Analogic DBS9900 User manual

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High-Performance VXI Carrier
User’s Manual
Revision 01
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DBS9900 User’s Manual
ii DBS9900 User’s Manual
82-28993 Revision 01
Proprietary Statement
The information contained in this publication is derived in part from proprietary and patent data of the Analogic
Corporation. This information has been prepared for the express purpose of assisting operating and maintenance
personnel in the efficient use of the instrument described herein. Publication of this information does not convey any
rights to reproduce it or to use it for any purpose other than in connection with the installation, operation, and
maintenance of the equipment described herein.
P/N 82-5134
Revision 01
Copyright Analogic Corporation 2000. All rights reserved.
Printed in U.S.A.
DBS9900, DBS901 and DBS902 are trademarks of Analogic Corporation.
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Warranty
Analogic warrants only to the original purchaser that this product, as purchased from Analogic or an Analogic
distributor or dealer, will conform to the written specifications for a period of one year from the date of purchase. If
the product fails to conform to these warranties, Analogic, as its sole and exclusive liability hereunder, will repair or
replace the product and/or its components within a reasonable period of time if the product is returned to a Analogic
service center within the warranty period. These warranties are made upon the express condition that:
a) The purchaser will promptly notify Analogic in writing of any non-conformity with the above warranty
including a detailed explanation of the alleged deficiencies.
b) The product is returned to an Analogic service center at the buyer’s expense after making suitable arrangements
for performance of service.
c) When the product is returned for repair, a copy of the original bill of sale or invoice is sent with the product.
d) Analogic will not be liable for any incidental or consequential damages.
e) In the opinion of Analogic upon inspection, the product has not been misused, altered, or damaged due to
abnormal handling and/or operation.
f) Repairs to the product and/or its components have not been made by anyone other than Analogic or one of its
authorized repair agents.
g) The product has not been modified, altered, or changed in any manner by anyone other than Analogic or one of
its authorized repair agents.
THIS WARRANTY EXCLUDES ALL OTHER WARRANTIES, WHETHER EXPRESSED OR IMPLIED, ORAL
OR WRITTEN, INCLUDING WITHOUT LIMITATION WARRANTIES OF MERCHANTABILITY AND/OR
FITNESS FOR A PARTICULAR PURPOSE.
No term, condition, understanding or agreement purporting to modify the terms of this warranty shall have any legal
effect unless made in writing and signed by an authorized officer of Analogic and the purchaser.
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Definition of Terms
Term Definition
I/0 1, I/0 2 Also called daughterboards, and/or modules. There can be one or two
modules installed in the DBS9900. I/O 1 refers to the first installed
module and I/O 2 refers to the second.
DBS901 Arbitrary Waveform Generator daughterboard (purchased separately).
DBS902 Digitizer daughter board (purchased separately).
Sample Clock Clock which drives the sample rate of each module. An Internal or
External Sample Clock may be used. It is possible (using the driver) for
one module to use an Internal Sample Clock and the other to be using an
External Sample Clock.
Reference Clock Timebase used by the DBS9900 as a reference for both installed
modules (I/O 1 and I/O 2). This PLL 10MHz reference signal is provided
internally by default but an External signal may be used. Can only be
applied to the CLK 2 input on the Front Panel.
About this Manual
This manual is organized in a top-down manner.
This means that the first chapters provide overview and installation information.
Then, configuration and setup information is presented.
Finally, functionality is described. Each of the following sections describe similar content – but from a
high-level perspective (Soft Front Panel) to a low-level perspective (hardware register descriptions).
• DBS9900 Soft Front Panel
• DBS9900 Driver (.DLL) Functions
• DBS9900 Registers
Reference material is presented in Appendices.
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Safety Precautions
Warnings and Cautions
The terms WARNING and CAUTION have specific meanings in this manual:
WARNING
A WARNING advises against certain actions or situations that could result in personal
injury or death.
CAUTION
A CAUTION advises against actions that could damage equipment, produce inaccurate
data or invalidate a procedure.
Mesures de securite
Mises en garde
Les terms AVERTISSEMENT et ATTENTION ont des sens spécifiques dans cette notice.
AVERTISSEMENT
Un AVERTISSEMENT informe des actions ou situations qui peuvent présenter un
risque de blessure ou de décès.
ATTENTION
Une mise en garde débutant par le terme ATTENTION informe des actions que peuvent
endommager le metériel, produire des données incorrectes ou nuire au
fonctionnement.
Sicherheitsvorkehrungen
Warnung und Vorsicht
Die Bezeichnungen WARNUNG und VORSICHT haben in diesen Sicherheitsvorschriften eine besondere
Bedeutung.
WARNUNG
Eine WARNUNG rät gegen bestimmte Handlungen oder Situationen, die Verletzung der
Person oder Tod zur Folge haben können.
VORSICHT
VORSICHT weist auf Handlungen hin, die das Gerät beschädigen könnten, unrichtige
Daten verursachen oder einen Vorgang auslöschen können.
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SAFETY SUMMARY
The following safety precautions apply to both operating and maintenance personnel and must be
observed during all phases of installation, operation, and service of the unit. Before applying
power, follow the installation instructions and become familiar with the operating instructions
for all components.
CAUTION
This product uses components which can be damaged by electrostatic
discharge (ESD). To avoid damage, be sure to follow proper procedures
for handling, storing, and transporting ESD-sensitive devices.
PRÉCAUTIONS
Ce produit utilise des composants pouvant être endommagés par décharge
électrostatique (DES). Pour éviter les dégâts, suivre les procédures
appropriées lors de la manipulation, du stockage, et du transport des
dispositifs sensibles aux décharges électrostatiques.
VORSICHT
Dieses Produkt ist mit Komponenten ausgerüstet, die durch elektrostatische
Entladung beschädigt werden können. Zur Vermeidung von Schäden muß
dafür gesorgt werden, daß die maßgeblichen Vorschriften für die Behandlung,
Lagerung und den Transport für elektrostatisch empfindliche Geräte beachtet
werden.
WARNING
Do not operate the unit in the presence of flammable gases or fumes.
Operation of the unit in any such environment constitutes a definite
safety hazard.
AVERTISSEMENT
Ne pas faire fonctionner l’unité en présence de gaz ou de vapeurs
inflammables. Le fonctionnement de l’unité dans un environnement de ce
type constitue un danger évident pour la sécurité.
WARNUNG
Die Einheit darf nicht in Gegenwart von feuergefährlichen Gasen oder
Dämpfen betrieben werden. Der Betrieb der Einheit in einer derartigen
Umgebung stellt eine eindeutige Gefahrenquelle dar.
WARNING
Do not install substitute parts or perform any unauthorized
modifications to this unit. Return the unit to Analogic for service and
repair to ensure that the safety features are maintained.
AVERTISSEMENT - NE PAS SUBSTITUER LES PIÈCES OU MODIFIER
L’UNITÉ
Ne pas installer de pièces de substitution ni effectuer des modifications non
autorisées sur l’unité. Renvoyer l’unité à Analogic pour l’entretien et les
réparations, de manière à assurer que les dispositifs de sécurité soient
maintenus.
WARNUNG - NUR ORIGINALTEILE BENÜTZEN UND DIE EINHEIT NICHT
ÄNDERN
Es sind nur Originalteile einzubauen, und ohne Erlaubnis darf keine Änderung
an der Einheit vorgenommen werden. Zur Wartung und Reparatur ist die
Einheit an Analogic zurückzusenden, damit die Beibehaltung der
Sicherheitseigenschaften gewährleistet ist.
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Contents
1Overview.......................................................................................................................... 1-1
1.1 Introduction.......................................................................................................................................................... 1-1
1.2 Technical Support ................................................................................................................................................ 1-2
2Preparation & Installation .............................................................................................. 2-1
2.1 Overview.............................................................................................................................................................. 2-1
2.2 Host Computer Requirements .............................................................................................................................. 2-1
2.3 Power Consumption and Airflow Requirements.................................................................................................. 2-1
2.4 Front Panel Connectors and Indicators ................................................................................................................ 2-2
2.5 Hardware Installation ........................................................................................................................................... 2-4
2.5.1 Installation into a VXI Chassis 2-4
2.5.2 The DBS9900 Logical Address 2-4
2.5.3 A16, A24 and A32 Communications Mode 2-5
2.6 Software Installation ............................................................................................................................................ 2-6
2.6.1 InstallationSteps 2-6
2.7 Start-Up and Verification..................................................................................................................................... 2-6
2.7.1 Self-Test 2-6
2.8 DBS9900/Module Pin Connections ..................................................................................................................... 2-7
2.9 DBS9900 26 Pin Control Connector.................................................................................................................... 2-8
3Operation......................................................................................................................... 3-1
3.1 Sample Clock and Timebase ................................................................................................................................ 3-2
3.1.1 Possible Clock Configurations 3-2
3.1.2 Internal Sample Clock Parameters 3-3
3.1.3 External Sample Clock Parameters 3-3
3.1.4 External Reference Parameters 3-3
3.2 Performance Specification ................................................................................................................................... 3-4
3.2.1 ANALOG I/O 3-4
3.2.2 INTERNAL SAMPLE CLOCK 3-4
3.2.3CONTROLINPUTS 3-4
3.2.4 CONTROL OUTPUTS 3-5
3.2.5POWER 3-6
3.2.6RELIABILITY 3-6
3.2.7 RECOMMENDED WARM-UP TIME 3-6
3.2.8 ENVIRONMENTAL AND MECHANICAL 3-6
3.2.9 VME/VXI BUS COMPLIANCE 3-6
3.2.10 SOFTWARE DRIVER 3-6
3.2.11 EMC & SAFETY AGENCY COMPLIANCE 3-7
3.2.12CALIBRATION 3-7
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4Using the DBS9900 Soft Front Panel............................................................................ 4-1
4.1 DBS9900 Main Panel........................................................................................................................................... 4-1
4.1.1 Main Panel Field Descriptions 4-2
Error! Bookmark not defined.
4.2 DBS9900 Sample Clock Panel............................................................................................................................. 4-3
4.2.1 Sample Clock Field Descriptions 4-5
4.3 DBS9900 Trigger Panel ....................................................................................................................................... 4-6
4.3.1 Trigger Panel Field Descriptions 4-7
5DBS9900 Driver Software – Description of Functions ................................................ 5-1
5.1 Initialize, Module and Close Functions................................................................................................................ 5-1
5.1.1 Initialize an9900_init 5-1
5.1.2 VIT Initialize an9900_VITinit 5-2
5.1.3 Set Module an9900_setModule 5-4
5.1.4 Get Module an9900_getModule 5-4
5.1.5 Identify Module an9900_identifyModule 5-5
5.1.6 Close an9900_close 5-6
5.2 Control ................................................................................................................................................................. 5-7
5.2.1 Device Type Query an9900_deviceType_Q 5-8
5.2.2 Control an9900_control 5-9
5.2.3 Status Query an9900_status_Q 5-10
5.2.4 Interrupt an9900_interrupt 5-11
5.2.5 Interrupt Query an9900_interrupt_Q 5-12
5.3 Module ............................................................................................................................................................... 5-13
5.3.1 Module Status Query an9900_moduleStatus_Q 5-14
5.3.2 Module Control an9900_moduleControl 5-15
5.3.3 Module Control Query an9900_moduleControl_Q5-16
5.3.4 EEPROM Port Write an9900_eepromPortWrite 5-17
5.3.5 EEPROM Port Query an9900_eepromPort_Q 5-18
5.3.6 EEPROM Write Enable an9900_eepromWriteEnable5-19
5.4 Memory.............................................................................................................................................................. 5-20
5.4.1 Memory Offset an9900_memoryOffset 5-20
5.4.2 Memory Offset Query an9900_memoryOffset_Q 5-21
5.4.3 Memory Attribute Query an9900_memoryAttribute_Q5-22
5.4.4 Enable Memory an9900_enableMemory 5-23
5.5 Trigger................................................................................................................................................................ 5-24
5.5.1 Set Trigger Source an9900_setTrigSource 5-24
5.5.2 Get Trigger Source an9900_getTrigSource 5-25
5.5.3 Set Trigger Output an9900_setTrigOut 5-26
5.5.4 Get Trigger Output an9900_getTrigOut 5-27
5.5.5 Set Trigger Polarity an9900_setTrigPolarity 5-28
5.5.6 Get Trigger Polarity an9900_getTrigPolarity 5-29
5.5.7 Set Trigger Threshold an9900_setTrigThreshold 5-30
5.5.8 Get Trigger Threshold an9900_getTrigThreshold 5-31
5.5.9 Trigger Source Control an9900_triggerSourceControl 5-32
5.5.10 Trigger Source Control Query an9900_triggerSourceControl_Q5-33
5.5.11 Trigger Mode an9900_triggerMode 5-34
5.5.12 Trigger Mode Query an9900_triggerMode_Q 5-35
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5.6 Clock .................................................................................................................................................................. 5-36
5.6.1 Set Clock Source an9900_setClockSource 5-37
5.6.2 Get Clock Source an9900_getClockSource 5-38
5.6.3 Set Internal Clock Reference an9900_setIntClockRef 5-39
5.6.4 Get Internal Clock Reference an9900_getIntClockRef 5-40
5.6.5 Set Clock Threshold an9900_setClockThreshold 5-41
5.6.6 Get Clock Threshold an9900_getClockThreshold 5-42
5.6.7 Set Sample Rate an9900_setSampleRate 5-43
5.6.8 Get Sample Rate an9900_getSampleRate 5-43
5.6.9 Await PLL Lock an9900_awaitPLLLock 5-44
5.6.10 Clock Frequency an9900_clockFreq 5-45
5.6.11 Clock Frequency Query an9900_clockFreq_Q 5-46
5.6.12 Clock Control an9900_clockControl 5-47
5.6.13 Clock Control Query an9900_clockControl_Q 5-48
5.6.14 R Counter an9900_rCounter 5-49
5.6.15 R Counter Query an9900_rCounter_Q 5-49
5.6.16 N Counter an9900_NCounter 5-50
5.6.17 High Speed Divider an9900_highSpeedDivider5-51
5.6.18 Low Speed Divider an9900_lowSpeedDivider 5-51
5.6.19 Clock A/B Threshold an9900_clockThreshold 5-52
5.6.20 Clock A/B Threshold Query an9900_clockThreshold_Q 5-53
5.6.21 Trigger A/B Threshold an9900_triggerThreshold 5-54
5.6.22 Trigger A/B Threshold Query an9900_triggerThreshold_Q 5-55
5.6.23 Function Latch an9900_functionLatch 5-56
5.6.24 Time Base Control an9900_timeBaseControl 5-57
5.7 Utility ................................................................................................................................................................. 5-58
5.7.1 Get Error Text an9900_getErrorText 5-58
5.7.2 Mask Write to Instrument an9900_maskWriteInst 5-59
5.7.3 Write to Instrument an9900_writeInst 5-60
5.7.4 Read from Instrument an9900_readInst 5-61
5.7.5 Reset an9900_reset 5-62
5.7.6 Error Message an9900_errorMessage 5-63
DBS9900 VME / VXI Bus Interface - Registers ................................................................... 6-1
6.1 ID REGISTER 0x00 Read Only Logical Address Register ................................................................................. 6-3
6.2 DEVICE TYPE REGISTER ................................................................................................................................ 6-3
6.3 Control Register ................................................................................................................................................... 6-5
6.4 Status Register...................................................................................................................................................... 6-5
6.5 Memory Offset Register....................................................................................................................................... 6-6
6.6 Memory Attribute Register .................................................................................................................................. 6-7
6.7 Module / Relay Control Register ......................................................................................................................... 6-7
6.8 Trigger Source Control Register .......................................................................................................................... 6-8
6.9 Trigger Mode Control Register ............................................................................................................................ 6-9
6.10 Interrupt Level Select Register........................................................................................................................... 6-10
6.11 Interrupt Vector Select Register......................................................................................................................... 6-10
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6.12 JTAG Programming Register............................................................................................................................. 6-11
7Clock................................................................................................................................ 7-1
7.1 Channel A/B Clock Selection: ............................................................................................................................. 7-1
7.2 Frequency Synthesizer: ........................................................................................................................................ 7-1
7.3 Time Base Divider: .............................................................................................................................................. 7-1
7.4 Program Sequence:............................................................................................................................................... 7-1
7.4.1 Sample Rate Calculation: 7-2
7.5 Phase Lock Loop.................................................................................................................................................. 7-3
7.6 LMX2306 Communications port ......................................................................................................................... 7-3
7.6.1 TIMEBASERESET 7-4
7.6.2 PLL R-COUNTER 7-4
7.6.3 PLL N-COUNTER 7-6
7.6.4 PLLFUNCTIONLATCH 7-8
7.7 Clock Control Register....................................................................................................................................... 7-11
7.7.1 Clock Control Description 7-12
7.8 LSDIV Low Speed Divider Register.................................................................................................................. 7-12
7.9 Time Base Control Register ............................................................................................................................... 7-15
7.9.1 TIMEBASECLOCKInputs 7-16
7.9.2 D[07:05] MISCELANEOUS Control bits 7-16
7.10 High Speed Divider Data Register ..................................................................................................................... 7-17
7.11 Clock A Threshold Register............................................................................................................................... 7-18
7.12 Clock B Threshold Register ............................................................................................................................... 7-19
7.13 Trigger A Threshold Register ............................................................................................................................ 7-20
7.14 Trigger B Threshold Register............................................................................................................................. 7-21
8Programming Examples: ............................................................................................... 8-1
8.1 Clock Programming Example: ............................................................................................................................. 8-1
9Time Base Truth Table:.................................................................................................. 9-1
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DBS9900 User’s Manual
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1 Overview
1.1 Introduction
The Analogic DBS9900 is a high-speed, VXI ‘C’ size module. The DBS9900 accepts one or two
daughterboards (called modules) from the DBS 9xx family of high-speed, high precision
waveform generators and digitizers. Each module contains the circuitry necessary to operate
independently for a complete channel of analog input or output. This motherboard/daughterboard
concept allows a single VXI chassis slot to provide multiple functions thereby maximizing VXI
resources and decreasing the cost per slot.
The DBS9900 contains the basic register set for a register-based VXI device and also the CLASS
Dependent Register set (used for functions common to all modules resident on the DBS9900). It
also contains all circuitry and connectors required for supporting functions associated with the
plug-in modules. That the entire VXI interface is implemented in a single device provides
increased reliability and lower cost.
Versatile clocking and triggering is provided via internal circuitry, front panel connectors, and VXI
TTLTRG or ECLTRG lines. The internal clock may be used to drive all plug-in function modules
simultaneously so that clock skew and delays are reduced to an absolute minimum. This allows
coherent operation of multiple plug-in modules, such as an Arbitrary Waveform Generator and a
Digitizer. Programmable trigger and clock thresholds are provided for each module.
Software drivers support all instrument functionality via a soft front panel and are compliant with
current VXI Plug and Play specifications. These drivers operate under Windows 9x and Windows
NT. The User makes a selection of operating system desired as part of software installation and
setup. The driver, upon initialization, interrogates the DBS9900 and identifies installed modules.
Appropriate .DLLs are associated with each type of module.
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1.2 Technical Support
If you need technical assistance, or if the unit fails to operate as expected upon arrival, please
contact Analogic’s Measurement and Control Division (MCD) Applications Engineering
department:
Telephone: [phone] Domestic Calls: Ext. 3859 or 3881
You will be connected with an T&M Applications Engineer who will work with you to solve your
problem. If the unit needs to be returned to the factory, this engineer will refer you to our
Customer Service Office.
If referred to Customer Service
Please provide the Customer Service Office with the following information:
• Model Number
• Serial Number
• Purchase Order number
• Quantity being returned
• Detailed description of the malfunction or reported failure
• Your “Bill To” and “Ship To” addresses
• Method of return shipment, with account number
Our Customer Service Coordinator will provide you a Customer Service Order number (CSO) that
is an internal Analogic tracking number. The Service Coordinator will also inform you of the
Warranty or Non-Warranty status of the units being returned, and the repair charge, if any.
The CSO number is your return authorization number. Please write this number on your
Purchase Order and Shipping Label.
Send all authorized returns to:
Analogic Corporation
8 Centennial Drive
Peabody, MA 01960
Attn: Receiving Dock B
CSO# ________________
After the material has been returned, you will receive an acknowledgment copy of the CSO that
will be marked with the scheduled return date.
Analogic Customer Service Division offers the following means of communication:
Telephone Toll-free (Outside MA) 800-237-2200
Telephone (Inside MA) 978-977-3000
Spare Parts Only Ext. 3614
Repairs Only Ext. 3612, 3616, 3617
Facsimile 978-532-8913
Internet E-Mail Address [e-mail]
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Your cooperation in contacting Analogic, Customer Service, and including the CSO Number with
your return, as requested above, will allow us to properly track your returned goods and expedite
repair and return.
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DBS9900 User’s Manual
DBS9900 Preparation & Installation 2-1
82-28993 Revision 01
2 Preparation & Installation
2.1 Overview
This section provides instructions for setting up the unit and installing the necessary hardware
and software. After unpacking, carefully inspect the hardware for any damage that may have
occurred during shipment. If necessary, contact your shipping carrier to file a claim. Save the
shipping carton and packing materials if for any reason you need to return the product for repair
or replacement.
CAUTION
This product contains components which are sensitive to electrostatic discharge (ESD).
Be sure to follow proper procedures for handling, storing and transporting ESD-sensitive
assemblies.
2.2 Host Computer Requirements
Minimum system requirements for running the driver and soft front panel applications:
• Pentium processor
• 32 MB RAM
• Win 9x/Win NT 4.0, Service Pack 3
• 20 MB free hard drive space
2.3 Power Consumption and Airflow Requirements
Power Consumption: Airflow Requirements
Idle. 4 liters/minute
Volts Amps Watts
24 0.00 0.0
-24 0.00 0.0
12 0.01 0.1
-12 0.04 0.4
5 0.70 3.5
-5.2 0.98 5.1
-2 0.64 1.3
Supply Power Draw = 10.4 Watts
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2.4 Front Panel Connectors and Indicators
The DBS9900 Front Panel is shown below.
I/O 1, I/O 2, CAL, CLK and TRIG are SMA connectors. An additional 26 pin, 3-row D connector is
provided for module specific I/O. There are three LED indicators on the front panel. They are
POWER, CH 1 ACTIVE, and CH 2 ACTIVE. The power LED is yellow during self-test. If DC
power is OK at the end of the self-test, it will turn green. The CH1 and CH2 LEDs are dark if no
module is installed, green when the module is active, and amber when idle.
C
O
N
T
R
O
L
POWER
I/0 1
+
I/0 1
-
TRIG
1
CLK
1
CAL
+
CAL
-
I/0 2
+
I/O 2
-
TRIG
2
CLK
2
CH 1 ACTIVE
CH 2 ACTIVE
Figure 2-1 DBS9900 Front Panel
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Front Panel Connectors and Indicators, continued
Pin Description Pin Description Pin Description
1 I/O_1_B
Reserved
10 I/O_3_B
Reserved
19 902 DATA_TAG_B I/O_2
2 I/O_2_B
Reserved
11 I/O_4_B
Reserved
20 902 DATA_TAG_A I/O_2
3 901 SYNC I/O_2 12 I/O_5_B
Reserved
21 GND
4 901 MARKER I/O_2 13 GND 22 901 ADVANCE I/O_2
5 901 SYNC I/O_1 14 GND 23 901 ADVANCE I/O_1
6 901 MARKER I/O_1 15 GND 24 GND
7 I/O_3_A
Reserved
16 GND 25 902 DATA_TAG_A I/O_1
8 I/O_2_A
Reserved
17 I/O_5_A
Reserved
26 902 DATA_TAG_A I/O_1
9 I/O_1_A
Reserved
18 I/O_4_A
Reserved
Note: All outputs are 50 ohm impedance. All
inputs are high impedance.
Figure 2-2 Front Panel 26 Pin Connector
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DBS9900 User’s Manual
2-4 DBS9900 Preparation & Installation
82-28993 Revision 01
2.5 Hardware Installation
2.5.1 Installation into a VXI Chassis
When selecting the appropriate VXI chassis, ensure that it meets the cooling and power
requirements specified below. This instrument can be installed in any VXI chassis slot except Slot
0.
One empty slot is required.
The DBS9900 should be FIRMLY inserted into the slot to ensure proper operation.
2.5.2 The DBS9900 Logical Address
Registers in VXIbus devices are located in the A16 address space (within 64 byte blocks). To
determine the unit’s base address, the device’s Logical Address must be known. The Logical
Address is an 8-bit value, which maps to a unique A16 address. The Logical Address selector is
an eight bit dip switch located as shown in the figure below.
The Logical Address value indicated by this selector corresponds to bits 6-13 of the device
register base address. Bits 14 and 15 of the base address are both 1, and the base address is:
Logical Address * 64 + 49152
The DSB9900 is shipped with the base address set to 0xE000 (which maps to Logical Address
128).
To change the shipped DBS9900 Logical Address
Using a needle probe or similar instrument, each of the eight dip switches may be set to the
desired logical address. Simply insert the needle probe through one of the holes in the case and
push the dip switch to the desired setting.
For A16 Base Address 0xC000 – 0xFF80, set switch to the “ON” position for logic 1. Do not set to
0xFFC0. This represents Logical Address 255d, which is used for DC devices and should not be
set for the DBS9900.
In the figure below, S1 is shown in the shipped position.
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DBS9900 User’s Manual
DBS9900 Preparation & Installation 2-5
82-28993 Revision 01
2.5.3 A16, A24 and A32 Communications Mode
The DBS9900 contains jumpers that can be set for A24 or A32 Communications Mode. These
jumpers are configured at the factory for A24 mode. To operate in A16 mode, do not set any
jumpers.
In order to change this setting the DBS9900 boards must be removed from their case to access
the jumpers. Proceed with caution.
Use the figure below to determine jumper location when setting the jumpers for A24 or A32
Communications Mode.
Note: A24 is only recommended when using a GPIB-VXI-C VXI controller.
P2 P1
12345678
A13 A12 A11 A10 A9 A8 A7 A6
S1
Note: S1 is shown enlarged
for presentation purposes.
DBS9900 Rear
ON
The switches must be set through
these holes on the case using a
needle probe (or a similar tool).
The dip switch is shown below.
1
2
3
A24/A32 Jumper Settings
321
321
A24 (short pin 2 to 3)
A32 (short pin 1 to 2)
Logical Address Dip Switch
Figure 2-3 Jumper Settings for A24 and A32 Communications Mode
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