Quadtech 1659 RLC Service manual

1659 RLC Digibridge®

Instruction Manual

FORM 1659-0120-02/Bl

®QuadTech, Inc., 1992
5 Clock Tower Place, 210 East

Maynard, Massachusetts, U.S.A. 01754

March, 2000

Telephone [phone]
Sales 800-253-1230
Facsimile 978-461-4295
Website www.quadtech.com

The material in this manual is for informational purposes only and is subject to change, without notice. QuadTech
assumes no responsibility for any enor or for consequential damages that may result from the misinterpretation of any
procedures in this publication.

Contents

Specifications
Warranty
Introduction -Section 1
Installation -Section 2
Operation -Section 3
Theory -Section 4
Service -Section 5
Parts Lists and Diagrams -Section 6

or modifications not

documented in the current manual. All references to GenRad in the manual now apply to

386 socket or equivalent, and 3 wire plug conforming to IEC 320) or an approved international

the instrument is only used with these or other approved international cord

These supplementary pages contain information of improvements

QuadTech, Inc.

Page iv -Table of Contents (Parts Lists and Diagrams -Section 6)

Power supply assembly, board layout and schematic (pages 6-13 & 6-14) replaced by
Power supply assembly part number 700011.

Page ix -Specifications (Environment, Power Requirements & Weight)

Power should be 90 -250Vac, 50 -60 Hz. Voltage switching is automatic and no

longer selected by rear panel switch. 60 watts maximum.

Weight should be 10 lbs. (4.5 kg) net, 15 lbs. (6.8 kg) shipping.
Environment reads, Altitude < 2000m, Installation Category 1, Pollution Degree 1

Page 1-2 -Paragraph 1.2.1,1659 RLC Digibridge

Voltage switching is automatic and no longer selected by rear panel switch.

Page 1-7 -Figure 1-2, Rear Controls and Connectors

Rear view should show new power supply assembly (PN 700011) without line-voltage
switch.

Page 1-7- Table 1-2, Rear Connectors and Controls

Ref No.1 -=-== External bias connector receives cable (1658-2450, supplied).
Fuse is 2/10A, 250V, 3AG Type, Fast Blow. Replace only with the same type and rating.
Ref No. 3 -Air filter has been deleted.

Ref No. 6 -Line-voltage switch has been deleted, power input is from 90 -250Vac.

Page 1-10 - Table 1-3, Accessories and Options

A quantity of two spare fuses are supplied, 6/10A, 250V, 3AG Type, Slow Blow

(QuadTech part number 5330-1100)

Bias cable (1658-2450) is supplied with built-in fuse. A quantity of one spare fuse is supplied,

2/10A, 250V, 3AG Type, Fast Blow (QuadTech part number 5330-3200)

The 1659 is shipped with a standard U.S. power cord, QuadTech PN 4200-0300 (with Belden SPH-

cord set. Make sure
sets, which ensures the instrument is provided with connection to protective earth ground.

e positioned with consideration for ample air flow to the
side and rear panel ventilation holes. An open space around the instrument of at least 3 inches
(75mm) is recommend. The surrounding environment should be free from excessive dust to

Paragraph 3.1.2 Startup, step a .

Paragraph 5.5.1, Disassembly of 1659 Digibridge, step h and i

Instruction Manual Changes (continued)

In all installations the instrument should b

prevent contamination of electronic circuits.

Page 2-2 -Power-Line Connection

Power line switch for 115V or 230V operation has been removed, switching is

automatic for voltages between 90 -250Vac.

Figure 2-2 does not apply. Only certified line cords which comply with IEC 227 or IEC 245 should be used.

Page 3-1 -

Power line switch for 115V or 230V operation has been removed, switching is

automatic.

Page 5-3 -Paragraph 5.3, Repair and Replacement of Circuit Boards

Contacts for QuadTech: Sales & Service 800-253-1230 Technical Assistance 978-461-2100

Page 5-4 -Table 5-1, Caution Note

Power line switch for 115V or 230V operation has been removed, switching is automatic.

Page 5-7 -Figure 5-1, Rear and Bottom View

Rear view should show new power supply assembly (PN 700011) without line voltage switch.

Page 5-12 -

Delete step h, there is no longer a protective cover. CAUTION note does not apply,
the fan has been removed.
Step i, the 700011 power supply is secured by only 4 screws rather than 5.

Page 5-13 -Figure 5-6, Removal of Power Supply Assembly

Power Supply Assembly shown, PN 1689-2005, has been replaced by Power Supply

Assembly, PN 700011.

with a soft brush and isopropyl alcohol. Avoid getting excess alcohol on instrument paint

ge to the finish can result. For additional instrument cleaning

Instruction Manual Changes (continued)

Page 5-18 -Instrument Cleaning Instructions

Monthly (more or less depending on usage) the built-in test fixture should be cleaned

surfaces, otherwise dama
instructions refer to paragraph 5.6.1 (Care of the Test Fixture) and paragraph

5.6.3 (Care of the Display Panel).

Page 5-19 -Paragraph 5.6.2, Cleaning the Air Filter

Delete paragraph, air filter has been removed.

Page 5-27 -Paragraph 5.7.4, Power Supply

Trouble analysis procedure does not apply to the new Power Supply Assembly, PN

700011.

Page 6-2 -Figure 6-2, Rear View

Rear view should show new power supply assembly (pN 700011) without line-voltage

switch.

Page 6-3 -Mechanical Parts List, Rear

Items 4 through 7 (power connector, fuse extractor post, line voltage switch and
cover) deleted on new power supply assembly.

Page 6-13 & Page 6-14 -Parts Lists and Diagrams

Power Supply Assembly shown, PN 1689-2005, has been replaced by Power Supply

Assembly, PN 700011. The 700011 Assembly must be repaired by module exchange.

III IV

v

1659 RLC Digibridge

MEASUREMENT PARAMETERS and MODES

Series or parallel Rand Q, L and Q or C and D selected by the EQUIVALENT CIRCUIT key and the R/Q,
L/Q and C/D keys. Continuous, triggered (single) or averaged (set of 10) measurements selected by the MODE key. The
START button iniatiates triggered or averaged measurements. Parameter selection is initially made automatically based on the
DUT being measured. Automatic selection is inhibited once a specific parameter key has been selected by the user.

DISPLAYS: LED-TYPE NUMERICAL

When the MEASURE function has been selected, either VALUE or BIN NO. may be displayed. The VALUE
display provides five digits for measured R, L or C value and four digits for D or Q with automatically positioned decimal
points, units of measurement and minus signs when appropriate. The BIN NO. display provides a single
digit bin assignment number based on the measured value and user entered bin limits. When the ENTER function has been
selected, the display will indicate either the nominal RLC value or bin limits, entered or recalled
by the user.

MEASUREMENT RATES

Approximately 2, 4 and 8 measurements/second for the three keyboard MEASURE RATE selections SLOW,
MEDIUM and FAST.

TEST FREQUENCIES

There are four test frequencies: 100Hz, 120Hz, 1kHz or 10kHz, selected by the SHIFT and FREQUENCY
keyboard buttons. Frequency accuracy is .01%

APPLIED VOLTAGE

Ac test signal is 0.3 V rms maximum. Internal dc bias is 2 V. External dc bias of up to 60 V may be

applied.

CHARGED CAPACITOR PROTECTION

The instrument is protected from damage due to the connection of capacitors with up to one joule of stored

energy.

VI

CALIBRATIONS

An OPEN circuit zero calibration can be performed to remove the effects of stray capacitance and

conductance shunting the internal test fixture or any other fixture or cable connection. A similar SHORT circuit zero
calibration can be performed to remove the effects of resistance and inductance in series in the test connections. New zero
calibrations should be made to obtain best accuracy whenever the test frequency or the fixture geometry is changed. A
complete recalibration of the internal standards for each measurement range may be performed by using the optional 1689­9604 Calibration Kit.

Measurement range is automatically set by the unit for best accuracy and resolution. Automatic ranging can be inhibited
by the keyboard's RANGE HOLD key.

RLC and DQ ACCURACY

The table below gives the RLC and DQ accuracy for measurements made at the SLOW rate. The RLC accuracy given

is valid when the phase angle of the component measured is low ( Q of R < 0.1, Q of 1 > 10 or D of C < 0.1). Additional
factors are given below the table for other conditions.

Each RLC accuracy expression has three terms: the basic accuracy (0.1% of reading), an added fixed error which

dominates when measuring very low values and an added % error term which dominates when measuring very high values.

The DQ error is fixed (i.e., not a percent), and the expression given holds over the RLC ranges where the
added low value or high value RLC error terms are negligible.

These accuracy specifications assume that an OPEN and SHORT zeroing calibrations have been made at the
selected test frequency.

VII

DQ ACCURACY AT EXTREME RLC RANGE

When a High End or Low End RLC error term is not small compared to the basic 0.1% accuracy, multiply

the above D or Q accuracies by the RLC accuracy (in percent) divided by 0.1%

SORTING

10 Bins: 8 pairs of RLC limits, one DQ limit, one fail bin. GO/NO-GO lights.

DUT CONNECTIONS

There is a built-in test fixture which will accept most common axial and radial leaded components. Four

terminal (Kelvin) connections are made to the DUT.

up to verify proper operation and validity of calibration. Coded error signals on the display

KEYBOARD LOCK

The keyboard can be locked to prevent inadvertent changes to test conditions and sorting routines.

PARAMETER STORAGE

All keyboard setting and programmed nominal values and bin limits can be stored in non-volatile memory

for automatic reentry upon power-up.

SELF-CHECK DIAGNOSTICS

Self-tests are performed during power-

notify the operator if a problem is encountered.

viii

ix

ENVIRONMENT

Operating; 0 to 50 degrees C, < 85% RH
Double specifications below 15 and above 35 degrees C.
Storage; -40 to + 74 degrees C.

ACCESSORIES SUPPLIED

Power cord, axial-lead adaptors, bias cable and instruction manual.

ACCESSORIES AVAILABLE

IEEE/Handler Interface, 1658-9620 (see above)
BNC Adaptor, 1689-9601
Extender Cable with alligator clips and banana jacks, 1657-9600
Extender Cable with Kelvin Clips, 1689-9606
Extender Cable with 874 connectors, 1688-9600
Extender Cable BNC to BNC, 1689-9602
SMD tweezers, 1689-9603
Remote Test Fixtures, 1689-9600 or 1689-9605
Calibration Kit, 1689-9604

POWER REQUIREMENTS

90 to 125 V or 180 to 250 Vac, 50 to 60 Hz.
Voltage selected by rear panel switch. 50 W maximum.

MECHANICAL DIMENSIONS

(Wx H x D): 14.8" x 4.4" x 13.5" (375 x 112 x 343 nm)

Weight: 13 lbs. (5.9 kg) net, 18 lbs. (8.2 kg) shipping

SERVICE POLICY

QuadTech policy is to maintain product repair capability for a period of five (5) years after original
shipment and to make this capability available at the then prevailing schedule of charges.

impedance without any critical internal adjustments. Calibration to

INTRODUCTION 1-1

1.1 PURPOSE

The 1659 RLC Digibridge is a microprocessor- controlled, automatic, programmable RLC measuring
instrument that provides accurate measurement, convenience, speed, and reliability at low cost. Limit comparison, binning,
and internal bias are provided; four test frequencies are available for selection. With an interface option, the Digibridge tester
can communicate with other equipment and respond to remote control.

The verstaile, built--in test fixture, lighted keyboard, and informative display panel makes the Digibridge tester
convenient to use. Measurement results are clearly shown with decimal points and units, which are automatically presented to
assure correctness. Display resolution is 5 full digits for R, L, and C and 4 full digits for D and Q.

The basic accuracy is 0.1 %. Long-term accuracy and reliability are assured by the measurement system, which makes
these accurate analog measurements over many decades of
account for any change of test--fixture parameters is semiautomatic; the operator needs to provide only open-circuit and short-

-circuit conditions in the procedure. The Digibridge tester normally autoranges and automatically identifies the principal
measurement parameter.

The test fixture, with a pair of plug-in adaptors (supplied), receives any common component part (axial-lead or radial­lead), so easily that insertion of the device under test (DUT) is a one-hand operation. True 4-terminal connections are made
automatically. Extender cables are available for measurements at a moderate distance from the instrument. They are optional
for the 1659 (which has a built--in test fixture, but requires extension typically for bulky components or parts in an automatic
handler).

Limit comparisons facilitate sorting into 8 GO and 2 NO-GO bins.

Selectable test conditions include:

4 Test frequencies (100 Hz, 120 Hz, 1kHz, and 10 kHz)
Measurement speeds up to 8 per second.
Measurement routine with averaging of 10 measurements.
Displays: measured values, GO/NO-GO, binning.
Automatic output of value, bin number, via IEEE-488 bus when this option is used.

1-2 INTRODUCTION

Bias can be applied to capacitors being measured, either by programming the selection of an internal supply (2 V) or

by sliding a switch to connect an external voltage source (up to 60 V).

The IEEE/Handler option provides full "talker/listener" and "talker only" capabilities consistent with the standard
IEEE-488 bus. (Refer to the IEEE Standard 488-1978, Standard Digital Interface for Programmable Instrumentation. See
para 2.8, in Section 2.) A separate connector also interfaces with component handling and sorting equipment.

1.2 GENERAL DESCRIPTION

1.2.1 1659 RLC Digibridge

Convenience is enhanced by the arrangement of test fixture and controls on the front ledge, with all controls
for manual operation arranged on a lighted keyboard. Above and behind them, the display panel is inclined and recessed to
enhance visibility of digital readouts and indicators. These indicators and those at the keyboard serve to inform and guide the
operator in manipulating the simple controls, or to indicate that remote control is in effect.

The 1659 instrument stands on a table or bench top. The sturdy metal cabinet is durably finished, in keeping with the
long-life circuitry inside. Glass-epoxy circuit boards interconnect and support high-quality components to assure years of
dependable performance.

Adaptability to any common ac power line is assured by the removable power cord and the convenient linevoltage
switch. Safety is enhanced by the fused, isolating power transformer and the 3-wire connection.

1.2.2 Interface Options

The IEEE/Handler interface option adds I/O capabilities to the instrument, enabling it to control and respond to
parts handling/sorting equipment. Also (via separate connector) either option can be connected in a measurement system
using the IEEE-488 bus. Either "talker/listener" or "talker only" roles can be performed by the Digibridge, by switch
selection.

1.2.3 References

Electrical and physical characteristics are listed in Specifications at the front of this manual. Interface connections and
instrument dimensions are given in Installation, Section 2. Controls are described below in Section 1; their use, in Operation,
Section 3. A functional description is given in Theory, Section 4.

1.3 CONTROLS, INDICATORS, AND CONNECTORS

Figure 1-1 shows the controls and indicators on the front of the 1659 instrument. Table 1-1 identifies them with

descriptions and functions.

Similarly, Figure 1-2 shows the controls and connectors on the rear of the 1659 and Table 1-2 identifies them.

INTRODUCTION 1-3

Figure 1-1. Front controls and displays.

Upper illustration: 1659 RLC Digibridge@. Lower illustration: keyboard detail.

1-4 INTRODUCTION

INTRODUCTION 1-5

1-6 INTRODUCTION

INTRODUCTION 1-7

1-8 INTRODUCTION

1.4 ACCESSORIES

re at the nearest Digibridge Technical Support Center.

NOTE

The GenRad line of Digibridge test fixtures, adaptors,

ad sales office for the

INTRODUCTION 1-9

GenRad makes several accessories that enhance the usefulness of each Digibridge. The axial-lead adaptors (provided) convert
the test fixture to a configuration well suited for axial-lead components. A choice of extender cables facilitates making connection to a
parts handler or to any DUT that does not readily fit the test fixture.
Extender cables are available with your choice of banana plugs, BNC, or type 874 connectors. Each cable branches into 4 parts, for true 4­terminal connections (and guard) to the device being measured, without appreciable reduction in measurement accuracy. A remote test
fixture is available to receive hand-inserted components at a distance from the Digibridge.

Other useful accessories are offered. Refer to Tables 1-3, 1-4 and inqui

(Refer to the back of this manual.)

and other accessories does continue
to be improved and expanded. Inquire periodically
at your local GenR
latest information.

1-10 INTRODUCTION

INTRODUCTION 1-11

shipping carton and the padding material for the

INSTALLATION 2-1

2.1 UNPACKING AND INSPECTION. 2-1

2.2 DlMENSIONS 2-1 2.3 POWER-LINE CONNECTION 2-2

2.4 LINE-VOLTAGE REGULATION 2 -3

2.5 TEST-FIXTURE CONNECTIONS 2- 3

2.6 BIAS VOLTAGE FOR THE DUT 2- 3

2.7 HANDLER INTERFACE (OPTION) 2-4

2.8 IEEE-488 INTERFACE (OPTION) 2-8

2.9 ENVIRONMENT 2-13

2.1 UNPACKING AND INSPECTION

If the shipping carton is damaged, ask that the carrier's agent be present when the instrument is unpacked.
Inspect the instrument for damage (scratches, dents, broken parts, etc.). If the instrument is damaged or fails to meet specifications, notify
the carrier and the nearest GenRad field office. (See list at back of this manual.) Retain the
carrier's inspection.

2.2 DIMENSIONS Figure 2-1.

The instrument is supplied in a bench configuration, i.e., in a cabinet with resilient feet for placement on a table. The overall

dimensions are given in Figure 2-1.

instrument. In addition, the center ground pin is longer,

2-2 INSTALLATION

2.3 POWER-LINE CONNECTION Figure 2-2.

The power transformer primary windings can be switched, by means of the line voltage switch on the rear panel, to
accommodate ac line voltages in either of 2 ranges, as labeled, at a frequency of 50 or 60 Hz, nominal.
Making sure that the power cord is disconnected, use a small screwdriver to set this switch to match the measured voltage of
your power line.

If your line voltage is in the lower range, connect the 3-wire power cable (PIN 4200-0300) to the power connector on

the rear panel (Figure 1-2) and then to the power line.

The instrument is fitted with a power connector that is in conformance with the International Electrotechnical
Commission publication 320. The 3 flat contacts are surrounded by a cylindrical plastic shroud that reduces the possibility of
electrical shock whenever the power cord is being unplugged from the
which means that it mates first and disconnects last, for user protection. This panel connector is a standard 3-pin grounding­type receptacle, the design of which has been accepted world wide for electronic instrumentation. The connector is rated for
250 V at 6 A. The receptacle accepts power cords fitted with the Belden type SPH-386 connector.

The associated power cord for use with that receptacle, for line voltages up to 125 V, is GenRad part no. 4200-0300. It
is a 200-cm (6.5 ft), 3-wire, 18-gage cable with connector bodies molded integrally with the jacket. The connector at the
power-line end conforms to the "Standard for Grounding Type Attachment Plug Caps and Receptacles", ANSI C73.11-1966,
which specifies limits of 125 V and 15 A. This power cord is listed by Underwriters Laboratories, Inc., for 125 V, 10 A.

If your power line voltage is in the higher range (up to 250 V), be sure to use a power cord that is approved for 250 V.
The end that connects to the Digibridge tester should have a connector of the type that is on the power cord supplied; the
other end, an approved connector to mate with your standard receptacle. A typical configuration for a 250-V, 15-A plug is
illustrated in Figure 2-2.

If the fuse must be replaced, be sure to use a "slow blow" fuse of the current and voltage ratings shown on the rear

panel, regardless of the line voltage.

2.4 LINE-VOLTAGE REGULATION

2.5 TEST-FIXTURE CONNECTIONS

NOTE

The GenRad line of Digibridge test fixtures,
adaptors, and other accessories does continue to be
improved and expanded. Inquire periodically at
your local GenRad sales office for the latest

2.6 BIAS VOL TAGE FOR THE DUT

2.6.1 Internal Bias

2.6.2 External Bias

INSTALLATION 2-3

The accuracy of measurements accomplished with precision electronic test equipment operated from ac line sources
can often be seriously degraded by fluctuations in primary input power. Line-voltage variations of +/-15% are commonly
encountered, even in laboratory environments. Although most modern electronic instruments incorporate some degree of
regulation, possible power-source problems should be considered for every instrumentation setup. The use of line-voltage
regulators between power lines and the test equipment is recommended as the only sure way to rule out the effects on
measurement data of variations in line voltage.

Because an unusually versatile test fixture is provided on the front shelf of the instrument, external testfixture
connections are generally NOT required. Simply plug the device to be measured (DUT) into the test fixture, with or without
its adaptors. For details, refer to paragraph 3.2.

Accessory extender cables are available to connect to a DUT that is multiterminal, physically large, or otherwise
unsuited for the built-in test fixture. Extender cables are needed, similarly, to connect from the Digibridge test fixture to the
DUT socket in a mechanical parts handler. Cables and adaptors are listed in Table 1-3. Connection details are given in
paragraph 3.2.

information.

No external connections are required for the internal 2-volt bias. The circuit is self contained.

External bias can be provided by connecting a suitable current-limited, floating dc voltage source, as follows.

Be sure that the voltage is never more than 60 V, max.
A current limiting voltage supply is recommended; set the limit at 200 mA, max.
Be sure that the bias supply is floating; DO NOT connect either lead to ground.
A well-filtered supply is recommended. Bias-supply hum can affect some measurements,
particularly if test frequency is the power frequency.

Generally the external circuit must include switching for both application of bias after each
DUT is in the test fixture, and discharge before it is removed.
Connect the external bias voltage supply and switching circuit, using the 1658-2450 cable,
supplied, via the rear-panel EXTERNAL BIAS connector. Observe polarity marking on the
rear panel; connect the supply accordingly.

9620 interface option, connect from the HANDLER INTERFACE on the rear panel to a handler,

3 verifies

488 Bus / Handler

collector drivers

ull each signal line to a low voltage when that signal is active and let it float when inactive. Each external circuit

CAUTION

The cautionary note above means typically that each relay or other inductive load requires a clamping diode (rectifier)

NOTE

The "end of test" signal EOT is provided by the
Digibridge only while binning is enabled, by

zero "nominal value" in memory.

2-4 INSTALLATION

2.7 HANDLER INTERFACE (OPTIONAL)

2.7.1 Interface via IEEE-488 Bus / Handler Interface Option (1658-9620)

If you have the 1658­printer, or other suitable peripheral equipment as follows. (The presence of the 24-pin connectors shown in Figure 1­that you have one of the interface options). Refer to Table 1-2 for the appropriate connector to
use in making a cable. Refer to Table 2-1 for the key to signal names, functions, and pin numbers.

Connect the bin control lines to the handler. See Table 2-1. Notice that the 1658-9620 IEEE-

Interface Option card provides outputs for automatic sorting into 10 bins. (Refer to paragraph 3.8.)

As indicated in the Specifications at the front of this manual, the output signals come from open-

that p
must be powered by a positive voltage, up to 30 V (max), with sufficient impedance (pull-up
resistors) to limit the active-signal (logic low) current to 16 mA (max).

Provide protection from voltage spikes over 30 V.

across it (cathode connected to the power-supply end of the load).

The input signal is also active low and also requires a positive-voltage external circuit, which must pull the signal line
down below 0.4 V, but not less than 0.0 V, i.e., not negative. The logic-low current is 0.4 mA (max). For the inactive state
(logic high), the external circuit must pull the signal line above +2.5 V, but not above +5 V.

having a non­Refer to paragraph 3.8 for details.

INSTALLATION 2-5

* Interface plug-in options: 1658-9620.
** Low-power dc bus (+5 V) available for systems use, commonly for opto-couplers.
CAUTION: limit the load to 25 mA, max.
*** EOT is enabled if binning is enabled (by having a non-zero nominal value).

2-6 INSTALLATION

Figure 2-3. Handler interface timing diagram.

Notes on handler interface timing diagram, Figure 2-3. External circuit must keep a-b > 1 us, and (if
START is not "debounced") a-c < [the settling time or programmed delay]. For single measurements, the DUT can be
disconnected after e. The selected BIN line goes low at f; the other BIN lines stay high. AVERAGE measurement routines,
ACQ OVER goes low (e) at the end of the last measurement.

2.7.2 Timing Figure 2-3.

Refer to the accompanying figure for timing guidelines. Notice that START must have a duration of 1 us
(minimum) in each state (high and low). If START is provided by a mechanical switch without debounce circuitry, the
Digibridge will make many false starts; if START does not settle down (low) within the default settling time after the first
transition to high, the measurement time may increase substantially.

Measurement starts at time d, which is essentially the same as time b or c; measurement is completed at g. (The
START signals are expanded for clarity.) Interval a-e, during which the DUT must remain connected for data acquisition, is
considerably shorter than the total measurement time a-g. The DUT can be changed after e ("indexing on ACQ", to save time)
or after g ("indexing on EOT", for a simpler test setup), as explained below.

After the calculation interval e-f, measurement results are available for sorting, i.e., one of the BIN lines goes low. A
few micro-seconds later, EOT goes low (can be used to set a latch holding the bin assignment). ACQ OVER, the selected BIN
line, and EOT then stays low until the next start command.

The time required for measurement depends on test conditions and operating selections. Interval a-e can be
less than 15 ms; the cycle a-g can be less than 40 ms; refer to paragraph 3.5 for details.

Set up the handler either of two ways: indexing on EOT or indexing on ACQ, as follows. The handler must supply a

signal (here called "start next measurement") when it has completed connection of the DUT to the test fixture.