353Measure Mode and Display Selection Effects on Measurement Time

Selection of TRIGGERED results in a measurement rate the same as CONTINUOUS. Measure Mode CONTINUOUS. Selection of CONTINUOUS results in a measurement rate discussed in paragraph 3.5.2 above. CONTINUOUS is also the power-up default mode. Notice that in continuous mode, the measurement being made when the DUT is connected to the Digibridge is erroneous. Display Selection. The selection of BIN NO. display cuts 6 to 10 ms from the measurement time, compared to the other...

284Codes and Addresses

The device-dependent messages, such as instrument programming commands and measurement data (which the digital interface exists to facilitate), have to be coded in a way that is compatible between talkers and listeners. They have to use the same language. Addresses have to be assigned, except in the case of a single talker only with one or more listeners always listening. The Standard sets ground rules for these codes and addresses. In this instrument, codes for input and output data...

326 The 16579600 Extender Cable Banana Plugs and BNC Cable with Banana Plug Adaptors

1657-9600 Extender Cable (Recommended for 1659 Digibridge) The accessory extender cable 1657-9600 is available to connect to DUTs that are multiterminal, physically large, or otherwise unsuited for the built-in test fixture. (Refer to table of accessories and options, paragraph 1A.) This cable is particularly convenient for connecting multiterminal components with binding posts that accommodate banana plugs. a. Remove the adaptors, if present, from the test fixture. b. Plug the single-connector...

Table

REMOTE TEST FIXTURE CONNECTIONS VIA BNC CABLE Bias BNC Connector Color Code on Polarity at Digibridge 1689-9602 Cable Connection at 1689-9600 -9605 Test Fixture * * Left and right are defined with the fixture oriented for reading the legend. d. For the 1689-9605 remote test fixture -in order to activate the Start bar and the GO NO-GO lights connect the 1689-2400 Remote Tester Cable (supplied with the fixture) as follows. Connect one end to the HANDLER INTERFACE connector behind the instrument....

371Internal Bias

To measure capacitors with the internally available 2-volt dc bias voltage applied, use the following procedure. (The FUNCTION should be MEASURE. a. Press SHIFT INT BIAS keys so that the BIAS ON indicator is lit. NOTE This indication, for internal bias, is somewhat dimmer than the other keyboard indicators. b. Observe correct polarity when inserting DUT into test fixture. Bias POSITIVE polarity is at the LEFT (low terminals) of the 1659 Digibridge built-in test fixture. Bias NEGATIVE polarity...

Autoranging Measurement Ranges And Source Resistances

1 97.4 kohms mid 102 K mid 1600 pF f max 25 . 6 K 6.4 kohms mid 6.4 K mi n 1.6 K mi n 6.4 nF f mid 25.3 nF f max 100. nF f max 4100 mH f mid 1025 mH f min 256 mH f max 1600 ohms min 100 nF f mid 400 ohms mid 400 nF f min 100 ohms max 1600 nF f max 256 iriH f mid 64 mH f min 16 rrH f max 100 ohms min 1.6 uF f mid 25 ohms mid 6.4 uF f min .00001 ohm max 99999 mF max 16 mH f mid 4 mH f min .00001 mH * Selection of EXTERNAL BIAS makes Rs 25 ohms on all ranges see paragraph 3.7.2. ** K is kilohms 'M...

36 Accuracy The Limits Of Errors 361 General

Refer to the Specifications, at the front of this manual. The specifications apply at an ambient temperature of 23 degrees C (unless recalibration has been done at some other temperature), in low humidity, if the OPEN and SHORT zeroing procedures have been executed properly (paragraph 3.1). These specifications are valid when autoranging is used or the optimum range is set and held. When a non-optimum range is set and held, the accuracy may decrease (see paragraph 3.6.4). Typical accuracy is...

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 QuadTech warrants that Products are free from defects in material and workmanship and, when properly used, will perform in accordance with QuadTech's applicable published specifications. If within one (1) year after original shipment it is found not to meet this standard, it will be repaired, or at the option of QuadTech, replaced at no charge when returned to a QuadTech service facility....

352 Measure Rate Selection at Keyboard

Choose one of 3 basic measurement rates with the MEASURE RATE key SLOW, MEDIUM, or FAST. The measurement rates (continuous or triggered) are respectively about 2, 4, and 8 measurements per second, if the other test conditions are left at normal power-up defaults. The tradeoff is speed vs. accuracy. The Digibridge will make a more precise and accurate measurement at a slower rate. For the above conditions, in very simplified terms, the basic accuracy is 0.1 , and the tradeoff is as follows SLOW...

13controls 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. Figure 1-1. Front controls and displays. Upper illustration 1659 RLC Digibridge . Lower illustration keyboard detail. Figure 1-1. Front controls and displays. Upper illustration 1659 RLC Digibridge . Lower illustration keyboard detail.

35 Measurement Time And Measurement Ranges 351 General

Selection of MEASURE RATE (SLOW, MEDIUM, and FAST) obviously relates to measurement time, providing the user with an easily made choice. (The slower rates provide greater accuracy.) In this paragraph, the many items that affect measurement time are explained. The measurement time (required to complete a measurement and display the results) depends not only on the selected measure rate, but also on the test conditions, choice of display, whether data is being sent out to other devices, etc. The...

RANGES and Range Changing

Descriptions of ranges, range extensions, and decimal point control are explained below. Basic Ranges. The 4 basic ranges are numbered 1, 2, 3, 4, in order of decreasing impedance. Each basic range is approximately a factor of 16 wide. Refer to paragraph 3.4.2 for a table of ranges. The word upper as used below refers to increasing measured value (which is the direction of increasing range number only if the principal measured parameter is capacitance). Similarly, the word lower as used below...

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...

372External Bias

If bias is required at some other voltage than the 2-V internal bias, use external bias as described below. Also 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. Generally the external circuit must include switching for both application of bias after each DUT is in the test fixture and discharge before the DUT is removed. A...

281 Purposefigure

If you have the 1658-9620 interface option, you can connect' this instrument to a printer or into a system (containing a number of devices such as instruments, apparatus, peripheral devices, and generally a controller or computer) in which each component meets IEEE Standard 488-1978, Standard Digital Interface for Programmable Instrumentation. A complete understanding of this Standard (about 80 pages) is necessary to understand in detail the purposes of the signals at the IEEE-488 INTERFACE...

271 Interface via IEEE488 Bus Handler Interface Option 16589620

If you have the 1658-9620 interface option, connect from the HANDLER INTERFACE on the rear panel to a handler, printer, or other suitable peripheral equipment as follows. (The presence of the 24-pin connectors shown in Figure 1-3 verifies that 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....

Front Controls And Indicators

Digital display. 5 numerals with dec imal points and negative s i gn (-) when appli cable Display of principal measured value, function is MEASURE and display selection is VALUE, number indicates R, L, or C. If display selection is BIN No., indicates bin assignment of measured DUT. If function is ENTER, displays are indications of programmed entries, or status in calibration sequences. 2 Units and mu 11 i p 1 i e r s Digital display, 4 numerals with dec imal points and negative s i gn (-) when...

Page iv Table of Contents Parts Lists and Diagrams Section

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...

1211659 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...

327 The Effects of Cable and Fixture Capacitances

It is important to use very low-capacitance shielded wire for cables, not only for accuracy, but also to minimize resonance effects in the measurement of large inductance at high frequency. The Capacitances that are Most Liable to Affect Accuracy. Any test fixture extension cable adds a bit of capacitance in parallel with the DUT (because shielding of the leads is imperfect) and more between each terminal and ground. The zeroing process (paragraph 3.1.3) will compensate fully for the...

324 The 16899600 or 9605 Remote Test Fixture with 9802 BNC Cable Figure

Connection of the DUT at a remote test fixture normally requires Remote Test Fixture 1689-9600, 1689-9605, or equivalent special fixture. BNC Cable Assembly 1689-9602 (cable, 4 BNC to 4 BNC) BNC Adaptor 1689-9601 (connects 1659 built-in test fixture into 4 BNC connectors) This remote test fixture functions like the one supplied on the 1659 Digibridge. True Kelvin connections are made at the points of contact with the DUT leads. The recommended cable should be used (rather than any randomly...

331 Parameters Rq Lq Cd

The Digibridge as powered up provides you with automatic selection of parameters (unless keyboard has been locked with a particular parameter selected). This feature enables you to measure any passive component (without knowing whether it is essentially a resistor, inductor, or capacitor). It is provided at power-up and remains enabled as long as you do NOT select any Automatic parameter selection can be disabled by pressing any of the three parameter keys R Q, L Q, or C D....

Table of Contents

INTRODUCTION SECTION 1 1.1 Purpos e 1-1 1.2.1 1659 RLC Digibridge 1-2 1.2.2 Interface Options 1-2 1.2.3 References 1-2 .3 Contro1 s,Indicators, Connector s 1-2 . 4 Ac cessories 1-9 Condensed Operating Instructions . .1-12 INSTALLATION1 SECTION 2 2.1 Unpacking and Inspection Power-Line Connection . Line-Voltage Regulation Test-Fixture Connections Bias Voltage for the DUT 2.6.2 External Bias 7 Handler Interface 2.7.2 Timing IEEE-488 Interface (Option) 2.8.4 Codes and Addresses Environment .2-1...

23 Powerline Connectionfigure

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...

Principal Measurement Results

The principal Digibridge measurement will be presented on the left (RLC) part of the display panel in one of two ways VALUE or BIN No., (only one way for any single measurement). VALUE, Selected by the (DISPLAY) Key. This measurement provides two displays the principal one is RLC (resistance, inductance, or capacitance) and the secondary one is QD (quality factor with R or L, either dissipation factor with C). The VALUE selection is the power-up default and one of the selections of the DISPLAY...

11 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...

24 Linevoltage Regulation

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...

356 Time Required if IEEE488 Output is Enabled Figure

If data output is enabled, via IEEE-488 bus, additional time -about 2 ms to 12 ms is required per measurement. This time requirement depends on the selected display and what data is being sent out, approximately as follows. (Refer to explanation of operation with the IEEE-488 interface, paragraph 3.11.) Figure 3-8. Summary of the components of measurement time. Figure 3-8. Summary of the components of measurement time. Refer to Figure 3-8 for a summary of the segments of measurement time used...

Tub 22 IEEE488 Interface Key

Low state 'da ta Dl Ol, DlOS 1 ines Low state at least 1 listener on the bus is not ready For dala, Low statt at least 1 listener on the bus is not done accepting data Attention, specifies I of 2 uses for the DlOl 1)108 lines, as foil ows Low s la te controller conmand messages. Hi h statt data bytes fr m the talk.el device. Interface cltar. Low slate returns p-OrtiOn. of interface system to a known quiescent state. Service request. Low a talker or listener signals (to the controller) need for...

Table of Contents continued

3.12 Sample IEEE Programs 3-50 5.8 Ac curacy Ve r i f i ca t i on 5-30 3.12.1 Programming Hints 3-50 5.8.1 General 5-30 3.12.2 Hewlett Packard HP85 3-50 5.8.2 Capacitance Meas-Sm Med C 5-31 3.12.3 Capital Equip'mt .PC-488 3-50 5.8.3 Capacitance Meas-Lg.C,Rng4 5-34 3.12.4 Nat'l Instru'mts GPIB-PCII 3-51 5.8 . 4 Resistance Meas .Accuracy. .5-36 3.13 Self Checks & Failure Displays 3-51 5.8.5 Inductance Meas Accuracy. .5-37 3.13.1 Power-Up Self Check 3-51 5.8.6 D-Measurement Accuracy. . .5-39...

RLC and Dq Ranges

The table below gives the overal display ranges for the two quantities measured at the same time. The table below gives the overal display ranges for the two quantities measured at the same time. 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. 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...

314 Routine Measurement

Verify or select measurement conditions as follows indicated by keyboard lights press the adjacent key to change a selection. Function MEASURE FUNCTION key , a necessary selection Display VALUE DISPLAY key , for normal RLC QD results Measure rate SLOW MEASURE RATE key , for best accuracy Measure mode TRIGGERED MODE key , optional Equivalent circuit SERIES EQUIVALENT CIRCUIT key -see paragraph 3.3. If you are in doubt about how to connect the device to be tested with the Digibridge, refer to...

Page 518 Instrument Cleaning Instructions

Monthly more or less depending on usage the built-in test fixture should be cleaned with a soft brush and isopropyl alcohol. Avoid getting excess alcohol on instrument paint surfaces, otherwise damage to the finish can result. For additional instrument cleaning 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,...

Before operating the instrument inspect the power inlet module on the rear of the unit to ensure that the properly

The 1659 is shipped with a standard U.S. power cord, QuadTech PN 4200-0300 with Belden SPH-386 socket or equivalent, and 3 wire plug conforming to IEC 320 or an approved international cord set. Make sure the instrument is only used with these or other approved international cord sets, which ensures the instrument is provided with connection to protective earth ground. Instruction Manual Changes continued In all installations the instrument should be positioned with consideration for ample air...