HP 8648A, 8648B, 8648C, 8648D User Manual
Operation and Service
Guide
HP
8648A/B/C/D
Signal Generator
SERIAL NUMBERS
This manual applies directly to the following HP 8648 model/serial
prefix combinations and below:
HP
8648A
3847A 3847U 3847A 3847U 3847A 3847U 3847A 3847U
HP
8648B BP 8648C
HP
8648D
HP Part No. 08648-90048
Printed in USA April 1999
Supersedes: November 1998
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 1996, 1998
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
FLEX and Motorola are trademarks of Motorola, Inc.
Windows@ and MS Windows@ are U.S. registered trademarks of
Microsoft Corporation.
Windows NT@ is a U.S. registered trademark of Microsoft
Corporation.
Certification
Hewlett-Packard Company certifies that this product met its published
specifications at the time of shipment from the factory.
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.
Hewlett-
Information
Warranty
Regulatory
The regulatory information is in Chapter 4, “Specifications.”
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.
HEWLETT-PACKARD SPECIFICALLY DISCLAIMS THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE.
EXCLUSIVE REMEDIES
THE REMEDIES PROVIDED HEREIN ARE BUYER’S SOLE AND
EXCLUSIVE REMEDIES. HEWLETT-PACKARD SHALL NOT BE
LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT,
TORT, OR ANY OTHER LEGAL THEORY.
. . .
III
Assistance
Product
agreements
assistance, contact
Ome.
wm.
maintenance
are available for
Refer to
the
agreements
gour
list of
and
other
customer
Hewlett-Rzckard products.
nearest Hewlett-Rxckard Sales
Sales
and
Service Omes on the
assistance
$br
any
and
Service
following
‘able
O-l. Hewlett-Packard Sales and Service
Offices
UNITED
Instrument
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(800) 403-0801
Headquarters
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,
~~~~~~~e~;~~~;~i~g
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#29-00 Gateway West
Singapore 0718
(65) 291-9088
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 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.
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.
The following markings and caution and warning labels are used on
the instrument. Be sure to observe all cautions and warnings.
The instruction documentation symbol. The product is
marked with this symbol when it is necessary for the user
to refer to the instructions in the manual.
The CE93 mark shows compliance with the European
Community 1993 standards.
A
CE
!
Warning
Warning
Warning
Caution
The CSA mark is the Canadian Standards Association
safety mark.
“ISMl-A” This 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 to ac line.
Do not remove this screw when removing cover from instrument.
Hazardous Voltage
Hazardous electrical shock. Heat sink is live. Disconnect power
supply before servicing.
vi
General Safety Considerations
Warning
Warning
Warning
Caution
No operator serviceable parts inside. Refer servicing to qualified
personnel. lb 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.
vii
How to Use This Guide
This guide uses the
following convention:
Documentation
Description
CFRONT-PANEL
KEY] This represents a key physically located on
the instrument.
Display
This font is used to represent text which
appears on the instrument display.
This guide contains the information required to operate, calibrate, and
repair the signal generator to the assembly level. Included are the
following:
n a quick overview of the signal generator
n examples of typical operation
n a reference section that describes all operation features
n explanations of error messages displayed on the signal generator
n installation instructions
w
tables of specifications
n tables of post-repair information and recommended equipment
required
n theory of operation of the signal generator
n troubleshooting procedures to identify failed assemblies
n disassembly procedures for removal and replacement of assemblies
n replaceable part numbers
n adjustments required after repair or performance test failure
n performance tests to test the instrument to specifications
n supplemental verification tests to test some unspecified parameters
of the instrument
VIII
. . .
Contents
1. Operation
Quick Overview ...................
1. Power Key ...................
2. Display .....................
3. Function and Data Keys
4. Increment Set Keys
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 Off or On
Setting a New Reference Value
Holding the Output Attenuator Range
Set the Amplitude Level
Holding the Attenuator
Adjusting the Amplitude
....................
................
................
................
.............
...............
.............
...............
...............
...............
...............
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......
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. .
...
l-2
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la-5
la-5
la-6
la-7
la-8
la-8
la-8
la-10
la-10
la-12
la-12
la-12
la-14
la-14
la-15
la-16
la-17
la-18
la-18
la-19
la-19
la-20
la-21
la-21
la-21
la-22
Contents-l
Setting a User Selectable Modulated Frequency and
Waveform (Option
lE2
or
1EP
Only) ........
Setting the Modulation Level ............
Setting the Modulated Waveform ..........
Setting the Modulated Frequency ..........
Signaling a Numeric-Type FLEX Pager (Option
Setting Up Pager Encoding .............
Entering Pager Encoding Settings ..........
Selecting the Format Settings ............
Selecting the Data Rate and Pager Type Settings ...
Selecting the Message Settings ............
Selecting Transmission Repetitions and amplitude . .
Selecting the Pager
Capcode
(Address) ........
Selecting the Protocol Settings ...........
Selecting the Roaming Mode Settings ........
Encoding ......................
lb. Operation Reference
Frequency and Amplitude ...............
1. Knob ......................
2. Digit-Select Arrow Keys .............
3. REFSET ....................
Units
4. REF
OkCFF’
: : : : : : : : : : : : : : : : : :
Function .......................
1. FREQUENCY ..................
2. AMPLITUDE ..................
3.FMAM4M
...................
Setting Up the Pager Encoder .............
1. ENCODER. ...................
Setting the Format .................
FLEX/FLEX-TD
..................
Setting the Data Rate and Pager Type .......
Setting the Message ................
Setting the Encoding Mode ............
Entering the Pager
Capcode
(Address) .......
Setting the Protocol ...............
Setting the Roaming Mode ............
Message During Encoding .............
Signaling Examples ................
SSID/NID
POCSAG
Roaming Example ............
......................
Setting the Data Rate and Pager Type .......
Setting the Message ................
Setting the Encoding Mode ............
Entering the Pager
Capcode
(Address) .......
Message During Encoding .............
RESYNC.. ....................
Setting the Encoding Mode ............
Message During
PN15
.......................
Resynchronizing
..........
Setting the Data Rate ...............
Message During Encoding .............
SERVICE
......................
Setting the Data Rate . . . . . . . . . . . . . . . lb-35
1EP
Only)
la-23
la-23
la-24
la-24
la-25
la-26
la-27
la-27
la-28
la-29
la-29
la-30
la-31
1 a-32
la-32
lb-2
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lb-6
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lb-8
lb-9
lb-9
lb-12
lb-14
lb-16
lb-18
lb-19
lb-22
lb-23
lb-25
lb-27
lb-27
lb-29
lb-31
lb-32
lb-32
lb-33
lb-33
lb-33
lb-34
lb-34
lb-34
lb-35
Contents2
Message During Servicing
.............
Pulse Modulation ...................
1. PULSE .....................
Increment Set ....................
1.
INCRSET
START/STOP Encoding
PREV and NEXT
....................
..............
.................
Data .........................
1. MHz/dBm kHz/mV
Units Conversion
ENTER
SHIFT
.....................
......................
%/pV rad/dBpV
.................
........
2. Backspace ....................
3. emf .......................
4.f ........................
Instrument Preset ..................
pGim)@
.....................
p?Fmg(DEL)
.....................
HP-IB
........................
1. ADRS ......................
2. LOCAL .....................
Memory .......................
l.SAV .......................
2. REG ......................
3. Register Recall Arrows
4.SEQ..
.....................
..............
5. DEL ......................
Renumbering the Registers
............
Modulation Source ..................
1. MOD ON/OFF ..................
2.
INT400HzINTl
kHz
3. (FREQUENCY) 4. (FREQUENCY/ WAVEFORM)
5. EXTACEXTDC
.................
6.1kHz+EXTDC
Setting the Modulation Level
7. MOD INPUT/OUTPUT
..............
...
................
...........
..............
RF Output ......................
1. RF ON/OFF ...................
2.A’I”l’NHOLD ...................
Vernier Ranges ..................
3. RF OUTPUT ...................
Rear Panel ......................
1. 10 MHz REF INPUT and OUTPUT
2. DISPLAY CONTRAST
3. AUXILIARY INTERFACE
4. Line Voltage Connector
5. HP-IB Connector
6.
TIMEBASE
ADJ and Language Switches
7. External Pulse Input
Remote Interface (Accessory)
...............
.............
.............
.................
...............
.............
.........
......
1. MOD ON/OFF ..................
2. RF ON/OFF ...................
3. Sequence Selection Arrows
4. Register Recall Arrows
Memory Interface (Accessory)
............
..............
.............
lb-35
lb-36
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lb-38
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1 b-45
lb-45
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lb-47
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lb-57
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1 b-60
Contents-3
1. POWER
2. Copy Arrow Keys
.....................
................
Making a Copy ..................
3.
BUSY
......................
lc. Operation Messages
Front Panel Operation Messages ............
HP-IB
. Command Errors ...............
HP-IB Execution Errors ................
HP-IB Device-Specific Errors .............
HP-IB Query Errors ..................
Service Messages ...................
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 Frequency and FM Modulation ...
Querying RF Frequency ...............
Programming RF Amplitude .............
Programming Pulse Modulation (Option
Programming Pager Encoder (Option
lE6)
1EP)
......
HP-IB Status Reporting ................
External Modulation Input Level Status .......
Example: Check the Condition of Modulation Input
(High or Low) .................
Example: Generate a Service Request for External
Modulation ..................
Reverse Power Protection Status
Example: Check the condition of’the
RPP : : : : :
Unspecified Power (Amplitude) Entry Status .....
Example: Check the Condition of Unspecified Power
Entry .....................
Pager Encoding Status (Option
1EP
Only) ......
Example: Check the end of message encoding ...
Example: Check the start of each frame ......
SCPI Command Reference ...............
ABORt
Subsystem (Option
1EP
Only) ........
AM Subsystem ...................
CAL Subsystem ...................
DM Subsystem (Option 1EP Only) ..........
FM Subsystem ...................
FREQuency Subsystem ...............
INITiate Subsystem (Option
1EP
Only) ........
OUTPut Subsystem .................
PAGing
Subsystem (Option
1EP
Only) ........
PM Subsystem . . . . . . . . . . . . . . . . . . .
.....
lb-60
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lb-61
lc-1
lc-5
lc-7
lc-7
lc-7
lc-8
2-l
2-2
2-2
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2-2
2-2
2-2
2-2
2-2
2-3
2-3
2-3
2-4
2-4
2-4
2-5
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2-19
2-20
2-21
2-21
2-22
2-22
2-23
2-24
2-24
2-24
2-25
2-37
Contents-4
POWer
Subsystem
PULM Subsystem
STATUS
SYSTem
Subsystem
Subsystem
TRIGger Subsystem (Option
Changing Parameters While Encoding (Option
.................
..................
.................
.................
1EP
Only)
........
1EP
Using the Buffer Memory for the Arbitrary Messages . .
HP-IB Capabilities
HP-IB Connector Information
HP 8656/57 Compatible Language
Program Code Implementation
Receiving the Clear Message
Additional Programming Information
..................
.............
...........
...........
.............
........
3. Installation
Unpacking Your Signal Generator
Connecting AC Power
Power Requirements
Replacing the Fuse
.................
................
.................
Turning On the Signal Generator
Connecting to Other Instruments
Storing the Signal Generator
Shipping the Signal Generator
...........
...........
...........
.............
.............
4. Specifications
Options
Frequency Specifications
Internal Reference Oscillator
output
Spectral Purity
Frequency Modulation
Phase Modulation
Amplitude Modulation
Modulation Source
Remote Programming
Environmental
General
Modulation Generator Option 1 E2
Pulse Modulation Option
Pager Encoder/Signaling Option 1 EP
Frequency
Frequency Modulation
Pager Signaling
Modulation Source
General
Regulatory Information
IS0 9002 Compliant
Statement of Compliance
Noise Declaration
.......................
...............
.............
........................
....................
................
...................
................
..................
.................
....................
.......................
...........
.............
lE6
..........
.....................
...............
...................
.................
......................
................
.................
..............
..................
only)
2-38
2-38
2-39
2-40
2-40
2-41
2-41
2-43
2-44
2-45
2-46
2-48
2-48
3-l
3-2
3-2
3-3
3-5
3-5
3-5
3-6
4-1
4-2
4-2
4-3
4-4
4-5
4-6
4-7
4-8
4-8
4-9
4-9
4-10
4-11
4-11
4-11
4-12
4-12
4-12
4-12
4-13
4-13
4-13
4-13
Contents-5
5. Service
Shipping Your Instrument Back to Hewlett-Packard . . .
Recommended Test Equipment . . . . . . . . . . . .
Post-Repair . . . . . . . . . . . . . . . . . . . . . .
Safety Notes . . . . . . . . . . . . . . . . . . . . .
5a. Theory of Operation
Introduction
Overview
Al Front Panel
A2 Power Supply
A3 Motherboard
A4 Reference
A5 Sig Gen Synth
A6 Output (HP 8648A)
A6 Output (HP
A7 Attenuator (HP 8648A)
A10 Frequency Extension (HP
Al 1 Attenuator (HP
Al2 Reverse Power Protection (HP
Al3 Pulse Modulator (HP
Al4 Modulation Generator (Option
A30 Pager Encoder (HP 8648A Option
.....................
.....................
...................
..................
..................
...................
..................
...............
8648B/C/D)
.............
.............
8648B/C/D)
8648B/C/D)
...........
8648B/C/D)
8648B/C/D
Option
lE2)
.......
1EP)
5b. Troubleshooting Information
Introduction
Troubleshooting Checklist
.....................
...............
AC Mains (line) Fuse Removal .............
lb
Remove the Fuse
................
Modulation Test Points and Power Supply LEDs
Power Supply Distribution ..............
Block Diagrams
....................
......
....
lE6)
...
.....
.....
5-l
5-2
5-5
5-8
5a-1
5a-3
5a-3
5a-5
5a-5
5a-6
5a-6
5a-7
5a-7
5a-7
5a-8
5a-8
5a-8
5a-9
5a-9
5a-9
5b-1
5b-2
5b-3
5b-3
5b-4
5b-5
5b-7
Contents-6
5~.
Service Error Messages
6. Replaceable Parts
Introduction . . . . . . . . . . . . . . . . . . . . .
Assembly Replacements . . . . . . . . . . . . . . .
7. Adjustments
Test Equipment ....................
Equipment Setup for Automated Tests
Test Point Extender
.................
........ 7-l
Manual Adjustments .................
Internal Reference Oscillator Adjustment
.......
Pager Encoder Timebase Frequency Adjustment
Automated Adjustments ................
AM Level and Distortion
..............
AM Level .....................
Detector Offset
Output Level
AM Level: FE
Predistortion and Detector Offset
Prelevel
......................
...................
....................
...................
..........
Output Level: Frequency Extension Calibration
...
...
6-l
6-l
7-l
7-2
7-3
7-4
7-6
7-8
7-9
7-11
7-13
7-14
7-15
7-17
7-18
7-19
AM Modulator
Time Base DAC
Motherboard Audio Path
DCFM
.......................
Audio Generator
HF Power Level Accuracy
LF Output Level
LF Power Level Accuracy
FSK Deviation
Filter Path
Service Support Software
Required Test Equipment
Installing the Software
Running the Service Support Software
Starting the Software
Identifying the DUT
...................
...................
..............
..................
..............
..................
..............
...................
.....................
...............
..............
...............
........
...............
...............
Selecting the Performance Test or Adjustments and
the Test. ...................
Defining the Location where the Test Results are
Saved ....................
Running the Tests and Adjustments
........
Reviewing the Test and Adjustment Results
Printing the Test and Adjustment Results
Exiting the Software
Support Software Administration
Software Configuration
The User Configuration
The Administration Configuration
Adding Test Equipment
Removing Test Equipment
Editing Test Equipment
Adding Device Drivers
Removing Device Drivers
Adding Test Drivers
Removing Test Drivers
Adding Datapacks
Removing Datapacks
Motherboard Repair Utility
...............
..........
..............
.............
........
..............
.............
..............
..............
.............
................
..............
................
...............
.............
Reading Information from the A3 Motherboard
Storing Information in the A3 Motherboard
....
......
...
....
7-20
7-22
7-23
7-25
7-26
7-27
7-30
7-31
7-33
7-34
7-35
7-35
7-36
7-42
7-42
7-43
7-44
7-46
7-47
7-47
7-49
7-49
7-50
7-50
7-50
7-50
7-51
7-54
7-55
7-56
7-59
7-60
7-62
7-63
7-65
7-66
7-68
7-70
8. Performance Tests
Calibration Cycle
Required Test Equipment
Performance Test Descriptions
FM Accuracy Performance Test
...................
...............
.............
...........
FM Accuracy Performance Test (Option
FM Distortion Performance Test
AM Accuracy Performance Test
...........
...........
AM Accuracy Performance Test (Option lE2 only)
AM Distortion Performance Test
...........
Phase Modulation Distortion Performance Test
Residual FM Performance Test
Harmonics Performance Test
Spurious Performance Test
............
............
.............
lE2
Only)
. .
. .
....
Contents-7
8-l
8-2
8-5
8-6
8-8
8-10
8-12
8-13
8-14
8-15
8-17
8-19
8-20
DC FM Frequency Error Performance Test . . . . . .
RF Level Accuracy Performance Test . . . . . . . . .
Pulse Modulation On/Off Ratio Performance Test
(Option
lE6
Only) . . . . . . . . . . . . . . . .
Pulse Modulation Rise Time Performance Test (Option
lE6
Only) . . . . . . . . . . . . . . . . . . . .
Pager Encoder Timebase Accuracy Performance Test
(Option 1EP Only) . . . . . . . . . . . . . . . .
FSK Deviation Accuracy Performance Test (Option
Only) . . . . . . . . . . . . . . . . . . . . . .
Internal Timebase: Aging Rate Performance Test
(Option
lE5
Only) . . . . . . . . . . . . . . . .
Power Level Accuracy Performance Test (Automated) .
HP 8648A Test Record . . . . . . . . . . . . . . .
HP
8648B
Test Record . . . . . . . . . . . . . . .
HP 8648C Test Record . . . . . . . . . . . . . . .
HP 8648D Test Record . . . . . . . . . . . . . . .
9. Supplemental Verification Tests
Required Test Equipment List . . . . . . . . . . . . .
CW Frequency Accuracy Supplemental Verification Test
9 kHz RF Level Accuracy Supplemental Verification Test
Index
8-21
8-22
8-26
8-27
8-29
1EP
8-30
8-35
8-38
8-41
8-61
8-85
8-109
9-2
9-3
9-8
Contents-l
Figures
2-l. HP 8648 Status Register Model
2-2. Paging Encoding Status
3-l. Replacing the Fuse
...............
.................
3-2. Power Cable and Mains Plug
4-l. Typical Output Power with Option
5a-1.
HP 8648A Simplified Block Diagram
5a-2.
HP
8648B/C/D
5b-1.
Fuse Removal
5b-2.
Location Diagram
5b-3.
Bottom View of Motherboard with Cover Removed . .
5b-4.
HP 8648A Block Diagram
5b-5.
HP
8648A
Simplified Block Diagram
...................
..................
..............
Option
1EP
A30 Pager Encoder Block
...........
............
1EA
.......
.........
.......
Diagram ....................
5b-6.
HP 8648A Option
lE2
Al4 Modulation Generator Block
Diagram ....................
5b-7.
HP
8648B/C/D
Block Diagram (1 of 2)
6-l. HP 8648A Replaceable Parts
6-2. HP
6-3. HP
8648B/C/D
8648B/C/D
Replaceable Parts
Replaceable Parts -
.............
...........
........
All/A12/A13/A14
Detailed View ..................
7-l.
531
Test Point Extender
7-2. Timebase Adjust Switch Location
7-3. Internal Reference Oscillator Adjustment Setup
...............
..........
....
7-4. Pager Encoder Timebase Frequency Adjustment Setup
7-5. Variable Capacitor Location
7-6. AM Level and Distortion Test Setup 1
7-7. AM Level and Distortion Test Setup 2
7-8. Location of
530,
531, and
7-9. AM Level Test Setup 1
7-10. AM Level Test Setup 2
7-11. Location of
531
and
532
7-12. Detector Offset Test Setup
7-13. Output Level Test Setup
7-14. AM Level: FE Test Setup 1
7-15. AM Level: FE Test Setup 2
7-16. Location of
531
and
532
7-17. Predistortion and Detector Offset Test Setup
7-18. Prelevel Test Setup
.................
.............
........
........
532
on the Motherboard
...............
...............
on the Motherboard
.....
..............
..............
.............
.............
on the Motherboard
.....
.....
7-19. Output Level: Frequency Extension Calibration Test
Setup ......................
7-20. AM Modulator Test Setup
7-21. Location of
531
on the Motherboard
7-22. Time Base DAC Test Setup
7-23. Motherboard Audio Path Test Setup
7-24. DCFM Test Setup
..................
7-25. Audio Generator Test Setup
..............
.........
.............
.........
.............
. .
2-13
2-18
3-3
3-4
4-3
5a-1
5a-2
5b-3
5b-4
5b-5
5b-7
5b-9
5b-9
5b-11
6-3
6-9
B-11
7-3
7-4
7-4
7-6
7-7
7-9
7-9
7-10
7-11
7-11
7-12
7-13
7-14
7-15
7-15
7-16
7-17
7-18
7-19
7-20
7-21
7-22
7-24
7-25
7-26
Contents-9
7-26. HF Power Level Accuracy Test Setup for Power Levels
>-10dBm
...................
7-27. HF Power Level Accuracy Test Setup for Power Levels
of-lOto-70dBm
...............
7-28. HF Power Level Accuracy Test Setup for Power Levels
< -70 dBm and < 1300 MHz ...........
7-29. HF Power Level Accuracy Test Setup for Power Levels
< -70 dBm and > 1300 MHz ...........
7-30. LF Output Level Test Setup .............
7-31. LF Power Level Accuracy Test Setup for Power Levels
of?-40dBm
.................
7-32. LF Power Level Accuracy Test Setup for Power Levels
of<-40dBm .................
7-33. FSK Deviation Test Setup ..............
7-34. Filter Path Test Setup ................
7-35. Welcome Screen ..................
7-36. Important Information Screen ............
7-37. Choose Destination Location Screen .........
7-38. Select Program Folder Screen ............
7-39. Start Copying Files Screen .............
7-40. Installation Status Gauge ..............
7-41. Setup Complete Screen ...............
7-42. Setup Complete Screen ...............
7-43. HP Service Support Program Group .........
7-44. HP Service Software for PC’s Selections .......
7-45. User Information Dialog Box ............
7-46. DUT Selection Dialog Box ..............
7-47. Select Test Equipment and Tests Window .......
7-48. Save As Dialog Box .................
7-49. HP Service Support Software Window ........
7-50. HP Service Support Software Window Displaying Test
Results .....................
7-51. Print the Log File? Dialog Box ...........
7-52. The User Information Window ............
7-53. Test Equipment Drivers in the File Drop-Down Menu .
7-54. Adding Test Equipment Using the Test Equipment Menu
7-55. Adding the Equipment Information Using the New Test
Equipment Window ...............
7-56. Removing and Editing Test Equipment Using the Test
Equipment Window ...............
7-57. The Select Test Equipment and Tests Window ....
7-58. Test Equipment Drivers in the File Drop-Down Menu .
7-59. Adding a Device Driver Using the Test Equipment
Drivers Window .................
7-60. Using the Open Dialog box to Search for a Device
Driver File to Add ................
7-61. Removing a Device Driver Using the Test Equipment
Drivers Window .................
7-62. Test Drivers in the File Drop-Down Menu ......
7-63. Adding a Test Driver Using the Test Drivers Window
7-64. Using the Open Dialog Box to Search for a Test Driver
File to Add ...................
7-65. Removing a Test Driver Using the Test Drivers Window
7-66. Datapacks in the File Drop-Down Menu .......
7-67. Adding a
Datapack
Using the Datapacks Window . . .
7-27
7-28
7-28
7-29
7-30
7-31
7-32
7-33
7-34
7-36
7-37
7-38
7-38
7-39
7-39
7-40
7-40
7-42
7-42
7-43
7-43
7-44
7-46
7-47
7-47
7-49
7-50
7-51
7-52
7-53
7-54
7-56
7-57
7-57
7-58
7-59
7-60
7-61
.
7-61
7-62
7-63
7-64
Contents-l
0
7-68. Using the Open Dialog Box to Search for a
File to Add
7-69. Removing a
7-70. 110 Port Error Message
...................
Datapack
Using the Datapacks Window
...............
7-71. HP Service Support Program Group
Datapack
.........
7-72. HP Service Software for PC’s Selections .......
7-73. Password Requested by User Information Dialog Box .
7-74. HP8648 Motherboard Repair Utility Window .....
7-75. HP Service Support Program Group
.........
7-76. HP Service Software for PC’s Selections .......
7-77. Password Requested by User Information Dialog Box .
7-78. HP8648 Motherboard Repair Utility Window .....
8-l. FM Accuracy Equipment Setup
8-2. FM Accuracy Equipment Setup for HP
8-3. FM Accuracy Equipment Setup for Option
8-4. FM Accuracy Equipment Setup for HP
Option
lE2
...................
8-5. FM Distortion Equipment Setup
8-6. FM Distortion Equipment Setup for HP
8-7. AM Accuracy Equipment Setup
8-8. AM Accuracy Equipment Setup for Option
8-9. AM Distortion Equipment Setup
...........
8648B/C/D
lE2
. .
....
8648B/C/D
...........
8648B/C/D
. .
...........
lE2
....
...........
8-10. Phase Modulation Distortion Equipment Setup ....
8-11. Phase Modulation Distortion Equipment Setup for HP
8648B/C/D
8-12. Residual FM Equipment Setup
8-13. Harmonics Equipment Setup
8-14. Spurious Equipment Setup
...................
............
............
.............
8-15. DC FM Frequency Error Equipment Setup ......
8-16. Equipment Setup for the HP 8648A and HP
5 1300MHz.
8-17. Equipment Setup for the HP
..................
8648B/C/D
8648B/C/D
> 1300 MHz .
8-18. Pulse Modulation On/Off Ratio Equipment Setup. ...
8-19. Pulse Modulation On/Off
Risetime
Equipment Setup.
.
8-20. Pager Encoder Timebase Accuracy Equipment Setup .
8-21. FSK Deviation Accuracy Equipment Setup ......
8-22. Internal Timebase: Aging Rate Test Setup ......
8-23. HF Power Level Accuracy Test Setup Setup for Power
Levels > -10 dBm
...............
8-24. HF Power Level Accuracy Test Setup for Power Levels
of-lOto-70dBm
...............
8-25. HF Power Level Accuracy Test Setup for Power Levels
< -70 dBm and 5 1300 MHz
...........
8-26. HF Power Level Accuracy Test Setup for Power Levels
< -70 dBm and > 1300 MHz
9-
1. Frequency Accuracy Equipment Setup
...........
........
9-2. 9 kHz RF Level Accuracy Equipment Setup .....
.
7-64
7-65
7-67
7-68
7-68
7-69
7-69
7-70
7-70
7-71
7-72
8-6
8-7
8-8
8-9
8-10
8-11
8-12
8-13
8-14
8-15
8-16
8-17
8-19
8-20
8-21
8-22
8-23
8-26
8-27
8-29
8-30
8-36
8-38
8-39
8-39
8-40
9-3
9-8
Contents-l 1
Ihbles
O-l. Hewlett-Packard Sales and Service Offices ......
2-1. Programming Command Statements and Descriptions .
2-2. Dictionary of Terms .................
2-3. IEEE 488.2 Capabilities ...............
5
1. Recommended Test Equipment ...........
5-2. Adjustments and Performance Tests Required after
Repair or Replacement of an HP 8648A Assembly .
5-3. Adjustments and Performance Tests Required after
Repair or Replacement of an HP
Assembly ....................
5a-1.
Al Front Panel (Keyboard) .............
6-l. HP 8648A Replaceable Parts .............
6-2. HP
7-l.
7-2. An Example of Calibration Data for Power Sensors . .
8-l. High Power Level Accuracy Work Table .......
8-2. FSK Deviation Accuracy Work
8-3. HP 8648A Test Record ...............
8-4. HP 8648A Test Record ...............
8-5. FM Accuracy Performance Test ...........
8-6. FM Accuracy Performance Test Option
8-7. FM Distortion Performance Test ...........
8-8. AM Accuracy Performance Test ...........
8-9. AM Accuracy Performance Test Option
8-10. AM Distortion Performance Test ...........
8-l 1. Phase Modulation Distortion Performance Test ....
8-12. Residual FM Performance Test ............
8-13. Harmonics Performance Test .............
8-14. Spurious Performance Test .............
8-15. DC FM Frequency Error Performance Test ......
8-16. RF Level Accuracy Performance Test .........
8-17. Pager Encoder Timebase Accuracy Performance Test
8-18. FSK Deviation Accuracy Performance Test (Option
8-19. Internal Timebase: Aging Rate Performance Test
8-20. HP 8648B Test Record ...............
8-21. HP 8648B Test Record ...............
8-22. FM Accuracy Performance Test - Part 1 .......
8-23. FM Accuracy Performance Test - Part 2 .......
8-24. FM Accuracy Performance Test Option
8-25. FM Accuracy Performance Test Option
8-26. FM Distortion Performance Test - Part 1 .......
8-27. FM Distortion Performance Test - Part 2 .......
8-28. AM Accuracy Performance Test ...........
8648B/C/D
531
Test Point Extender Parts List ..........
(Option
Only) ......................
(Option
Replaceable Parts ...........
1EP
Only) ................
lE5
Only) ................
Table
8648B/C/D
.........
lE2
......
lE2
lE2 -
lE2 -
.....
1EP
Part 1 . .
Part 2 . .
2-i
2-20
2-43
5-2
5-5
5-6
5a-4
6-5
6-13
7-2
7-53
8-25
8-33
8-41
8-42
8-43
8-44
8-45
8-46
8-48
8-50
8-51
8-51
8-52
8-53
8-54
8-55
8-60
8-60
8-60
8-61
8-62
8-63
8-63
8-64
8-64
8-65
8-65
8-66
Contents-l 2
8-29. AM Accuracy Performance Test Option
8-30. AM Distortion Performance Test . . . . . . . . . . .
8-31. Phase Modulation Distortion Performance Test - Part 1
8-32. Phase Modulation Distortion Performance Test - Part 2
8-33. Residual FM Performance Test . . . . . . . . . . . .
8-34. Harmonics Performance Test . . . . . . . . . . . .
8-35. Spurious Performance Test . . . . . . . . . . . . .
8-36. DC FM Frequency Error Performance Test . . . . . .
8-37. RF Level Accuracy Performance Test - Part 1 . . . . .
8-38. RF Level Accuracy Performance Test - Part 2 . . . . .
8-39. RF Level Accuracy Performance Test - Part 3 . . . . .
8-40. RF Level Accuracy Performance Test with Options
andlE6-Part3.
8-41. RF Level Accuracy Performance Test - Part 4 . . . . .
8-42. Pulse Modulation On/Off Ratio Performance Test
(Option
8-43. Pulse Modulation Rise Time Performance Test (Option
lE6
8-44. Internal Timebase: Aging Rate Performance Test
(Option
8-45. HP 8648C Test Record . . . . . . . . . . . . . . .
8-46. HP 8648C Test Record
8-47. FM Accuracy Performance
8-48. FM Accuracy Performance Test - Part 2
8-49. FM Accuracy Performance Test Option
8-50. FM Accuracy Performance Test Option
8-51. FM Distortion Performance Test - Part 1 . . . . . . .
8-52. FM Distortion Performance Test - Part 2 . . . . . . .
8-53. AM Accuracy Performance Test . . . . . . . . . . .
8-54. AM Accuracy Performance Test Option lE2
8-55. AM Distortion Performance Test . . . . . . . . . . .
8-56. Phase Modulation Distortion Performance Test - Part 1
8-57. Phase Modulation Distortion Performance Test - Part 2
8-58. Residual FM Performance Test . . . . . . . . . . . .
8-59. Harmonics Performance Test . . . . . . . . . . . .
8-60. Spurious Performance Test . . . . . . . . . . . . .
8-61. DC FM Frequency Error Performance Test . . . . . .
8-62. RF Level Accuracy Performance Test - Part 1 . . . . .
8-63. RF Level Accuracy Performance Test - Part 2 . . . . .
8-64. RF Level Accuracy Performance Test - Part 3 . . . . .
8-65. RF Level Accuracy Performance Test with Options
andlE6-Part3.
8-66. RF Level Accuracy Performance Test - Part 4 . . . . .
8-67. Pulse Modulation On/Off Ratio Performance Test
(Option
8-68. Pulse Modulation Rise Time Performance Test
(Option
8-69. Internal Timebase: Aging Rate Performance Test
(Option lE5 Only) . . . . . . . . . . . . . . . .
8-70. HP 8648D Test Record . . . . . . . . . . . . . . .
8-71. HP 8648D Test Record . . . . . . . . . . . . . . .
8-72. FM Accuracy Performance Test - Part 1
8-73. FM Accuracy Performance Test - Part 2
8-74. FM Accuracy Performance Test Option
8-75. FM Accuracy Performance Test Option
lE6
Only) . . . . . . . . . . . . . . . . . . . .
lE5
lE6
lE6
. . . . . . . . . . . . . . . .
Only) . . . . . . . . . . . . . . . .
Only) . . . . . . . . . . . . . . . .
Test’- Part
. . . . . . . . . . . . . . . .
Only) . . . . . . . . . . . . . . . .
Only) . . . . . . . . . . . . . . . .
lE2
‘1 ’ : 1 : : : :
lE2 lE2 -
lE2 -
lE2 -
. . . . .
1EA
. . . . . . .
Part 1 . .
Part 2 . .
. . . . .
1EA
. . . . . . .
. . . . . . .
Part 1 . .
Part 2 . .
:
8-68
8-70
8-71
8-71
8-71
8-72
8-73
8-74
8-75
8-81
8-81
8-82
8-82
8-82
8-83
8-83
8-85
8-86
8-87
8-87
8-88
8-88
8-89
8-89
8-90
8-92
8-94
8-95
8-95
8-95
8-96
8-97
8-98
8-99
8-105
8-106
8-106
8-107
8-107
8-108
8-108
8-109
8-110
8-111
8-111
8-112
8-112
Contents-13
8-76. FM Distortion Performance Test - Part 1
8-77. FM Distortion Performance Test - Part 2
8-78. AM Accuracy Performance Test
...........
8-79. AM Accuracy Performance Test Option
8-80. AM Distortion Performance Test
...........
.......
.......
lE2
.....
8-81. Phase Modulation Distortion Performance Test - Part 1
8-82. Phase Modulation Distortion Performance Test - Part 2
8-83. Residual FM Performance Test
8-84. Harmonics Performance Test
8-85. Spurious Performance Test
8-86. DC FM Frequency Error Performance Test
8-87. RF Level Accuracy Performance Test - Part 1
8-88. RF Level Accuracy Performance Test - Part 2
8-89. RF Level Accuracy Performance Test - Part 3
8-90. RF Level Accuracy Performance Test with Options
andlE6-Part3.
................
8-91. RF Level Accuracy Performance Test - Part 4
............
............
.............
......
.....
.....
.....
1EA
.....
8-92. Pulse Modulation On/Off Ratio Performance Test
(Option
lE6
Only) ................
8-93. Pulse Modulation Rise Time Performance Test
(Option
lE6
Only) ................
8-94. Internal Timebase: Aging Rate Performance Test
(Option
9-
1. HP 8648A Frequency Accuracy Supplemental
lE5
Only) ................
Verification Test .................
9-2. HP 8648B Frequency Accuracy Supplemental
Verification Test .................
9-3. HP 8648C Frequency Accuracy Supplemental
Verification Test .................
9-4. HP
86481)
Frequency Accuracy Supplemental
Verification Test .................
9-5. HP 8648A Option
Supplemental Verification Test
9-6. HP 8648B Option
Supplemental Verification Test
9-7. HP 8648C Option
Supplemental Verification Test
lE5
Frequency Accuracy
lE5
Frequency Accuracy
lE5
Frequency Accuracy
..........
..........
..........
9-8. HP 8648D Option lE5 Frequency Accuracy
Supplemental Verification Test
..........
9-9. HP 8648B 9 kHz RF Level Accuracy Supplemental
Verification Test .................
9-10.
HP 8648C 9 kHz RF Level Accuracy Supplemental
Verification Test .................
9-l 1. HP 8648D 9 kHz RF Level Accuracy Supplemental
Verification Test .................
8-113
8-114
8-115
8-116
8-117
8-117
8-118
8-118
8-119
8-120
8-121
8-122
8-128
8-129
8-129
8-130
8-131
8-131
8-131
9-4
9-4
9-5
9-5
9-6
9-6
9-7
9-7
9-9
9-9
9-10
Contents-14
Operation
“Operation” contains the following information:
1 Operation Provides a quick overview of the instrument’s
operation.
la Operation
Examples
lb Operation
Reference the instrument’s functions.
lc Operation
Messages HP-IB remote operation messages.
Provides examples to help you learn how to
operate the instrument.
Provides quick access to information about each of
Provides information about both front-panel and
1
Note
For information about service messages numbered 500 and above,
refer to Chapter
5c,
“Service Error Messages.”
Operation l-l
Quick Overview
1. Power Key
2. Display
234
Press
s
HP
8648 Signal Generator
(i%iK)
to power up the instrument. The instrument powers up
7
to the same state it was in when power was turned off, except that
the RF output will be turned off and the digit-select arrow keys
(@
and
a)
will be reset to the least significant digit.
The display can be one of two displays depending on the serial
number prefix of your instrument as illustrated below.
4
,\FRfgUENCY -
MCOUAIION -
AMPUI~E
I
A
/
B
4
FREQUENCY -
MCOUATION -
AMPUIUDE -
/
,
1-2 Operation
ot77a
The following table describes the prefixes that apply to the various HP
8648 models equipped with an LCD.
A. Liquid Crystal Display (LCD)
(labels located above the
display)
BP 8648A BP 8648B
Prefix Preflx
3636A and below 3623A and below 3623A and below 3613A and below
3643U and below 3642U and below 3642U and below 3642U and below
The display contrast of the LCD can be achieved using the adjustment
that is located on the rear panel of these instruments. Note that this
adjustment is only available for instruments equipped with an LCD.
It allows you to adjust the contrast of the LCD. Turn the adjustment
to optimize the display for viewing from most angles. If the display is
blank, first attempt to adjust the display contrast before returning the
instrument for service.
The following table describes the prefixes that apply to the various HP
8648 models equipped with a VFD.
B. Vacuum Fluorescent Display (VFD)
(labels located below the
BP 8648A BP 8648B BP 8648C
Prefix Prefix Prefix Prefix
3836A and above 3836A and above 3836A and above 3836A and above
BP 8648C
Prefix
display)
BP 8648D
Prefix
ElP
8648D
3. Function and Data Keys
3836U and above 3836U and above 3836U and above 3836U and above
The VFD is a 2x40 display. The intensity of the this display is at 100
% and cannot be adjusted.
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.
If Option
pager encoder (ENCODER) mode and FM mode.
If Option
mode, the
input alphabetical characters using the DATA and MODULATION
SOURCE blocks when you are in pager encoder mode.
If Option
mode, the
key must be used to store any numeric or alphabetic characters
entered by way of the DATA and MODULATION source blocks.
I
1EP
is present, the [FM) (ENCODER) key will toggle between
1EP
is present and the signal generator is in the ENCODER
L-j
1EP
(jjdB(ml)
key functions as a SHIFT key. This key lets you
is present and the signal generator is in the ENCODER
key functions as an ENTER key. The ENTER
I
I
Operation 1-3
4. Increment Set Keys
When you press a FUNCTION key, that function becomes the active
function. Press
the active function. Press @) or @J at any time to change the active
function setting by the increment value. (If Option
and the signal generator is in the ENCODER mode, these keys have
alternate functions.)
(‘NCR]
to view or change the increment value for
1EP
is present
5. Knobs
6. MEMORY
If Option
mode, the
starts or stops any pager encoding activity. In addition, in this mode,
the
move the blinking cursor between each parameter when you are
entering the pager encoding settings.
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 a or
adjust the knob’s resolution.
Press
reference value and turn on the reference mode. Press (REF ON/OFF) to
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.
If Option 1EP is present and the signal generator is in the ENCODER
mode, the AMPLITUDE/ENCODER knob is used to enter a setting for
a pager encoding parameter.
Memory registers allow you to save instrument set-ups and recall
them whenever you wish. Press
number to save the instrument’s current settings.
settings, press
allow you to recall registers in numerical sequence. You can arrange
your registers in up to ten different sequences.
(jjj
and
@GZQ,
1EP
is present and the signal generator is in the ENCODER
(jj]
(7J-J
key functions as a START/STOP key. This key
function as PREV and NEXT keys. These keys let you
(ZJ
next to each knob, to
next to each knob, to set the displayed value as the
a
and enter a two-digit register
‘Ib
recall the
(REG)
and enter the register number. The arrow keys
1-4 Operation
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.
(If Option
on any pager encoding menu.) 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.
1EP
is present, the sequence and register are not displayed
7. Modulation Source
Press
CMOD
ON/OFF) to turn on or off the modulation source. Press
@KiZiG@
or
@i7iiKJ
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
C-1
or
[EXTDC)
to ac- or dc-couple an external
audio source via the MOD INPUT/OUTPUT port.
Press
(1kt-b
+ 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.)
ClkHz
+ EXT
DC)
will also amplitude or phase
modulate the RF signal with the internal 1 kHz tone but it will not be
dc-coupled.
If Option 1EP is present, the
Option
lE2
is present, the
[@7iiK]
(NTIkHz)
(FREQUENCY) key, or if
(FREQUENCY/WAVEFORM)
key scrolls between five states: a fixed 1 kHz internal source and a
variable-frequency internal source with four different waveform
selections. The four modulation waveforms are sine, triangle, square,
and sawtooth (or ramp).
Operation
l-5
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. The pager testing example can
only be performed if Option 1EP is present.
la
Getting 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’s remaining 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 lc, “Operation Messages.”
Operation Examples la-l
Operation Examples
This section provides the following examples of signal generator
operation. The item numbers of the operation examples correspond to
the numbers called out on drawing of the instrument front panel.
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
6. Setting a User Selectable Modulated
(Option
lE2
or
1EP
Only)
Freauency
7. Signaling a Numeric-Type FLEX Pager (Option
YcnnJLATIoN
SOURCE
RF
OUTPUT
A
and Waveform
1EP
Only)
“*Lu”
\
la-2 Operation Examples
an622a2d
Setting the RF Output Signal
In this example, you will set the frequency, amplitude, and modulation
level of the RF output signal.
Setting the Frequency
/
Setting the Amplitude
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 a to correct
it.
J
\
FREQUENCY
100.00000 MHz
2. Set the amplitude to -100 dBm.
-
MODUfATlON -
AMP-
fund1
.drw
4
J
funcfZ.dw
Operation Examples la-3
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