Agilent Technologies Agilent 4396B Operating instructions

Agilent 4396B Network/Spectrum/Impedance Analyzer
GPIB Programming Guide
SERIAL NUMBERS
This manual applies directly to instruments with serial number prex JP1KE.
F
or additional important information about serial
numbers
,read \Serial Number" in Appendix A.
Agilent Part No. 04396-90063
Printed in Japan May 2003
Sixth Edition

Notice
The information contained in this document is subject to change without notice
.
This document contains proprietary information that is protected by copyright. All rights are
reserved. No part of this document may be photocopied, reproduced, or translated to another
language without the prior written consent of the Agilent T
echnologies.
Agilent T
echnologies Japan, Ltd.
Component T
est PGU-Kobe
1-3-2, Murotani, Nishi-ku, Kobe-shi,
Hyogo
,651-2241 Japan
c
 Copyright 1997, 1998, 2000, 2002, 2003 Agilent Technologies Japan, Ltd.

Manual Printing History
The manual's printing date and part number indicate its current edition. The printing date
changes when anew edition is printed. (Minor corrections and updates that are incorporated
at reprint do not cause the date to change.) The manual part number changes when extensive
technical changes are incorporated.
March 1997
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::
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First Edition (part number: 04396-90023)
July 1997
::::
::
::
::
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::
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Second Edition (part number: 04396-90033)
March 1998
:::::: ::::
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Third Edition (part number: 04396-90043)
March 2000
:::::: :: :: :::::::::::::::::::
::
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F
ourth Edition (part number: 04396-90043)
November 2002
::
::
::
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Fifth Edition (part number: 04396-90053)
May 2003
::
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Sixth Edition (part number: 04396-90063)
iii

Typeface Conventions
Bold
Boldface type is used when aterm is dened. F
or example:
icons are
symbols
.
Italics
Italic type is used for emphasis and for titles of manuals and other
publications
.
Italic type is also used for keyboard entries when aname or a variable
must be typed in place of the words in italics
.For example:
copy
lename
means to type the word
copy
,to
type a space, and then to
type the name of ale such as
file1
.
Computer
Computer font is used for on-screen prompts and messages.
4
HARDKEYS
5
Labeled keys on the instrument front panel are enclosed in
45
.
NNNNNNNNNNNNNNNNNNNNNNNNNN
SOFTKEYS
Softkeys located to the right of the CRT are enclosed in
NNNNN
.
Graphic Symbols
General denitions of other graphic symbols used in manuals.
COMPUTER
denotes information for aprogrammer using an external
computer as the system controller
.
iB
ASIC
denotes information for aprogrammer using an analyzer with
Instrument B
ASIC as the system controller
.
iv

How to Use This Manual
This manual provides an introduction to writing B
ASIC programs for the 4396B
Network/Spectrum Analyzer (analyzer). T
o reduce the time required for you to learn how to
write programs for the analyzer, the examples shown in this guide are supplied on sample
disks
.Y
ou can perform each example sequentially or you can select the examples that apply to
your immediate needs and learn those techniques. Use the table of contents and the index to
quickly locate these examples
.
Also
,depending upon your experience in writing BASIC programs using GPIB commands
,you
may want to do one of the following:
1. If you are an experienced programmer and have programmed GPIB systems before
,you can
scan the examples in this guide to nd out how the analyzer can be used in your system.
If you have never programmed an instrument similar to the analyzer
,you can start at the
beginning and do the examples that apply to your application.
2. If you are an experienced programmer, but do not have any knowledge of GPIB commands
,
review some examples to decide where you need help
.See the
GPIB Command R
eference
for additional information on GPIB commands.
3. If you are not an experienced programmer and you do not have any knowledge of GPIB
commands
,see the
GPIB Command R
eference
for alist of the documentation that you will
need to review before using this guide
.
The analyzer can also use Instrument B
ASIC. Documentation for Instrument B
ASIC and the
other manuals available for the analyzer is listed in the Documentation Map on the next page
.
v

Documentation Map
The following manuals are available for the analyzer
.
User's Guide (Agilent P
art Number 04396-900x1
1
)
The User's Guide walks you through system setup and initial power-on, shows how to
make basic measurements
,explains commonly used features
,and typical application
measurement examples
.After you receive your analyzer
,begin with this manual.
T
ask Reference (Agilent P
art Number 04396-900x0
1
)
T
ask Reference helps you to learn how to use the analyzer
.This manual provides simple
step-by-step instructions without concepts
.
Function Reference (Agilent P
art Number 04396-900x2
1
)
The Function Reference describes all function accessed from the front panel keys and
softkeys
.It also provides information on options and accessories available
,specications
,
system performance
,and some topics about the analyzer's features
.
Programming Guide (Agilent Part Number 04396-900x3
1
)
The Programming Guide shows how to write and use B
ASIC program to control the
analyzer and describes how Instrument BASIC works with the analyzer
..
GPIB Command Reference (Agilent P
art Number 04396-900x4
1
)
The GPIB Command Reference provides a summary of all available GPIB commands
.It
also provides information on the status reporting structure and the trigger system (these
features conform to the SCPI standard).
Option 010 Operating Handbook (Agilent P
art Number 04396-900x6
1
)
The option 010 Operation Handbook describes the unique impedance measurement
functions of the 4396B with option 010.
Instrument B
ASIC Manual Set (Agilent P
art Number 04155-90151(E2083-90000))
The Instrument B
ASIC User's Handbook introduces you to the Instrument B
ASIC
programming language
,provide some helpful hints on getting the most use from it, and
provide ageneral programming reference
.It is divided into three books
,
Instrument
B
ASIC Programming T
echniques
,
Instrument B
ASIC Interface Techniques
,and
Instrument B
ASIC Language R
eference
.
P
erformance T
est Manual (Agilent P
art Number 04396-901x0
1
)
The P
erformance T
est Manual explains how to verify conformance to published
specications.
Service Manual (Agilent P
art Number 04396-901x1
1
)
The Service Manual explains how to adjust, troubleshoot, and repair the instrument.
This manual is option 0BW only
.
1 The number indicated by \x" in the part number of each manual, is allocated for numbers increased by one each
time a revision is made
. The latest edition comes with the product.
vi

Contents
1. Learning GPIB Remote Control Basics
Required Equipment .................
..
..
..
......1-1
T
oPrepare for GPIB Control ............... .. .. ......1-2
GPIB Commands Introduction ................
..
..
..
..1-4
T
oExecute an GPIB Command ...............
..
..
.....1-4
T
oProgram aBasic Measurement ................... ....1-5
Set I/O P
ath ............... .. ...............1-6
Set Up the Measurement P
arameters ...........
.........1-6
P
erform Calibration ............................1-7
Connect DUT ...............................1-7
Trigger a Measurement . ....................... .. .1-7
P
ost-Processing ................. .. ...........1-8
Transfer Data ................. .. .. ..........1-8
T
oExecute an GPIB Command with aP
arameter ........... ....1-8
T
oExecute aQuery ..............
..
.............1-8
2. Triggering the Analyzer from Remote
T
oMeasure Continuously ...........................2-2
Set Trigger Source ...........
..................2-2
Start Continuous Measurement Sweep ...................2-2
T
oTrigger aMeasurement From the Controller .......
.........2-3
Set Trigger Source .............. ...............2-3
Trigger aMeasurement ...........................2-3
Set Trigger Source ...... ....................... 2-4
Trigger aMeasurement ..
...... ................... 2-4
3. Synchronizing the Analyzer from Remote
T
oW
ait F
or the Preceding Operation to Complete ............... 3-2
Let Controller W
ait F
or Operation to Complete (OPC) .............3-2
T
oW
ait for Sweep End .. ............. .. .. .. .. .. .. .3-3
Enable Sweep-End Bit ......
............
.........3-3
Enable SRQ Interrupt .... .. .. .. ................. 3-4
Wait Until Measurement Is Done .................
..... 3-4
GenerateSRQ .......................... .. .. . 3-4
To Report Command Error Occurrence .................... 3-5
Enable ErrorBit.. .. .. .. .. .. .. .. .. .. .. ........ 3-5
Report Command Error .......................
... 3-6
Output Error ... . .. .. ....................... 3-6
Return to Execute GPIB command ........... .. .. .. .. .. 3-7
Contents-1

4. Reading Measurement Data
T
o Read Data Using the Marker Search Function ....... ..
..
..
..
. 4-2
Search Maximum V
alue .............. .. .. .. .. .. ..4-2
Read Data . ............... .. .. .. .. .. .......4-3
T
oGetMeasurement Trace Using ASCII F
ormat ......... .. .. .. . 4-4
Set the Receive Array .............. .. .. .. .. .. ...4-4
Set Data Transfer F
ormat ...........
..
..
..
........4-5
Read Data ................ .. .. .............4-5
T
oGet Measurement Trace Using Binary F
ormat .......
..
..
..
...4-6
Set the Receive Array .............. .. .. .........4-7
Set Data Transfer F
ormat ...........
..
..
..
........4-7
Read Data ............ .. .. .................4-8
Set the Receive Array .......... .. .. .............4-9
Set Data Transfer F
ormat .........
..
..
............4-10
Read Data .............. .. .................4-10
5. W
riting Data Arrays to the Analyzer
T
oModify Calibration Data .......
..
.................5-1
Read Calibration Data ...........................5-2
Modify Calibration Data ...............
...........5-3
Restore Modied Calibration Data .......
..
..
...........5-3
Redrawing Measurement Trace with Modied Calibration Data ...... .. 5-5
T
oModify Error-Corrected Data ..
.....................5-6
Read Error-Corrected Data ..
..
.....................5-7
Restore Modied Error-Corrected Data . .. ................5-7
T
oModify Trace Data ...........................
.5-8
Read Trace Data ............................. .5-9
Restore Modied Trace Data .....................
...5-9
6. Printing or Plotting the Analyzer's Display
T
o Print Analyzer Display ..................... .. ...6-1
Printer Preparation . ......................... ..6-1
Execute Print .................. .............6-1
T
oObserve Printing .............. .. .. ...........6-1
7. Controlling Instrument B
ASIC from Remote
T
oControl GPIB from Instrument B
ASIC ..........
..
..
..
...7-1
T
oExecute an Instrument B
ASIC Command from the External Controller ..
.. 7-3
T
oRun an Instrument B
ASIC Program From the External Controller .. .. .. 7-4
Open the Instrument B
ASIC Editor . .............
.......7-4
Send the Instrument B
ASIC Program .... .. .. .. .. .. .. .. .. 7-4
Close the Instrument B
ASIC Editor ..................... 7-4
Run the Instrument B
ASIC Program . . . . . . . . . . . . . . . .. .. .. 7-5
To Transfer the Program to Instrument B
ASIC............... .. 7-5
Open the Instrument B
ASIC Editor ................
..... 7-5
Transfer the Program .... .. .. .. . .. .. .. .. ........ 7-6
Close the Instrument B
ASIC Editor ...... .. .. .. .. .. .. .. . 7-6
To Load an Array in an Instrument B
ASIC Program to the External Controller . . 7-6
Transfer the Program Array of Instrument BASIC .............. 7-6
Contents-2

8. Programming Limit Test from Remote
T
oP
erform limit T
est .........
..
..
..
..
..
..
........8-1
Edit Limit Line .............
..
..
..
...... .....8-2
Set Limit Line ............... .. .. .. .. .. ......8-3
Read the Limit T
est Results ............ .. .. ..
..
..
...8-4
9. Using the List Sweep Function
T
oSet List Sweep ...........
..
..
..
.............9-1
Edit List T
able ............
..
..
..
.............9-2
Set List T
able ............
..
..
..
.............9-3
10. Using the Analyzer's I/O P
ort
T
oSynchronize External Handler with Analyzer .....
..
..
..
.....10-2
Send Signal to the External Handler ........
..
..
........10-2
Read Signal from the External Handler .......... .. .......10-3
11. Using Application Programs
T
otal Harmonic Distortion .......... ................11-1
A
djacent Channel P
ower Calculation .....................11-4
Occupied P
ower Bandwidth Calculation ....................11-6
File Transfer Function .......... .. ................11-9
File Transfer from 4396B to External Controller ..
.............11-10
File Transfer from External Controller to 4396B ...............11-12
Displaying List of Files in Current Directory .................11-15
12. If Y
ou Have a Problem
If There Is No Response From an Instrument on the GPIB Bus .........12-1
If an Error Message is Displayed ...................
....12-1
If the Disk Cannot Be Read ....................
......12-2
If the GPIB Command Does Not W
ork .....................12-3
A. Manual Changes
Introduction ................... ..............A
-1
Manual Changes ................ .. .. ...........A
-1
Serial Number .................. .. ............A
-2
Change 1.................. .. ..............A
-3
Index
Contents-3

Figures
1-1. System Conguration for GPIB Remote Control ............... 1-2
1-2. Program Flow .................... .. .. .......1-5
1-3. Sample Program :Basic Measurement (1/2) ................ . 1-5
2-1. Trigger System ..................
..
..
..
......2-1
2-2. Sample Program :T
oTrigger Measurements Continuously ..........2-2
2-3. Sample Program :T
oTrigger aMeasurement from Controller (1) ....... 2-3
2-4. Sample Program :T
oTrigger aMeasurement from Controller (2) ....... 2-4
3-1. SRQ Generation .................. .. ..........3-1
3-2. Sample Program: T
oW
ait for the Preceding Operation to Complete ......3-2
3-3. Sample Program :T
oW
ait for Sweep End ...............
...3-3
3-4. Sweep-End Bit Enabling ..........................3-3
3-5. Sample Program :T
oReport Command Error Occurrence .......... 3-5
3-6. Command-Error Bit Enabling ................... .. .. .3-6
4-1. Sample Program :T
oRead Data Using Marker Search Function ........4-2
4-2. Sample Program :T
oGet Measurement Trace Using ASCII F
ormat ......4-4
4-3. Sample Program :T
oGet Measurement Trace Using IEEE 64-bit Floating P
oint
F
ormat (F
or External Controller) (1/2) ..................4-6
4-4. FORM3 Data Transfer F
ormat ........................4-8
4-5. Sample Program :T
oGet Measurement Trace Using IEEE 64-bit Floating P
oint
F
ormat (F
or Instrument B
ASIC) .....................4-9
5-1. Sample Program :T
oModify Calibration Data (1/2) .............5-1
5-2. Data Arrays
,Data Processing, and GPIB Command ..
..
..........5-5
5-3. Sample Program :T
oModify Error-Corrected Data ..
..
..........5-6
5-4. Sample Program :T
oModify Trace Data ..
..
..............5-8
6-1. Sample Program :T
oObserve Printing . .... .. ............6-2
7-1. P
ass Control .......
..
..
..................... 7-1
7-2. Sample Program: To Receive Control (On Instrument B
ASIC) .........7-2
7-3. Sample Program :T
o Run the Instrument B
ASIC Program From the External
Controller (On External Controller) . ..
..
..............7-4
7-4. Sample Program :T
o Transfer the Program to Instrument B
ASIC (on External
Controller) ........................ .......7-5
7-5. Sample Program : T
o Load Instrument B
ASIC Program Array (on External
Controller) . . . . . .......................... 7-6
8-1. Sample Program : Limit T
est (1/2)... .. .. .. .. .. .. .. .. .. . 8-1
9-1. Sample Program : List Sweep (1/2) .. .. . .. .. .. .. .. .. .. .. 9-1
10-1. I/O P
ort . . . . .. .. .. .. .. .. .. .. .. . .. .. .. .. .. . 10-1
10-2. Sample Program : Synchronization of an External Handler with the Analyzer . 10-2
10-3. 8-Bit Data of OUT0-7 . . . . . . . . . . . . . . .. .. .. .. .. .. .. 10-2
10-4. Sending Signal to an the External Handler . . . . . . . . . . . . .. .. .. 10-2
10-5. Reading Signal from the External Handler . . . . . . . . . . . . . . . . . . 10-3
11-1. Harmonic Distortion in a Signal . . . . . . . . . . . . . . . . . . . . . . . 11-1
11-2. Sample Program : Total Harmonic Distortion (THD) (1/2) . . . . . . . . . . . 11-2
11-3. Adjacent Channel Power.......................... 11-4
11-4. Sample Program : Adjacent Channel Power Calculation (1/2) . . . . . . . . . 11-4
11-5. 99 % Occupied PowerBandwidth...................... 11-6
11-6. Sample Program : Occupied Power Bandwidth Calculation (1/2) .. .. .. . 11-7
Contents-4

11-7. Sample Program: File Transfer from 4396B to External Controller (1/2) ....11-10
11-8. Fixed length block format ............. .. .. .. .. .. ..11-12
11-9. Sample Program: File Transfer from External Controller to 4396B (1/2) .... 11-13
11-10. Sample Program: Displaying List of Files in Current Directory of 4396B .... 11-15
A
-1. Serial Number Plate ...........
..
..
..
..
..
..
.....A
-2
Contents-5

T
ables
A-1. Manual Changes by Serial Number .................. .. . A
-1
A
-2. Manual Changes by Firmware V
ersion ...........
..
..
..
...A
-1
Contents-6

1
Learning GPIB Remote Control Basics
This chapter provides information on how to congure the GPIB remote-control system and the
basic use of the GPIB commands
.In the examples used in this manual, most of the commands
are the simple GPIB commands
.F
or each of these commands
,there is also acorresponding
command that conforms to the Standard Commands for Programmable Instruments (
scpi
)
standard. F
or additional information of about all commands
,see the
GPIB Command R
eference
manual.
What is GPIB?
The General Purpose Interface Bus (
gpib
)is used for remote
control of the 4396B Network/Spectrum/Impedance Analyzer
(analyzer). GPIB is astandard for interfacing instruments to
computers and peripherals
.This standard supports worldwide
standards IEEE 488.1,IEC-625,and IEEE 488.2.The GPIB
interface allows the analyzer to be controlled by an external
computer
.The computer sends commands or instructions to
and receives data from the instrument through the GPIB
.
Required Equipment
T
operform the examples in this manual, you need the following equipment:
1. The analyzer and the accessories required to test aspecic device under test (
dut
).
2. F
or the GPIB system controller
,
If the analyzer has the Instrument B
ASIC installed, it can be used as the system
controller.
Or,
An HP 9000 Series 200 or 300 computer or an HP V
ectra PC with ameasurement
coprocessor or card (82300 or 82324). The computer must have enough memory to
hold B
ASIC, needed binaries
,and at least 64 kilobytes of program space
.
BASIC 3.0 or higher operating system and the following binary extensions:
HPIB, GRAPH, IO
, KBD
, and ERR
A disk drive is required to load B
ASIC, if no internal disk drive is available
.
(Depending on the disk drive
, a binary such as CS80 may be required.)
3. P
eripherals (printer, plotter
, and so on) and any GPIB instruments that are required for your
application.
4. 10833A/B/C/D GPIB cables to interconnect the computer, the analyzer, and any peripherals.
Learning GPIB Remote Control Basics 1-1

To Prepare for GPIB Control
1. Connect the analyzer and controller
,plus any other instruments and peripherals with GPIB
cables
.
Figure 1-1. System Conguration for GPIB Remote Control
*T
oset printer or plotter see Chapter 6.
2. Turn on the analyzer
.
3. Prepare the system controller
.
If you are using only Instrument B
ASIC and no external controller
,prepare the
analyzer for your use
.F
or details
,see
Using Instrument B
ASIC with the 4396B
.
If you are using a computer as an external controller
,
a. Set the analyzer to addressable only mode
.
Press 4
Lo cal
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
ADDRESSABLE ONLY
.
b. Set GPIB address of the analyzer to 17.
Press 4
Lo cal
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SET ADDRESS
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
ADDRESS: 4396 4
1
54
7
54
2 1
5 .
c. Turn on the controller. Then load the BASIC operating system and the binary
extensions.
1-2 Learning GPIB Remote Control Basics

How large a system
can you congure?
 Amaximum of 15 devices can be connected on one bus system.

The length of cable between one device and another must be
less than or equal to four meters
.The
total length of cable in
one bus system must be less than or equal to two meters times
the number of devices connected on the bus (the GPIB
controller counts as one device). The total length of cable
must not exceed 20 meters
.

Star
,linear
,and combinational cable congurations are
allowed. There must be no loop
.

It is recommended that no more than four piggyback
connectors be stacked together on one device
.Otherwise
,the
resulting structure could exert enough force on the connector
mounting to damage it.
Learning GPIB Remote Control Basics 1-3

GPIB Commands Introduction
All the analyzer's front-panel keys have a corresponding GPIB command. By executing an
GPIB command, you can operate the analyzer as if you were pressing the corresponding key.
F
or example
,
Pressing
4
Preset
5
is the same as executing the GPIB command,
PRES .
Note
Each of the analyzer's functions has two corresponding GPIB commands:
One is unique to analyzer
,and the other corresponds to the SCPI (Standard
Commands for Programmable Instruments) standard. In this guide
, only the
commands that are unique to the analyzer are described.
F
or example
,you can use either
NA (which is unique to the analyzer) or
INST:TYPE NA
(which conforms to SCPI) to select the analyzer type.
F
or details on SCPI, see
GPIB Command Reference
.
T
oExecute an GPIB Command
Combine the BASIC
OUTPUT
statement with the GPIB select code
,the device address
,and
nally the analyzer command. F
or example
,to execute
PRES
command, type:
Using Instrument B
ASIC
And press
4
Return
5
.The analyzer goes to the preset state
.
Using an External Controller
And press
4
Return
5 . The analyzer is set to GPIB remote mode
. Then the analyzer goes
to the preset state
.
What is GPIB remote
mode?
Executing an
OUTPUT statement that is addressed to the
analyzer,sets ittothe GPIB remote mode
. In the remote
mode, all the analyzer's front-panel keys are locked out,
except 4
Lo cal
5 . Pressing
4
Lo cal
5 puts the analyzer back in local
mode. In local mode, all front-panel keys are enabled.
1-4 Learning GPIB Remote Control Basics

To Program a Basic Measurement
This section describes how to organize the commands into a measurement sequence
. Figure 1-2
shows atypical program ow for a measurement.
Figure 1-2. Program Flow
The following program performs the measurement ow controlling the analyzer using GPIB
.
This guide shows program lists of sample programs for an external controller
.T
o
use the sample programs in this guide with Instrument B
ASIC, change the select
code from 7to8and change the GPIB address from 17 to 00 (that is
,use 800
instead of 717).
d a
10 !
20 !Figure 1-3. Basic Measurement
30 !
40 ASSIGN @Hp4396 TO 717 !When iBASIC is used, change "717" to "800".
50 !
60 OUTPUT @Hp4396;"PRES" ! Preset 4396B
70 OUTPUT @Hp4396;"CHAN1;NA;MEAS S21;FMT LOGM"
80 INPUT "Enter center frequency (Hz).",F_cent
90 INPUT "Enter frequency span (Hz).",F_span
100 OUTPUT @Hp4396;"CENT ";F_cent
110 OUTPUT @Hp4396;"SPAN ";F_span
120 !
130 ! Frequency Response Calibration
140 OUTPUT @Hp4396;"CALK N50" ! Select 50 ohm type-N Cal. kit
150 OUTPUT @Hp4396;"CALI RESP" ! Select Response cal.
160 OUTPUT @Hp4396;"CLES" ! Clear all status
170 INPUT "Connect THRU, then press [Return].",Dum$
180 OUTPUT @Hp4396;"*SRE 4;ESNB 1" ! Set enable STB and ESB
190 ON INTR 7 GOTO Cal_end ! \ When iBASIC is used, change "7" to "8".
200 ENABLE INTR 7;2 !/
210 OUTPUT @Hp4396;"STANC" ! Measure THRU
Figure 1-3. Sample Program : Basic Measurement (1/2)
Learning GPIB Remote Control Basics 1-5

c b
220 Calibrating: GOTO Calibrating
230 Cal_end: !
240 OUTPUT @Hp4396;"RESPDONE" !Calculating cal coefficients
250 OUTPUT @Hp4396;"*OPC?" !\ Waiting calculation end
260 ENTER @Hp4396;Dum !/
270 DISP "Response cal completed."
280 !
290 !Measurement
300 INPUT "Connect DUT, then press [Return].",Dum$
310 OUTPUT @Hp4396;"CLES" !Clear all status registers
320 OUTPUT @Hp4396;"*SRE 4;ESNB 1"
330 ON INTR 7 GOTO Sweep_end !\When iBASIC is used,
340 ENABLE INTR 7;2 !/change "7" to "8"
350 OUTPUT @Hp4396;"SING" ! Sweep mode is SINGLE
360 Measuring: GOTO Measuring
370 Sweep_end: !
380 OUTPUT @Hp4396;"MKR ON" !Marker 1ON
390 OUTPUT @Hp4396;"SEAM MAX" !Search MAX
400 OUTPUT @Hp4396;"OUTPMKR?" !Output marker value
410 ENTER @Hp4396;Val1,Val2,Swp
420 PRINT "Max val:",Val1;"dB"
430 PRINT "Swp.Prmtr:",Swp;"Hz"
440 END
Figure 1-3. Sample Program :Basic Measurement (2/2)
Set I/O P
ath
40 ASSIGN @Hp4396 TO 717 !When iBASIC is used, change "717" to "800".
This operation allows you to use
@Hp4396
,instead of
717
(or
800
), as the GPIB address in the
program.
Set Up the Measurement P
arameters
60 OUTPUT @Hp4396;"PRES" !Preset 4396B
70 OUTPUT @Hp4396;"CHAN1;NA;MEAS S21;FMT LOGM"
80 INPUT "Enter center frequency (Hz).",F_cent
90 INPUT "Enter frequency span (Hz).",F_span
100 OUTPUT @Hp4396;"CENT ";F_cent
110 OUTPUT @Hp4396;"SPAN ";F_span
You can execute GPIB commands in the same sequence as key operation. Lines 60
and 70 perform the same operation as pressing
4
Preset
54
Chan 1
54
Meas
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
ANALYZER TYPE
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NETWORK ANALYZER
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
S PARAMETERS
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Trans:FDW S21[B/R]
4
F
ormat
5
NNNNNNNNNNNNNNNNNNNNNNN
LOG MAG
.
In general, the procedure for setting up measurements on the analyzer via GPIB follows the
same sequence as performing the procedure manually
. There is no required order
, as long as
the desired frequency range
, number of points
, and power level are set before performing the
calibration.
In line 70, several GPIB commands, separated by semicolon, are executed in a line. This is the
same as:
70 OUTPUT @Hp4396;"CHAN1"
71 OUTPUT @Hp4396;"NA"
72 OUTPUT @Hp4396;"MEAS S21"
73 OUTPUT @Hp4396;"FMT LOGM"
1-6 Learning GPIB Remote Control Basics

In lines 80 to 110 (setting frequency), parameters are required with the GPIB command. T
oset
parameters
, see \T
oExecute an GPIB Command with aP
arameter" later in this chapter.
P
erform Calibration
130 ! Frequency Response Calibration
140 OUTPUT @Hp4396;"CALK N50" !Select 50 ohm type-N Cal. kit
150 OUTPUT @Hp4396;"CALI RESP" !Select Response cal.
160 OUTPUT @Hp4396;"CLES" !Clear all status
170 INPUT "Connect THRU, then press [Return].",Dum$
180 OUTPUT @Hp4396;"*SRE 4;ESNB 1" !Set enable STB and ESB
190 ON INTR 7GOTO Cal_end !\When iBASIC is used, change "7" to "8".
200 ENABLE INTR 7;2 !/
210 OUTPUT @Hp4396;"STANC" !Measure THRU
220 Calibrating: GOTO Calibrating
230 Cal_end: !
240 OUTPUT @Hp4396;"RESPDONE" !Calculating cal coefficients
250 OUTPUT @Hp4396;"*OPC?" !\Waiting calculation end
260 ENTER @Hp4396;Dum !/
270 DISP "Response cal completed."
In lines 140 to 240, the GPIB program follows the key strokes required to calibrate from the
front panel. This program performs aresponse calibration.
Line 170 requests the operator to connect aTHRU calibration standard.
Lines 180 through 220 use the status bytes to detect the completion of the THRU calibration.
See \T
oW
ait for Sweep End" in Chapter 3.
Lines 240 through 270 use the
*OPC?
command to detect the completion of the calculation
of the calibration coecients
.See \T
oW
ait F
or the Preceding Operation to Complete
"in
Chapter 3.
Connect DUT
300 INPUT "Connect DUT, then press [Return].",Dum$
Line 300 requests the operator to connect a DUT to the analyzer
.
All instrument settings and calibration are done. You can now measure the DUT
.
Trigger a Measurement
310 OUTPUT @Hp4396;"CLES" ! Clear all status registers
320 OUTPUT @Hp4396;"*SRE 4;ESNB 1"
330 ON INTR 7 GOTO Sweep_end ! \ When iBASIC is used,
340 ENABLE INTR 7;2 ! / change "7" to "8"
350 OUTPUT @Hp4396;"SING" !Sweep mode is SINGLE
360 Measuring: GOTO Measuring
370 Sweep_end: !
Lines 310 to 370 enable SRQ interruption for sweep end detection. For details, see Chapter 3.
In line 350, the analyzer executed a single trigger.For more advanced trigger control, see
Chapter 2.
Learning GPIB Remote Control Basics 1-7

P
ost-Processing
380 OUTPUT @Hp4396;"MKR ON" !Marker 1ON
390 OUTPUT @Hp4396;"SEAM MAX" !Search MAX
Line 380 activates the marker and line 390 moves the marker to the maximum value on the
trace
.F
or details on using the marker
,see Chapter 4.
Transfer Data
400 OUTPUT @Hp4396;"OUTPMKR?" !Output marker value
410 ENTER @Hp4396;Val1,Val2,Swp
Line 400 the measured data is transferred to the controller. For details about data transfer
,see
Chapter 4.
T
oExecute an GPIB Command with aP
arameter
Some GPIB commands require a numeric parameter
.F
or example:
OUTPUT @Hp4396;"CENT 25000000" ! Set center frequency to 25 MHz.
(The space between the command and the numeric parameter is mandatory
.)
Y
ou can program it to be entered each time the program is run. F
or example:
100 INPUT "Enter center frequency(Hz).";F_cent
110 OUTPUT @Hp4396;"CENT ";F_cent
Executing this
,
d a
Enter center frequency (Hz).
25000000
The analyzer's center frequency is set to 25 MHz.
T
oExecute aQuery
Any GPIB command that is used with a numeric parameter can also be used as query
command. F
or example
,the
CENT numeric parameter
command used in the previous example
,
can be combined with a
? , and used as a query command as follows
,
10 OUTPUT @Hp4396;"CENT?"
20 ENTER @Hp4396;A
30 PRINT A
The CENT? command returns the current center frequency, which is put into
A . Executing this
program results in the following:
d a
25000000
By interrogating the analyzer to determine the values of the start and stop frequencies,orthe
center frequency and frequency span, the computer can keep track of the actual frequencies.
1-8 Learning GPIB Remote Control Basics