General Procedure ........................................................................................... 164
Zero Adjustment....................................................................................................... 165
E1563A Gain Adjustment ......................................................................................... 166
E1564A Gain Adjustment ......................................................................................... 167
Index ............................................................................................................................. 169
8
AGILENT TECHNOLOGIES WARRANTY STATEMENT
AGILENT PRODUCT: E1563A 2-Channel Digitizer and E1564A 4-Channel Digitizer DURATION OF WARRANTY: 3 years
1. Agilent Technologies warrants Agilent hardware, accessories and supplies against defects in materials and workmanship for the period
specified above. If Agilent receives notice of such defects during the warranty period, Agilent will, at its option, either repair or replace
products which prove to be defective. Replacement products may be either new or like-new.
2. Agilent warrants that Agilent software will not fail to execute its programming instructions, for the period specified above, due to
defects in material and workmanship when properly installed and used. If Agilent receives notice of such defects during the warranty
period, Agilent will replace software media which does not execute its programming instructions due to such defects.
3. Agilent does not warrant that the operation of Agilent products will be uninterrupted or error free. If Agilent is unable, within a
reasonable time, to repair or replace any product to a condition as warranted, customer will be entitled to a refund of the purchase price
upon prompt return of the product.
4. Agilent products may contain remanufactured parts equivalent to new in performance or may have been subject to incidental use.
5. The warranty period begins on the date of delivery or on the date of installation if installed by Agilent. If customer schedules or delays
Agilent installation more than 30 days after delivery, warranty begins on the 31st day from delivery.
6. Warranty does not apply to defects resulting from (a) improper or inadequate maintenance or calibration, (b) software, interfacing, parts
or supplies not supplied by Agilent, (c) unauthorized modification or misuse, (d) operation outside of the published environmental
specifications for the product, or (e) improper site preparation or maintenance.
7. TO THE EXTENT ALLOWED BY LOCAL LAW, THE ABOVE WARRANTIES ARE EXCLUSIVE AND NO OTHER
WARRANTY OR CONDITION, WHETHER WRITTEN OR ORAL, IS EXPRESSED OR IMPLIED AND AGILENT
SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OR CONDITIONS OF MERCHANTABILITY, SATISFACTORY
QUALITY, AND FITNESS FOR A PARTICULAR PURPOSE.
8. Agilent will be liable for damage to tangible property per incident up to the greater of $300,000 or the actual amount paid for the product
that is the subject of the claim, and for damages for bodily injury or death, to the extent that all such damages are determined by a court
of competent jurisdiction to have been directly caused by a defective Agilent product.
9. TO THE EXTENT ALLOWED BY LOCAL LAW, THE REMEDIES IN THIS WARRANTY STATEMENT ARE CUSTOMER’S
SOLE AND EXLUSIVE REMEDIES. EXCEPT AS INDICATED ABOVE, IN NO EVENT WILL AGILENT OR ITS SUPPLIERS BE
LIABLE FOR LOSS OF DATA OR FOR DIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL (INCLUDING LOST PROFIT OR
DATA), OR OTHER DAMAGE, WHETHER BASED IN CONTRACT, TORT, OR OTHERWISE.
FOR CONSUMER TRANSACTIONS IN AUSTRALIA AND NEW ZEALAND: THE WARRANTY TERMS CONTAINED IN THIS
STATEMENT, EXCEPT TO THE EXTENT LAWFULLY PERMITTED, DO NOT EXCLUDE, RESTRICT OR MODIFY AND ARE
IN ADDITION TO THE MANDATORY STATUTORY RIGHTS APPLICABLE TO THE SALE OF THIS PRODUCT TO YOU.
U.S. Government Restricted Rights
The Software and Documentation have been developed entirely at private expense. They are delivered and licensed as "commercial
computer software" as defined in DFARS 252.227- 7013 (Oct 1988), DFARS 252.211-7015 (May 1991) or DFARS 252.227-7014 (Jun
1995), as a "commercial item" as defined in FAR 2.101(a), or as "Restricted computer software" as defined in FAR 52.227-19 (Jun
1987)(or any equivalent agency regulation or contract clause), whichever is applicable. You have only those rights provided for such
Software and Documentation by the applicable FAR or DFARS clause or the Agilent standard software agreement for the product
involved.
E1563A 2-Channel Digitizer and E1564A 4-Channel Digitizer User’s Manual
All Editions and Updates of this manual and their creation date are listed below. The first Edition of the manual is Edition 1. The Edition
number increments by 1 whenever the manual is revised. Updates, which are issued between Editions, contain replacement pages to
correct or add additional information to the current Edition of the manual. Whenever a new Edition is created, it will contain all of the
Update information for the previous Edition. Each new Edition or Update also includes a revised copy of this documentation history page.
Instruction manual symbol affixed to
product. Indicates that the user must refer to
product. Indicates that the user must refer to
the manual for specific WARNING or
the manual for specific WARNING or
CAUTION information to avoid personal
CAUTION information to avoid personal
injury or damage to the product.
injury or damage to the product.
Indicates the field wiring terminal that must
be connected to earth ground before
operating the equipment — protects against
electrical shock in case of fault.
WARNING
Alternating current (AC)
Direct current (DC).
Warning. Risk of electrical shock.
Calls attention to a procedure, practice, or
condition that could cause bodily injury or
death.
or
Frame or chassis ground terminal—typically
connects to the equipment's metal frame.
CAUTION
Calls attention to a procedure, practice, or
condition that could possibly cause damage to
equipment or permanent loss of data.
WARNINGS
The following general safety precautions must be observed during all phases of operation, service, and repair of this product. Failure to
comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design, manufacture, and
intended use of the product. Agilent Technologies assumes no liability for the customer's failure to comply with these requirements.
Ground the equipment: For Safety Class 1 equipment (equipment having a protective earth terminal), an uninterruptible safety earth
ground must be provided from the mains power source to the product input wiring terminals or supplied power cable.
DO NOT operate the product in an explosive atmosphere or in the presence of flammable gases or fumes.
For continued protection against fire, replace the line fuse(s) only with fuse(s) of the same voltage and current rating and type. DO NOT
use repaired fuses or short-circuited fuse holders.
Keep away from live circuits: Operating personnel must not remove equipment covers or shields. Procedures involving the removal of
covers or shields are for use by service-trained personnel only. Under certain conditions, dangerous voltages may exist even with the
equipment switched off. To avoid dangerous electrical shock, DO NOT perform procedures involving cover or shield removal unless you
are qualified to do so.
DO NOT operate damaged equipment: Whenever it is possible that the safety protection features built into this product have been
impaired, either through physical damage, excessive moisture, or any other reason, REMOVE POWER and do not use the product until
safe operation can be verified by service-trained personnel. If necessary, return the product to Agilent for service and repair to ensure that
safety features are maintained.
DO NOT service or adjust alone: Do not attempt internal service or adjustment unless another person, capable of rendering first aid and
resuscitation, is present.
DO NOT substitute parts or modify equipment: Because of the danger of introducing additional hazards, do not install substitute parts
or perform any unauthorized modification to the product. Return the product to Agilent for service and repair to ensure that safety features
are maintained.
10
DECLARATION OF CONFORMITYAccording to ISO/IEC Guide 22 and CEN/CENELEC EN 45014
Product Name:2-Channel and 4-Channel Digitizers
Model Number:E1563A/E1564A
Product Options:This declaration covers all options of the above product(s).
Conforms with the following European Directives:
The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC and the EMC Directive 89/336/EEC
(including 93/68/EEC) and carries the CE Marking accordingly
Conforms with the following product standards:
EMCStandard
IEC 61326-1:1997+A1:1998 / EN 61326-1:1997+A1:1998
CISPR 11:1990 / EN 55011:1991
IEC 61000-4-2:1995+A1:1998 / EN 61000-4-2:1995
IEC 61000-4-3:1995 / EN 61000-4-3:1995
IEC 61000-4-4:1995 / EN 61000-4-4:1995
IEC 61000-4-5:1995 / EN 61000-4-5:1995
IEC 61000-4-6:1996 / EN 61000-4-6:1996
IEC 61000-4-11:1994 / EN 61000-4-11:1994
CISPR 22:1997 / EN 55022:1998
CISPR 24
The E1563A (2-channel) and E1564A (4-channel) Digitizers are 800
kSample/second (14-bit resolution) digitizers capable of handling both
continuous and transient voltages up to 256V. You cannot upgrade an
E1563A 2-Channel Digitizer to an E1564A 4-Channel Digitizer.
Chapter 1
General InformationBoth the E1563A and E1564A digitizers are register-based instruments that
can be programmed at the register level (see Appendix C) or at a higher
level using SCPI or VXIplug&play drivers.
The digitizers are ideal for measurements in electomechanical design
characterization, particularily in environments with high levels of electrical
noise and for characterizing electronic and mechanical transient waveforms.
The E1563A 2-Channel Digitizer has a fixed 25 kHz input filter per channel
that can be enabled. The E1564A 4-Channel Digitizer has four selectable
input filters per channel (1.5 kHz, 6 kHz, 25 kHz and 100 kHz) that can be
enabled.
The E1564A 4-Channel Digitizer has a calibration bus output (High, Low and
Guard) and a programmable short. The E1563A 2-Channel Digitizer does
not have a calibration bus output. However, a programmable short is
provided for each channel. An external calibration source must be provided
for calibration.
Both digitizers use PC SIMM memory. Memory sizes that are supported are
4, 8, 16, 32, 64 and 128 Mbytes. The large memory can easily capture
transients or act as FIFO to allow continuous digitizing while unloading data
with block mode transfers.
Configuring the Digitizer Modules 13Chapter 1
All channels sample simultaneously. The sample can be from an internal
clock derived from the internal time base or it can come from an external
source. Triggering can be set up for several sources with programmable pre
and post trigger reading counts. External time base, trigger and sample
inputs are provided on the front panel “D” subminiature connector.
Continuous voltages in a test setup where the user has access to module
connectors and test signal cable ends are restricted to 60 Vdc, 30 Vac rms,
or 42.4 Vac peak of a continuous, complex waveform. Continuous voltages
in test setups where the module connectors and the test signal cables
connected to them are made non-accessible are 256 Vdc, 240 Vdc floating,
or 256 Vac peak.
Transient voltages are permitted providing the maximum amount of charge
transferred into a human body that contacts the voltage under normal
conditions, does not exceed 45
(opens channel input relay) follow.
RangeVoltage Input ConditionVmax
62 mV to 4VHigh or Low to Guard>20V
16V to 256VLow to Guard>40V
mCoulombs (45 mA-s). Overload voltages
Front Panel
Features
Figure 1-1 shows the front panel features for the E1563A 2-Channel
Digitizer. Figure 1-2 shows the front panel features for the E1564A
4-Channel Digitizer.
14 Configuring the Digitizer Modules Chapter 1
Front Panel Indicators
Failed LED: Illuminates momentarily during digitizer power-on.
Access LED: Illuminates when the backplane is communicating with the
digitizer.
Error LED: Illuminates only when an error is present in the digitizer’s driver
error queue. The error can result from improperly executing a command
or the digitizer being unable to pass self-test or calibration.
Sample LED: Illuminates while the digitizer samples the input for a
measurement. Typically blinks for slow sample rates and is on
steady-state for high sample rates.
User Input Terminals
The E1563A Digitizer front panel contains two female connectors for user
inputs. Mating male connectors are supplied with the module. However,
the user must provide the input cable and connect the male connector to
the cable. See "User Cabling Considerations" for recommended
user-supplied cables.
plug&play
External Trigger Input
The front panel contains a 9-pin D-subminiature connector for external
(TTL) trigger inputs. The user must provide an appropriate input cable to the external trigger input. The E1563A 2-Channel Digitizer does not have
a calibration bus output. However, a programmable short is provided for
each channel. An external calibration source must be provided for
calibration.
Figure 1-1. E1563A 2-Channel Digitizer Front Panel
Configuring the Digitizer Modules 15Chapter 1
Front Panel Indicators
Failed LED
Access LED: Illuminates when the backplane is communicating with the
: Illuminates momentarily during digitizer power-on.
digitizer.
Error LED: Illuminates only when an error is present in the digitizer’s driver
error queue. The error can result from improperly executing a command
or the digitizer being unable to pass self-test or calibration.
Sample LED: Illuminates while the digitizer samples the input for a
measurement. Typically blinks for slow sample rates and is on
steady-state for high sample rates.
User Input Terminals
The E1564A Digitizer front panel contains four female connectors for user
inputs. Mating male connectors are supplied with the module. However,
the user must provide the input cable and connect the male connector to
the cable. See "User Cabling Considerations" for connecting
user-supplied cables.
plug&play
External Trigger Input/Calibration Bus Output
The front panel contains a 9-pin D-subminiature connector for external
(TTL) trigger inputs and for calibration bus outputs. The E1564A
4-Channel Digitizer has a calibration bus output (High, Low and Guard)
and a programmable short. The user must provide the the appropriate
cable to the external trigger input/calibration bus output.
Figure 1-2. E1564A 2-Channel Digitizer Front Panel
16 Configuring the Digitizer Modules Chapter 1
Warnings and Cautions
WARNINGDANGEROUS VOLTAGES. The E1563A and E1564A Digitizers are
capable of measuring voltages up to 256V maximum. Voltage levels
above the levels specified for accessible connectors or cable ends
could cause bodily injury or death to an operator. Special precautions
must be adhered to (discussed below) when applying voltages in
excess of 60 Vdc, 30 Vac rms or 42.4 Vac peak for a continuous,
complex waveform.
WARNINGMODULE CONNECTORS MUST NOT BE OPERATOR-ACCESSABLE.
Module connectors and test signal cables connected to them must be
made NON-accessible to an operator who has not been told to access
them. It is a supervisor’s responsibility to advise an operator that
dangerous voltages exist when the operator is instructed to access
connectors and cables carrying these voltages.
Making cables and connectors that carry hazardous voltages
inaccessible is a protective measure keeping an operator from
inadvertent or unknowing contact with these harmful voltages.
Cables and connectors are considered inaccessible if a tool
(e.g., screwdriver, wrench, socket, etc.) or a key (equipment in a
locked cabinet) is required to gain access to them. Additionally,
the operator cannot have access to a conductive surface connected
to any cable conductor (High, Low or Guard).
WARNINGADEQUATE INSULATION IS REQUIRED.Assure the equipment under
test has adequate insulation between the cable connections and any
operator-accessible parts (doors, covers, panels, shields, cases,
cabinets, etc.).
Verify there are multiple and sufficient protective means (rated for the
voltages you are applying) to assure the operator will NOT come into
contact with any energized conductor even if one of the protective
means fails to work as intended.
For example, the inner side of a case, cabinet, door, cover or panel
can be covered with an insulating material as well as routing the
test cables to the module’s front panel connectors through
non-conductive, flexible conduit such as that used in electrical
power distribution.
WARNINGTIGHTEN MOUNTING SCREWS.Tighten the faceplate mounting
screws after installing the module in the mainframe to prevent
electric shock in case of equipment or field wiring failure.
Configuring the Digitizer Modules 17Chapter 1
CAUTION OVERVOLTAGE PROTECTION. To prevent equipment damage,
do not connect this equipment to mains or to any signal directly
derived from mains. Short-term temporary overvoltages must be
limited to 500V or less.
To prevent equipment damage in case of an overvoltage condition,
do not connect this equipment to any voltage source which can
deliver greater than 2A at 500V in the case of a fault. If such a fault
condition is possible, insert a 2A fuse in the input line.
CAUTION CLEANING THE MODULE. Clean the outside surfaces of this
module with a cloth slightly dampened with water. Do not attempt
to clean the interior of this module.
18 Configuring the Digitizer Modules Chapter 1
Configuring the Digitizers
This section gives guidelines to configure the digitizers, including:
• Adding RAM to the Module
• Setting the Logical Address Switch
• Setting the Interrupt Line
• Installing the Digitizer in a Mainframe
Adding RAM to the
Module
Selecting a RAMAlthough most commercially available PC SIMM RAM will work with the
You can increase the size of RAM on your Digitizer module by purchasing
PC SIMM memory and installing it on the module after you remove the
standard 4 Mbyte SIMM shipped with your digitizer. Both FPM (Fast Page
Mode) and EDO (Extended Data Out) are supported.
Digitizer, there are some that are physically too large and will make contact
with the top shield when installed. A standard 72 SIMM specifies the length
(L) or keying but does not specify the depth (D). Certain depths are too large
and not compatible.
The E1563/E1564 has about 17.6 mm of space from the bottom of the
SIMM RAM inserted in the socket to the top module shield (see Figure 1-3).
You must verify that the SIMM RAM you purchase for replacement on the
module has a depth (D) that will clear the top module shield. You can use
the 4 Mbyte SIMM RAM you remove as a guide, as well as the dimensions
in Figure 1-3, when purchasing your upgrade RAM .
L = 1.25in (31.77mm) max for D = 0.18, where D is from PC board lower side
where it rests on the bracket. D does not include the height of chips mounted
on the lower side of the board.
Figure 1-3. Adding RAM to the Module
Configuring the Digitizer Modules 19Chapter 1
RAM Installation
Procedure
NOTEIt is important that you retain the 4 Mbyte SIMM you remove from the
1 Disconnect any field wiring from the module and remove power from
the mainframe before proceeding.
2 Remove the module from the mainframe and remove the top shield
from the module.
3 Remove the 4 Mbyte SIMM from the PC board by first spreading the
tabs at the ends of the SIMM connector. Store this SIMM in an
anti-static bag and save this part.
Digitizer. If you return your Digitizer to Agilent for repair or exchange, you
must return it in the same configuration as it was shipped to you. You must
remove the large memory SIMM and replace it with the standard 4 Mbyte
SIMM shipped with the product.
4 Add your replacement SIMM to the module’s RAM socket.
5 Reinstall the module’s top shield.
6 Note the new memory configuration by checking the appropriate box
on the module’s top shield.
7 Set the “CALIBRATION CONSTANTS” switch and the “FLASH”
switch to the “Write Enable” position.
8 Install the module in the mainframe and apply power.
9 Set the new RAM memory size by sending
DIAGnostic:MEMory:SIZE <size>.
10 Query the memory size to verify the setting by sending
DIAGnostic:MEMory:SIZE?
11 Remove mainframe power, remove the module and set the
“CALIBRATION CONSTANTS” and “FLASH” switches back to the
“Read Only” position.
12 Reinstall the module in the mainframe.
WARNINGTIGHTEN THE FACEPLATE SCREWS. Tighten the faceplate mounting
screws to prevent electric shock in case of equipment or field wiring
failure.
20 Configuring the Digitizer Modules Chapter 1
Setting the Logical
Address Switch
NOTEWhen using an E1406A as the VXIbus resource manager with SCPI
The E1563A and E1564A Digitizers are shipped from the factory with logical
address 40. Valid logical address are from 1 to 254 for static configuration
(the address you set on the switch) and address 255 for dynamic
configuration. The E1563A and E1564A do not support dynamic
configuration of the address.
If you install more than one digitizer, each module must have a different
logical address. If you use a VXIbus command module, the logical address
must be a multiple of eight (e.g., 32, 40, 48, 56, etc.). Each instrument must
have a unique secondary address which is the logical address divided by
eight. See Figure 1-4 for guidelines to set the Logical Address Switch.
commands, the digitizer’s address switch value must be a multiple of 8.
Setting the Interrupt
Line
Figure 1-4. Setting the Logical Address Switch
The E1563A and E1564A Digitizers are VXIbus interrupters. You can
specify which interrupt line (1 through 7) the interrupt is transmitted. The
interrupt line is specified using DIAGnostic:INTerrupt:LINE. You can query
the active interrupt line using DIAGnostic:INTerrupt:LINE?. The default is no
interrupt line enabled at power-up. You specify “0” if you do not want an
interrupt. Resetting the module does change the interrupt line setting and
you must reset your interrupt setting.
Configuring the Digitizer Modules 21Chapter 1
Installing the
Digitizer in a
Mainframe
Set the extraction levers out.1
Extraction
Levers
The E1563A or E1564A Digitizer can be installed in any slot (except slot 0)
in a C-size VXIbus mainframe. See Figure 1-5 for the procedure to install the
Digitizer in a mainframe.
Slide the E1563/E1564 into any slot
2
(except slot 0) until the backplane
connectors touch.
4
Tighten the top and bottom screws
to secure the digitizer module
to the mainframe.
NOTE: The extraction levers will not
seat the backplane connectors on older
VXIbus mainframes. You must manually
seat the connectors by pushing in the
module until the module's front panel is
flush with the front of the mainframe. The
extraction levers may be used to guide or
remove the digitizer.
To remove the digitizer from the mainframe,
reverse the procedure.
Seat the digitizer into
3
the mainframe by pushing
in the extraction levers.
Figure 1-5. Installing the Digitizer in a Mainframe
22 Configuring the Digitizer Modules Chapter 1
User Cabling Considerations
This section gives guidelines to select and configure user-supplied cables
for connection to the Input Terminals and to the External Trigger
Input/Calibration Bus Output Terminals.
Input Terminal Port
Connector Cables
E1563A Digitizer. The E1563A Digitizer front panel includes two Switchcraft®
EN3™ Mini Weathertight Connectors (female) (CH-1 and CH-2). See Figure
1-1. Mating Switchcraft® Cord Connectors (male) are supplied with the
module. However, the user must provide the cable and assemble the
connector to the cable end. Recommended shielded, twisted-pair cable in
the following table have an outside dimension compatible with the cord
connector.
Wire gaugeBelden® cable P/NAlpha® cable P/N
20 AWG (7x28)8762none
22 AWG (7x30)94625481C
24 AWG (7x32)86415491C
E1564A Digitizer. The E1564A Digitizer front panel contains four
Switchcraft® EN3™ Mini Weathertight Connectors (female) (CH-1 through
CH-4). See Figure 1-2. Mating Switchcraft® Cord Connectors (male) are
supplied with the module. However, the user must provide the cable and
assemble the connector to the cable end. Recommended shielded,
twisted-pair cable in the following table have an outside dimension
compatible with the cord connector.
Wire gaugeBelden® cable P/NAlpha® cable P/N
20 AWG (7x28)8762none
22 AWG (7x30)94625481C
24 AWG (7x32)86415491C
Configuring the Digitizer Modules 23Chapter 1
Trigger Input Port
Cables
SAMPle:SOURce EXT
The user must supply a standard cable to the External Trigger Input port
(E1563A) or to the External Trigger Input/Calibration Bus Output port
(E1564A).
E1563A Digitizer. The E1563A front panel contains a 9-pin D-subminiature
connector with the pin-outs and associated SCPI commands shown in
Figure 1-6 (do not make any connections to the top two pins).
TRIGger:SOURce EXT
ROSCillator:SOURce EXT
Figure 1-6. E1563A External Trigger Input Port
E1564A Digitizer. The E1564A front panel contains a 9-pin D-subminiature
connector with the pin-outs and associated SCPI commands shown in
Figure 1-7.
CAL:SOURce INT
SAMPle:SOURce EXT
Figure 1-7. E1564A External Trigger Input/Calibration Bus Output Port
3-Wire and 2-Wire
Input Cabling
Considerations
CAL:SOURce INT
TRIGger:SOURce EXT
ROSCillator:SOURce EXT
The E1563A and E1564A Digitizers provide a three-terminal input system
(High, Low and Guard) in which an unavoidable and undesirable current is
injected from chassis ground to the Guard terminal. Dependent on whether
you measure on a low-voltage range or a high-voltage range, the way you
connect the Guard terminal may or may not introduce a measurement error
due to this current. This section describes some considerations you can
take to use the Guard terminal properly to minimize measurement error.
24 Configuring the Digitizer Modules Chapter 1
Digitizer Input ModelFigure 1-8 shows the input model for the digitizer. Maximum voltage
between Low and Guard is 5V. Exceeding this limitation will not damage
your digitizer but will generate invalid data for any measurement taken.
In general, 3-Wire cabling is recommended, but 2-Wire cabling is supported
for some switching applications.
Figure 1-8. Digitizer Input Model
Three-Wire ConnectionsThis section shows two examples of connecting the input using a three-wire
connection. Both example connections can be made using shielded,
twisted-pair connectors.
For the first example, Figure 1-9 shows one way to make connections for a
bridge measurement where the L-to-G voltage is £ 5V and the L-to-G
voltage exceeds 5V. A “Wagner ground” is used to satisfy the L-to-G
restriction of £ 5V and to make a Guard connection point that minimizes
measurement error due to the digitizer’s injected current. A capacitor is
added to the Wagner ground to provide a signal path to ground to minimize
common mode voltages.
For the second example, Figure 1-10 shows one way to measure the voltage
across a small current sensing resistor where the input to the digitizer is
switched through a multiplexer switch module.
Two-Wire ConnectionsWhen Low and Guard are connected together at the digitizer’s input on a
low-voltage range (4V and below), the injected current is directed to flow
through the source impedance (in a floating source) and the resultant
voltage drop will introduce a measurement error.
The resultant voltage drop through the source impedance can be a
significant error on low-voltage ranges where the voltage of interest is small.
It is not as significant an error on high-voltage ranges because the error
introduced is not a significant part of a larger voltage and the percent of error
is less significant.
Measurement error can increase significantly when you connect Low to
Guard at the digitizer’s input AND use switches to switch input signals to the
digitizer. Some switches have input protection resistors (usually 100W) in
series with the switch. The digitizer’s injected current now generates a
voltage drop across this resistor in addition to the voltage drop generated
across the source impedance. Even with a grounded source, an error
voltage is generated across the switches current limiting resistor.
Two examples of two-wire connections follow. For the first example, Figure
1-11 shows a typical connection using coaxial cable. For the second
example, Figure 1-12 shows connections for a differential source.
Step 1Strip cable as shown and feed the end of the cable through the boot, cable
Step 2Orient the HI, LO and Guard conductors with the corresponding pins.
This section gives guidelines to connect user-supplied cables to the cable
connector supplied with the E1563A and E1564A Digitizers. See "Terminal
Port Connector Cables" for recommended user-supplied cables.
clamp housing, and coupling ring in the order and position shown. The
coupling ring can also be inserted onto the cable connector from the front.
Configuring the Digitizer Modules 27Chapter 1
Step 3Solder conductors to pins.
CAUTION AVOID EXCESSIVE HEAT. Excessive heat on the connector
terminals can cause damage to the connector.
Step 4 Assemble the connector.
A. Align coupling ring’s tabs with cable connector’s side notches and push
the coupling ring onto the cable connector.
B. Push the cable clamp housing forward until it locks into the connector
body and snap the two clamps into their compartments to secure the cable.
C. Push the boot all the way forward to seat tightly onto the cable clamp
housing.
28 Configuring the Digitizer Modules Chapter 1
Cable Coupling Cable Clamp Boot
Connector Ring Housing
Step 5Mate the cable connector to the User Input Terminal Port.
1 Hold the cable connector by the rubber boot and align the notched
key slot with the key on the left side of the instrument’s front panel
connector. Insert the cable connector just enough to encounter
insertion resistance and stay in place.
2 Grasp the coupling ring and slowly rotate it clockwise, while you
gently push the connector toward the panel mount, until the notches
on the coupling ring drop into the front panel connector detents.
3 Continue rotating until you feel the coupling ring ride over the locking
“bump” which secures the connector to the instrument’s front panel
connector.
Configuring the Digitizer Modules 29Chapter 1
Initial Operation
NOTEThis discussion applies only to Standard Commands for Programmable
NOTEThe E1563A or E1564A Digitizer may have experienced temperature
To program the E1563A or E1564A Digitizer using Standard Commands for
Programmable Instruments (SCPI), you must select the interface address
and SCPI commands to be used. Information about using SCPI commands
is presented in Chapter 3.
Programming a digitizer using SCPI requires that you select the controller
language (C, C++, BASIC, Visual Basic, etc.), interface address and SCPI
commands to be used.
Instruments (SCPI) programming. The example program listed is written
using Virtual Instrument Software Architecture (VISA) function calls.
VISA allows you to execute on VXIplug&play system frameworks that
have the VISA I/O layer installed (visa.h “include” file).
extremes during shipment that can affect its calibration. It is recommened
you perform a zero offset calibration upon receipt using CAL:ZERO
<channel>:ALL? for each channel to meet the accuracy specifications
in Appendix A. See Appendix E for the zero adjustment procedure.
Example: Initial Operation
This C program verifies communication between the controller, mainframe
and digitizer. It resets the module (*RST), queries the identity of the module
(*IDN?) and queries the module for system errors.
#include <stdio.h>
#include <visa.h>
/*** FUNCTION PROTOTYPE ***/
void err_handler (ViSession vi, ViStatus x);