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....

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...

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....

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.

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...

282 Interface Functions Figure

The following functions are implemented. Refer to the Standard for an explanation of the function subsets, represented by the identifications below. For example, T5 represents the most complete set of talker capabilities, whereas PPO means the absence of a capability. T5, talker (full capability, serial poll) SR1, request by device for service from controller RL2, remote control (no local lockout, no return-to-Iocal switch) DT1, device trigger (typically starts measurement) C0, no controller...

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...

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...

381 Introduction to Binning Sorting Based on Limit Comparisons

If a group of similar DUTs are to be measured, it is often convenient to use the limit-comparison capability of the Digibridge to categorize the parts. This can be done in lieu of or in addition to recording the measured value of each part. For example, the instrument can be used to sort a group of nominally 2.2-uF capacitors into bins of 2 ,5 , 10 ,20 , lossy rejects, and other rejects. Or it can assign DUTs to bins of (for example) a 5 series such as 1.8, 2.0,2.2,2.4,2.7 uF, etc. The bin...

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...

262External Bias

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...

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...

Secondary Measurement Results

The secondary Digibridge measurement will be presented on the right (QD) display panel, for each measurement if the DISPLAY selection is VALUE. There is no secondary display if the selection is BIN NO. NEGATIVE QD. A negative QD lias tire following meanings. Parameter Selection + QD If the secondary measurement is negative -Q, D as calculated by the Digibridge when selected parameter is L Q, O D -then there are two likely possibilities. If the Q or D value (whichever is being displayed) is very...

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...