
EUROPEAN OPERATIONS
HEADQUARTERS
Hewlett-Packard S.A.
150,Route du Nant-d'Avril
1217Meyrin 2/Geneva
Switzerland
(41
22) 780.8111
France
Hewlett-Packard France
1 Avenue Du Canada
Zone D'Activite De Courtaboeuf
F-91947Les Ulis Cedex
France
(33 1) 69 82 60 60
Germany
Hewlett-Packard GmbH
Hewlett-Packard Strasse
6380 Bad Homburg v.d.H
Germany
(49 6172) 16-0
Great Britain
Hewlett-Packard Ltd.
INTERCON OPERATIONS
HEADQUARTERS
Hewlett-Packard Company
3495 Deer Creek Rd.
Palo Alto, California 94304-1316
[phone]
Australia
Hewlett-Packard Australia Ltd.
31-41 Joseph Street
BIackburn, Victoria 3130
(61
3) 895-2895
Canada
Hewlett-Packard (Canada) Ltd.
17500 South Service Road
Trans-Canada Highway
Kirkland, Quebec H9J 2x8
Canada
[phone]
Japan
Yokogawa-Hewlett-Packard Ltd.
1-27-15Yabe, Sagamihara
Eskdale Road, Winnersh Triangle Kanagawa 229, Japan
Wokingham, Berkshire
RGll 5DZ (81 427) 59-1311
England
(44 734) 696622
China
China Hewlett-Packard, Co.
38 Bei San Huan X1 Road
Shuang Yu Shu
Hai Dian District
Beijing, China
(86
1) 256-6888
Singapore
Hewlett-Packard Singapore
Pte. Ltd.
1150Depot Road
Singapore 0410
(65) 273 7388
miwan
Hewlett-Packard 'hiwan
8th Floor, H-P Building
337 Fu Hsing North Road
'Mpei, Taiwan
(886 2) 712-0404
V

Safety Notes
The following safety notes are used throughout this manual.
Familiarize yourself with each of the notes and its meaning before
operating this instrument.
Caution denotes
a hazard. It calls attention to a procedure that, if
not correctly performed or adhered to, would result in damage to or
destruction
of the instrument. Do not proceed beyond a caution sign
until the indicated conditions are fully understood and met.
Caution
Warning
Warning denotes a hazard. It calls attention to a procedure
which,
if not correctly performed or adhered to, could result in
injury or loss of life.
Do not proceed beyond a warning note until
the indicated conditions
are fully understood and met.
Instrument
The following markings and caution and warning labels are used on
the instrument. Be sure to observe all cautions and warnings.
Markings
Warning
Instruction The instruction documentation symbol. The product
Manual
is marked with this symbol when it is necessary forthe
A
user to refer to the instruction in the manual.
The CE93 mark shows compliance with European Community 1993
standards.
The CSA mark is the Canadian Standards Association safety mark.
The ISM1-A mark is
a symbol of an Industrial Scientific and Medical
Group
1, Class A product.
Hazardous voltage always present in
this area with instrument
power cord connected toacline.
Warning
Hazardous Voltage
vi

Caution
Hazardous electrical shock. Heat sink is live. Disconnect power
supply before servicing.
General Safety
Considerations
Warning
Caution
Warning
No operator serviceableparts inside. Refer servicingto qualified
personnel.
To prevent electrical shock, do not remove covers.
If this instrument is used in a manner not specified by
Hewlett-Packard
Co., the protection provided by the instrument
may be impaired.
For continued protection against
fire hazard replace line fuse
only with same type and rating
(3 A 250 V type F). The use of
other fuses or material
is prohibited.
Always use the three-prong ac power cord supplied with this
instrument. Failure to ensure adequate earth grounding by not using
this cord may cause instrument damage.
Warning
vii

How to Use This
Guide
This guide uses the
(FRONT-PANEL KEY]
following convention: the instrument.
Display
This represents a key physically located on
Text in this font represents FREQUENCY,
MODULATION, and AMPLITUDE displays.
Documentation
Description
This guide contains the information required to operate, calibrate, and
repair the signal generator to the assembly level. Included are the
following:
a quick overview of the signal generator
examples of typical operation
rn a reference section that describes all operation features
rn explanations of error messages displayed on the signal generator
installation instructions
rn tables of specifications
theory of operation of the signal generator
rn troubleshooting procedures to identify failed assemblies
replaceable part numbers
adjustments required after repair or performance test failure
performance tests to test the instrument to specifications
viii

Contents
1 . Operation
Quick Overview ................... 1-2
1 . PowerKey ................... 1-2
2 . Display Contrast ................. 1-2
3 . Function and Data Keys ............. 1-2
4
. Increment Set Keys ............... 1-2
5 . Knobs ...................... 1-2
6 . MEMORY .................... 1-3
7 . Modulation Source ................ 1-3
la . Operation Examples
Getting Started ....................
Operation Examples ................
Setting the RF Output Signal .............
Setting the Frequency ...............
Setting the Amplitude ...............
Turn on the RF Output ...............
Setting the Modulation ...............
Incrementing or Decrementing the RF Output Signal . .
Preliminary Steps ..................
Using the Knob ...................
Using the Increment keys ..............
Using the Memory Registers ..............
Saving Instrument Settings in Register Sequences ...
Selecting the Sequence ..............
Saving Settings in Registers ............
Checking the Sequence ..............
Checking a Different Sequence ..........
Deleting a Register from the Sequence ........
Selecting the Sequence ..............
Deleting a Register ................
......
Decreasing the Register Number ..........
Checking the Sequence ..............
Inserting a Register in a Sequence ..........
Saving a New Register ..............
Offsetting the RF Output from a Reference .......
Setting the Reference Value .............
Offsetting the RF Output ..............
Renumbering the Registers in a Sequence
Turning the Reference Mode Off or On .......
Holding the Output Attenuator Range .........
Holding the Attenuator ...............
Setting a New Reference Value
..........
Set the Amplitude Level ..............
Adjusting the Amplitude ..............
1a-1
1a-1
1a-2
1a-2
1a-2
1a-3
1a-3
1a-4
1a-4
1a-4
1a-5
1a-6
1 a-7
1a-7
1a-7
1a-9
1a-9
1a-11
1a-11
1a-11
1a-13
1a-13
1a-14
1a-15
1a-16
1a-17
1a-17
1a-18
1a-18
1a-19
1a-20
1a-20
1a-20
1a-21
Contents-1

lb .
Operation Reference
Frequency and Amplitude ...............
1 . Knob ......................
2 . Digit-SelectArrow Keys .............
3 . REFSET ....................
Units .......................
4 . REF ON/OFF ...................
Function .......................
1 . FREQUENCY ..................
2 . AMPLITUDE ..................
3 . FMAM4M ...................
INCREMENT SET ...................
1 . INCRSET ....................
Data .........................
1 . MHz/dBm ....................
Units Conversion .................
2 . Backspace ....................
3 . emf .......................
4.f ........................
Instrument Preset ..................
(POWER] @ ....................
Cm- [DEL) ....................
HP-IB ........................
1 . ADRS ......................
2 . LOCAL .....................
MEMORY ......................
1.SAV .......................
2 . REG ......................
3 . Register Recall Arrows ..............
4 . SEQ .......................
5 . DEL ......................
Renumbering the Registers ............
Modulation Source ..................
1 . MODON/OFF ..................
2 . INT 400 Hz INT 1 kHz ..............
3 . EXTACEXTDC .................
4 . 1 kHz + EXT DC ................
Setting the Modulation Level ...........
5 . MOD INPUT/OUTPUT ..............
RF OUTPUT .....................
1 . RFON/OFF ...................
2 . ATTNHOLD ...................
Vernier Ranges ..................
3 . RFOUTPUT ...................
Rear Panel ......................
1 . 10MHz REF INPUT and OUTPUT .........
2 . DISPLAY CONTRAST ...............
3 . AUXILIARY INTERFACE .............
4 . Line Voltage Connector .............
5 . HP-IB Connector .................
6 . TIMEBASEADJUSTandHelpSwitches ......
Remote Interface (Accessory) .............
1 . MODON/OFF ..................
2 . RFON/OFF ...................
3 . Sequence Selection Arrows ............
1b-2
1b-2
1b-2
1b-3
1b-3
1b-3
1b-4
1b-4
1b-4
1b-4
1b-5
1b-5
1b-6
1b-6
1b-6
1b-6
1b-6
1b-6
1b-7
1b-7
1b-7
1b-9
1b-9
1b-9
1b-10
1b-11
1b-12
1b-12
1b-13
1b-14
1b-14
1b-15
1b-16
1b-16
1b-16
1b-17
1b-17
1b-17
1b-18
1b-18
1b-18
1b-18
1b-19
1b-20
1b-20
1b-20
1b-21
1b-2 1
1b-2 1
1b-2 1
1b-22
1b-22
1b-22
1b-23
Contents2

4 . Register Recall Arrows .............. lb-23
Memory Interface (Accessory)
............. 1b-24
1 . POWER ..................... 1b-24
2. Copy Arrow Keys ................ 1b-25
Making a Copy .................. 1b-25
3.BUSY ...................... 1b-25
IC . Operation Messages
Front Panel Operation Messages ............ 1c-1
HP-IB . Command Errors ............... 1c-5
HP-IB Execution Errors ................ 1c-7
HP-IB Device-Specific Errors ............. 1c-7
HP-IB Query Errors .................. 1c-7
Service Messages ................... 1c-8
2 .
Hp-IB Programming
Background .....................
Programming Guidelines ...............
HP-IB Definition ..................
What is Programmable ...............
HP-IB Address ...................
Error Messages ...................
Programming Language ...............
Query .......................
Advanced Programming ...............
Programming Examples ................
Programming RF Frequency .............
Programming RF Amplitude .............
HP-IB Status Reporting ................
External Modulation Input Level Status
Programming RF Frequency and FM Modulation
...
Querying RF Frequency ...............
.......
Example: Check the Condition of Modulation Input
Example: Generate a Service Request for External
Modulation Input (High or Low)
Reverse Power Protection Status ..........
Example: Check the condition of the RPP .....
Unspecified Power (Amplitude) Entry Status
Example: Check the Condition of Unspecified Power
Entry
.....................
AM Subsystem ...................
CAL Subsystem ...................
FM Subsystem ...................
FREQuency Subsystem ...............
OUTPut Subsystem .................
PM Subsystem ...................
POWer Subsystem .................
STATUSSubsystem .................
SYSTem Subsystem .................
HP-IB Capabilities ..................
HP-IB Connector Information .............
(High or Low) .................
........
.....
HP 8647A SCPI Command Reference
.........
2-1
2-3
2-3
2-3
2-3
2-3
2-3
2-3
2-3
2-4
2-4
2-4
2-5
2-5
2-8
2-9
2-9
2-10
2-11
2-11
2-11
2-12
2-13
2-14
2-14
2-15
2-16
2-16
2-17
2-18
2-19
2-20
2-21
2-22
Contents3

3 . Installation
Unpacking Your Signal Generator ........... 3-1
Connecting AC Power
................. 3-1
Power Requirements ................ 3-2
Replacing the Fuse
................. 3-2
Turning On the Signal Generator
........... 3-5
Connecting to Other Instruments
........... 3-5
Storing the Signal Generator
............. 3-5
Shipping the SignalGenerator
............. 3-6
4 . Specifications
Frequency Specifications ............... 4-2
Internal Reference Oscillator
............. 4-2
output
........................ 4-3
Spectral Purity
.................... 4-3
Frequency Modulation
................ 4-4
Phase Modulation ................... 4-5
Amplitude Modulation
................ 4-5
Modulation Source
.................. 4-6
Remote Programming
................. 4-6
Environmental
.................... 4-6
General
....................... 4-6
Regulatory Information
................ 4-8
IS0 9002 Compliant
................. 4-8
Statement
of Compliance .............. 4-8
Noise Declaration .................. 4-8
5 . Service
Shipping Your Instrument Back to Hewlett-Packard ... 5-1
Operation Verification Software
............ 5-2
5a . Theory of Operation
Introduction ..................... 5a-1
Overview
..................... 5a-2
A1 Front Panel ................... 5a-2
A2 Power Supply .................. 5a-3
A3 Motherboard
.................. 5a-3
A4 Reference
................... 5a-4
A5 Sig Gen Synth
.................. 5a-4
A6 Output
..................... 5a-4
A7 Attenuator
................... 5a-5
5b . Troubleshooting Information
Introduction ..................... 5b-1
Troubleshooting Checklist
............... 5b-2
AC Mains (line) Fuse Removal ............. 5b-3
To Remove the Fuse ................ 5b-3
ModulationTestpoints and Power Supply LEDs
..... 5b-4
Power Supply Distribution
.............. 5b-5
Contents4

5c . Service Error Messages
6 . Replaceable Parts
Introduction ....................
Assembly Replacements ..............
7 . Adjustments
Internal Timebase Adjustment .............
Recommended Equipment (or equivalent) ......
Procedure .....................
8 . Performance Tests
Calibration Cycle ...................
Required Test Equipment ...............
FM Accuracy Performance Test ...........
FM Distortion Performance Test ...........
AM Accuracy Performance Test ...........
AM Distortion Performance Test ...........
Phase Modulation Accuracy Performance Test ....
Phase Modulation Distortion Performance Test ....
Residual FM Performance Test ............
Harmonics Performance Test ............
Spurious Performance Test .............
DC FM Frequency Error Performance Test ......
RF Level Accuracy Performance Test .........
CW Frequency Accuracy Performance Test (Option 1E5
Only)
......................
Test Record ....................
6-1
6-1
7-1
7-1
7-1
8-1
8-2
8-3
8-4
8-6
8-7
8-9
8-10
8-12
8-14
8-15
8-16
8-17
8-18
8-19
Index
Contents-5

Figures
2.1 . HP 8647A StatusRegister Model ...........
2-8
3.1 . Replacing the Fuse ................. 3-3
5a.1 . Simplified Block Diagram .............. 5a-1
5b.1
. Removing the Fuse Housing ............. 5b-3
8.1 . FM Accuracy Equipment Setup ........... 8-3
8.2 . FM Distortion Equipment Setup ........... 8-4
8.3 . AM Accuracy Equipment Setup ........... 8-6
8.4 . AM Distortion Equipment Setup
...........
8-7
8.5 . Phase Modulation Distortion Equipment Setup .... 8-9
8.6
. Phase Modulation Distortion Equipment Setup .... 8-10
8.7 . Residual FM Equipment Setup
............ 8-12
8.8 . Harmonics Equipment Setup ............ 8-14
8.9 . Spurious Equipment Setup ............. 8-15
8.10
. DC FM Frequency Error Equipment Setup ...... 8-16
8.11 . RF Level Accuracy Equipment Setup ........ 8-17
8.12 . CW Frequency Accuracy Equipment Setup ......
8-18
3.2
. Power Cable and Mains Plug ............ 3-4
Thbles
2.1 .
2.2 .
2.3 .
3.1 .
5a.1 .
6.1 .
8.1 .
8.2 .
8.3 .
8.4 .
8.5 .
8.6 .
8.7 .
8.8 .
8.9 .
8.10 .
8.11 .
8.12 .
8.13 .
8.14 .
Programming Command Statements and Descriptions .
Dictionary of Terms .................
IEEE 488.2 Capabilities ...............
Voltage Ranges for Nominal Voltage Values ......
A1 Front Panel (keyboard) .............
Replaceable Parts ..................
HP 8647A Test Record ...............
HP 8647A Test Record ...............
FM Accuracy Performance Test ...........
FM Distortion Performance Test ...........
AM Accuracy Performance Test ...........
AM Distortion Performance Test ...........
Phase Modulation Accuracy Performance Test ....
Phase Modulation Distortion Performance Test ....
Residual FM Performance Test ............
Harmonics Performance Test ............
DC FM Frequency Error Performance Test ......
RF Level Accuracy Performance Test .........
CW Frequency Accuracy Performance Test (Option 1E5
Only)
......................
Spurious Performance Test .............
2-6
2-13
2-21
3-2
5a-3
6-2
8-19
8-20
8-21
8-22
8-23
8-25
8-26
8-27
8-28
8-29
8-32
8-33
8-34
8-39
Contents-6

1
Operation
Note
“Operation”contains the following information:
1. Operation
la. Operation
Examples the instrument.
lb. Operation
Reference the instrument’sfunctions.
Operation
Messages
HP-IB remote operation messages.
For information about service messages numbered
500 and above,
refer to Chapter
5c, “Service Error Messages.”
Provides a quick overview of the instrument’s
operation.
Provides examples to help you learn how to operate
Provides quick access to information about each of
Provides information about both front-panel and
Operation 1.1

Quick Overview
1
1. Power Key
2. Display Contrast
3. Function and Data
Keys
4. Increment Set Keys
5. Knobs
234 6 7
Press (m) to power-up the instrument. The instrument powers up
to the same state
it was in when power was turned off, except that
the RF output will be turned
off press the fJ-1 key to turn it
on.
Display contrast
is an adjustment that is located on the rear panel.
It allows you to adjust contrast for the front-panel display. Turn
the adjustment to optimize the display for viewing it from above,
below, or straight on.
If the display is blank, first attempt to adjust
the display contrast adjustment before returning the instrument for
service.
The keys in the FUNCTION and DATA blocks allow you to enter
values for setting the frequency, amplitude, and modulation level of
the RF output signal.
When you press a FUNCTION key, that function becomes the active
function. Press
[-SET) to view or change the increment value for
the active function. Press the or
(TD key at any time to change the
active function setting by the increment value.
The knobs are always active when the instrument is in local (front
panel) control. Turn them
to increase or decrease the frequency or
amplitude of the RF output. Press
@ or a, next to each knob, to
adjust the knob’s resolution.
Press
(-SET), next to each knob, to set the displayed value as the
reference value and turn
on the reference mode. Press CREF ON/OFF)
turn on and off the reference mode without changing the reference
value. When the reference mode is
on, the displayed value indicates
the offset between the reference value and the RF output signal.
0
1-2 Operation

6. MEMORY
Memory registers allow you to save instrument set-upsand recall
them whenever you wish. Press and enter
a two-digit register
number to save the instrument's current settings.
To recall the
settings, press and enter the register number. The arrow keys
allow you to recall registers in numerical sequence. You can arrange
your registers in up to ten different sequences.
The number of the currently selected sequence and the last register
selected are always displayed in the lower left corner of the display
to help you keep track of where you are in your testing process.
The memory register examples provided in Chapter la, "Operation
Examples," show you how to create a sequence and how to delete or
add registers in your sequence.
7. Modulation Source
Press [MOD ON/OFF) to turn on or off the modulation source. Press
Lm] or (-1 to select one of the internal source tones
for modulating the RF output signal. These tones are also available
as an output signal at the MOD INPUT/OUTPUT port when they are
selected. Press
[m) or [EXTI to ac- or dc-couple an external
audio source via the
MOD INPUT/OUTPUT port.
Press
(ikk + EXT DC) to frequency modulate the RF signal with
the internal
1 kHz tone and an external source at the same time.
(Additional internal plus external modulation capabilities are available
for HP-IB operation.)
Operation 1-3

la
Operation Examples
This section contains operating examples to help you learn how to
operate the signal generator. These examples can be performed
without any additional equipment.
G
metting Started
If this is the first time you have operated this instrument, perform
each of the following examples for a quick introduction to general
operation. After you have completed the examples, try operating the
instrument’sremaining functions on your
own. If you have trouble
or want additional information on a function, refer to Chapter
lb,
“Operation Reference.” If a message is displayed that you do not
understand, refer to Chapter
IC, “Operation Messages.”
Operation Examples
1. Setting the RF Output Signal
2. Incrementing or Decrementing the RF Output Signal
3. Using the Memory Registers
4. Offsetting the RF Output from a Reference
5. Holding the Output Attenuator Range
1 2 3
4 5
Operation Examples la-1

Settingthe RF
Output Signal
In this example, you will set the frequency, amplitude, and modulation
level of the
RF output signal.
Setting the Frequency
1. Set the frequency to 100 MHz using the keys shown below the
instrument diagram.
If you make a mistake while entering a value, press
it. to correct
Setting the Amplitude
2. Set the amplitude to -100 dBm.
functl .drw
funct2.dnv
la-2 Operation Examples