8647A Signal Generator Operation and Service Guide
08647-90006
March 1984
Title & Document Type:
Manual Part Number:
Revision Date:
HP References in this Manual
This manual may contain references to HP or Hewlett-Packard. Please note that HewlettPackard's former test and measurement, semiconductor products and chemical analysis
businesses are now part of Agilent Technologies. We have made no changes to this
manual copy. The HP XXXX referred to in this document is now the Agilent XXXX.
For example, model number HP8648A is now model number Agilent 8648A.
About this Manual
We’ve added this manual to the Agilent website in an effort to help you support your
product. This manual provides the best information we could find. It may be incomplete
or contain dated information, and the scan quality may not be idea l. If we find a better
copy in the future, we will add it to the Agilent website.
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Agilent no longer sells or supports this product. You will find any other available
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Search for the model number of this product, and the resulting product page will guide
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if no repair parts are needed, but no other support from Agilent is available.
Operation and Service
Guide
HP
SERIAL
This
3247A
8647A
NUMBERS
manual applies directly
and
3349A.
Signal Generator
to
all instruments
with
serial prefix
HP
Wt
NO.
Printed in
08647-90006
USA
March
1994
Notice.
The information contained in this document is subject to
change without notice.
Hewlett-Packard makes no warranty of any kind
material, including but not limited to, the implied warranties
with
regard to this
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
is
prior written permission
prohibited, except
as
allowed under the
copyright laws.
CA,
1400 Fountaingrove Parkway, Santa Rosa
Reproduced with Permission, Courtesy
of
Agilent Technologies, Inc.
95403-1799, USA
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.
Warranty
Regulatory
Information
The regulatory information is in Chapter
This Hewlett-Packard instrument product
4,
“Specifications.
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.
HEWLETT-PACKARD SPECIFICALLY DISCLAIMS THE IMPLIED
WARRANTIES
OF
MERCHANTABILITY AND FITNESS FOR
PARTICULAR PURPOSE.
EXCLUSIVE
REMEDIES
THE REMEDIES PROVIDED HEREIN ARE BUYER’S SOLE AND
EXCLUSIVE REMEDIES. HEWLETT-PACKARD SHALL NOT BE
ANY
LIABLE FOR
CONSEQUENTIAL DAMAGES, WHETHER J3ASED
OR
TORT,
ANY OTHER LEGAL THEORY.
DIRECT, INDIRECT, SPECIAL, INCIDENTAL,
ON
CONTRACT,
A
OR
iii
Assistance
Product maintenance agreements and other custom assistance
agreements are available
assistance, contact your nearest Hewlett-Rzckard Sales and Semvice
Ome.
page.
&fer to the list
for
Hewlett-Rzckard products.
of
Sales and Sewice
mr
O~es
on the following
any
iv
Hewlett-Packard Sales and Service
Offices
US
FIELD
HEADQUARTERS
OPERATIONS
Hewlett-Packard Company
19320 Pruneridge Avenue
Cupertino,
95014,
USA
CA
(800) 752-0900
California
Hewlett-Packard
Co.
1421 South Manhattan Ave.
Fullerton,
CA
92631
(714) 999-6700
Hewlett-Packard
Co.
301 E. Evelyn
CA
Mountain View,
94041
(415) 694-2000
Colorado
Hewlett-Packard Co.
24 Inverness Place, East
Englewood, CO 80112
(303) 649-5000
Georgia
Hewlett-Packard Co.
2000 South Park Place
GA
Atlanta,
30339
(404) 955-1500
Illinois
Hewlett-Packard Co.
5201 Tollview Drive
Rolling Meadows, IL 60008
(708) 255-9800
Hewlett-Packard 'hiwan
8th Floor, H-P Building
337 Fu Hsing North Road
'Mpei, Taiwan
(886 2) 712-0404
Ltd.
Ltd.
Ltd.
Co.
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
Warning
Instrument
Markings
Caution denotes
not correctly performed or adhered to, would result in damage to or
destruction
until the indicated conditions are fully understood and met.
Warning denotes a hazard.
if
which,
injury or loss of life.
the indicated conditions
The following markings and caution and warning labels are used on
the instrument. Be sure to observe all cautions and warnings.
Instruction The instruction documentation symbol. The product
Manual
not correctly performed or adhered to, could result in
a
hazard. It calls attention to a procedure that, if
of
the instrument.
Do
is
marked with this symbol when it
user to refer to the instruction in the manual.
Do
not proceed beyond a caution sign
It
calls
attention to a procedure
not proceed beyond a warning note until
are
fully understood and met.
is
necessary for the
A
Warning
Warning
The CE93 mark shows compliance with European Community 1993
standards.
The CSA mark is the Canadian Standards Association safety mark.
a
The ISM1-A mark is
1,
Group
Hazardous voltage always present in
power cord connected to ac line.
Hazardous Voltage
Class A product.
symbol of an Industrial Scientific and Medical
this
area
with instrument
vi
Caution
General Safety
Considerations
Warning
Hazardous electrical shock. Heat sink is live. Disconnect power
supply before servicing.
No
operator serviceable parts inside. Refer servicing to qualified
To
personnel.
prevent electrical shock, do not remove covers.
Warning
Warning
Caution
If this instrument
Hewlett-Packard
may be impaired.
For continued protection against
only with same type and rating
other fuses or material
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.
is
used in a manner not specified by
Co.,
the protection provided by the instrument
fire
hazard replace line fuse
(3
A
250
V
type
F).
The use of
is
prohibited.
vii
How
Guide
to
Use
This
This guide
uses
the
following convention:
Documentation
Description
(FRONT-PANEL
Display
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
rn
explanations
installation instructions
rn
tables of specifications
theory of operation of the signal generator
rn
troubleshooting procedures to identify failed assemblies
KEY]
of
This represents a key physically located on
the instrument.
Text in this font represents FREQUENCY,
MODULATION, and AMPLITUDE displays.
all
operation features
error messages displayed on the signal generator
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
. PowerKey
2
.
Display Contrast
3
.
Function and Data Keys
.
Increment Set Keys
4
5
.
Knobs
6
.
MEMORY
7
.
Modulation Source ................
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
Renumbering the Registers in a Sequence
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
Turning the Reference Mode
Setting a New Reference Value
Holding the Output Attenuator Range
Set the Amplitude Level
Holding the Attenuator
Adjusting the Amplitude
......................
...................
...................
.................
.............
...............
....................
....................
................
.............
...............
...............
...............
...............
..................
...................
..............
..............
..............
............
..............
..........
..............
................
..............
..........
..............
.............
..............
Off
or On
..........
.........
..............
...............
..............
.
.
...
........
......
.......
.......
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
1-2
1-2
1-2
1-2
1-2
1-2
1-3
1-3
1a-1
1a-1
1a-2
1a-2
1a-2
1a-3
1a-3
1 a-4
1a-4
1a-4
1a-5
1a-6
1
a-7
1a-7
1a-7
1a-9
1a-9
Contents-1
Operation Reference
lb
.
Frequency and Amplitude
1
.
Knob
2
. Digit-Select Arrow 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-
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
3
.
EXTACEXTDC
4
.
1
Setting the Modulation Level
5
.
MOD
RF OUTPUT
1
.
RFON/OFF
2
.
ATTNHOLD
Vernier Ranges
3
.
RFOUTPUT
Rear Panel
1
. 10 MHz 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
......................
....................
.......................
.......................
...................
...................
....................
....................
....................
.......................
........................
@
....................
[DEL)
....................
........................
......................
.....................
......................
.......................
......................
.......................
......................
400
Hz INT 1 kHz
kHz + EXT
INPUT/OUTPUT
.....................
...................
...................
...................
......................
...................
...............
.............
...................
..................
..................
.................
..................
1b-10
1b-11
1b-12
..............
............
..................
..................
..............
.................
DC
................
...........
..............
..................
.........
...............
.............
.............
......
.............
..................
............
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
1b-2
1b-2
1b-22
1b-22
1b-22
1b-23
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
1
1
1
Contents2
4 . Register Recall Arrows
Memory Interface (Accessory)
1
. POWER
2 . Copy Arrow Keys
Making a Copy
3.BUSY
IC
.
Operation Messages
Front Panel Operation Messages
HP-IB . Command Errors
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
.
RF Level Accuracy Performance Test
CW
Frequency Error Performance Test
Frequency Accuracy Performance Test (Option 1E5
Only)
......................
.................
...............
.............
..................
...............
...............
...........
...........
...........
...........
............
............
.............
.........
......
....
....
......
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
Operation
1
“Operation” contains the following information:
Note
1.
Operation
la. Operation
Examples the instrument.
lb. Operation
Reference the instrument’s functions.
Operation
Messages
For information about service messages numbered
refer to Chapter
Provides a quick overview of the instrument’s
operation.
Provides examples to help you learn how
Provides quick access to information about each of
Provides information about both front-panel and
HP-IB
remote operation messages.
5c,
“Service Error Messages.”
500
and above,
to
operate
Operation
1.1
Quick
Overview
1.
Power
Key
1
234
Press
(m)
to the same state
the RF output will be turned
on.
6
to power-up the instrument. The instrument powers up
it
7
was in when power was turned off, except that
off
press the
fJ-1
key to turn it
2.
Display Contrast
3.
Function and Data
4.
Increment Set Keys
5.
Keys
Knobs
Display contrast
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.
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
the active function. Press the or
active function setting by the increment value.
The knobs are always active when the instrument is in local (front
panel) control. Turn them
amplitude of the RF output. Press
adjust the knob’s resolution.
Press
(-SET),
reference value and turn
turn on and off the reference mode without changing the reference
value. When the reference mode is
the offset between the reference value and the RF output signal.
is
an adjustment that is located on the rear panel.
If
the display
[-SET)
next to each knob, to set the displayed value
to view or change the increment value for
to
increase or decrease the frequency or
on
the reference mode. Press
is
blank, first attempt to adjust
(TD
key at any time to change the
@
or
a,
next to each knob, to
CREF
on,
the displayed value indicates
as
the
ON/OFF)
0
1-2
Operation
7.
Modulation
6.
MEMORY
Source
Memory registers allow you to save instrument set-ups and recall
a
them whenever you wish. Press and enter
number to save the instrument's current settings.
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.
Press
[MOD
ON/OFF)
Lm]
for modulating the RF output signal. These tones are also available
as
an
selected. Press
audio source via the
or
output signal at the
to turn on or off the modulation source. Press
(-1
[m)
to select one of the internal source tones
MOD
INPUT/OUTPUT port when they are
or
[EXTI
MOD
INPUT/OUTPUT port.
to
ac- or dc-couple
two-digit register
To
recall the
an
external
(ikk + EXT
Press
the internal
(Additional internal plus external modulation capabilities are available
for HP-IB operation.)
DC)
to frequency modulate the RF signal with
1
kHz tone and an external source
at
the same time.
Operation
1-3
la
Operation
metting
G
Started
Examples
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.
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
own.
If
instrument’s remaining functions on your
or want additional information on a function, refer to Chapter
“Operation Reference.”
understand, refer to Chapter
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
If
a message
IC,
is
displayed that
“Operation Messages.”
you have trouble
lb,
you
do not
5.
Holding the Output Attenuator Range
1
4
2
3
5
Operation Examples
la-1
Setting the
Output
RF
Signal
Setting the Frequency
Setting the Amplitude
In this example, you
level of the
1.
Set the frequency to
RF
will
set the frequency, amplitude, and modulation
output signal.
100
MHz
using the keys shown below the
instrument diagram.
If
you make a mistake while entering a value, press
it.
2.
Set the amplitude to
-100
dBm.
to correct
functl
.drw
la-2
Operation
Examples
funct2.dnv
Turn
on
the
RF
Output
3.
Press
@KjiEF]
RF
OFF
is displayed below the amplitude setting when the
output is turned
to turn on the RF output.
RF
off.
Setting the
Modulation
MODULATION
100.00000
4.
Set the
The modulation rate is displayed below the deviation setting.
Use the MODULATION SOURCE keys when you
modulation source and turn modulation
FM
deviation to
MHz
3
kHz.
FM
-
3.00
on
kHz
or
wish
off.
AMPUTUDE
to select a
rlJnd3.dlw
Operation Examples 1 a-3
Incrementing or
Decrementing the
RF
Output Signal
Preliminary Steps
In this example, you will increment the amplitude and frequency
the RF output signal.
1.
If
they are not already set, set the frequency to
-100
amplitude to
dBm.
100
MHz,
and the
of
Using
the
Knob
FREQUENCY
2.
Increment the amplitude using
Press or when you wish to adjust the increment resolution.
100.00000
-i
MHz
MODULATION
the
knob.
-
-101.0
AMPUT
Incrl.drw
dBm
la-4 Operation Examples
Using
the
Increment
keys
3.
Enter a frequency increment of
The $ symbol is displayed when you press
that the displayed value is the increment set value.
4.
Increment the RF output frequency in
25
kHz.
25
(-SET_)
kHz
to indicate
steps.
i
m
The increment keys affect the
(FREQUENCY, AMPLITUDE,
FREOUENCY
100.02500
-
MHz
last
FUNCTION selected
FM,
AM
or
9M).
MODULATION
-
AMPLITUDE
-101.0
.
dBm
J
incr4.d~
Operation
Examples
la-5
Using
Registers
the
Memory
The memory register examples show you how to create a sequence
registers, delete a register from that sequence, renumber the registers
in the sequence, and insert a new register in the sequence.
of
Up to
can contain up
300
in the sequences in any combination (such
registers each, or 3 sequences of
total does not exceed
sequences each contain
10
register sequences can be-defined
to
100 registers
registers available in the instrument. The registers can be used
300 registers.
100
(00
through
100
registers
It
(0
through 9). A sequence
99).
There are a total of
as
10
sequences of
registers each)
is not possible to have all
as
that would be
as
long
1000
8,
30
as
the
10
registers.
tl
REG 99
-
300REG
J
1
a-6 Operation Examples
Saving
Settings
Instrument
in Register
Sequences
In this ten step example, you will use the memory keys to create
a sequence containing three registers. Each register will contain
different frequency setting.
Selecting the Sequence
1.
Select sequence
If
there are registers saved in sequence 0, the message shown
in the display below
example
sequence
will
0
0.
will
not appear. Note that the steps in this
cause the settings in registers
to be changed.
00,
01,
and
02
of
regseql
a
.dm
(,,,I.]
Saving Settings
2.
Set the frequency to
3.
Save the instrument settings in register
in
Registers
10.00000
SEQ
0
REG
10
MHz
00
MHz.
00.
4.
Set the frequency setting to
11
MHz.
Operation
Examples
la-7
5.
Save the instrument settings in register
6.
Set the frequency to
12
MHz.
regseq4.d~
01.
regseq5.d~
1
a4
Operation Examples
7.
Save the instrument settings in register
02.
p-
Checking the Sequence
8.
Recall the registers in sequence
The
a
which key
12.00000
SEQ
and
@J
was
10.00000
FREQUENCY
0
pressed
'-,
MHz
REG
02
keys recall registers or sequences depending
MHz
last
MODULATION
(m
0.
or
ISEQ_)).
-
AMPLITUDE-
on
regseq8.d~
Checking a Different Sequence
9. Select sequence
1.
Operation Examples 1 a-9
Note
10.
Step through the registers in sequence
1
if
there
are
registers
saved in it.
1
Sequence
does not contain the settings you saved in sequence
0. The instrument enables you to save different settings in each
sequence to create up to ten different sequences for your testing.
Remember when you save or recall
a
register, be sure that the correct
sequence is also selected.
SEQ
1
REG
00
req0.dnv
la-1
0
Operation
Examples
Deleting a Register
from
the
Sequence
In this example,
created in the preceding example.
Selecting the Sequence
1.
Select sequence
you
0.
will
delete a register
from
the sequence
you
Note
\f
L
Deleting a Register
2.
Delete register
The contents of the register are recalled when
allows
you
to resave the contents if
FREQUENCY
SEQ
01
FREQUENCY
0
from
'-
sequence
-
MODULAllON
0.
you
need to.
MODULATION
-
-
AMPLITUDE
it
is
deleted. This
AMP
1
d%lregO.drw
Operation
Examples
delregl
.drw
la-1
1
3.
Step through the remaining registers in sequence 0.
The deleted register number has been removed from the sequence.
Note that the instrument does not renumber the registers when
one is deleted.
delreg2.d~
1
a.12
Operation
Examples
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