00021 084

of Ls or Cs of Ls or Cs of measd Rs reactance and resistance, respectively * Xdut and Rsdut represent the DUT's series ** Aid error is significant only for extension beyond normal DUT interface, where the system software applies compensation. 3.6.8 Use of Signal Reversing (Special Function) for Tests at Power Frequencies The special signal reversing function is primarily for use whenever the test frequency is 60 or 120 Hz (if your power frequency is 60 Hz) or whenever it is 50 or 100 Hz (if...

310 Special Functions

Most of the special functions are described in more detail in other parts of the manual. Refer to Table 3-9 for a brief summary of the special functions and how to operate the SPECIAL key. Programming of special functions can be done only in ENTER function. 1. Setting Autorange (normal) the Range Hold range 1 Hold range 2 Hold range 3 Hold range 4 No output (max meas Bin numbers only QPR results QDR and bin RLC results RLC and bin RLC and qpR bin numbers full data ful1 data on FAIL ful1 data on...

311 Operation With A Handler

If you have the interface option and have made the system connections to a handler (paragraph 2.7), the Digibridge operating procedure is as follows. a. Set up the handler either of two ways indexing on EOT or indexing on ACQ, as explained below. The handler must supply a signal (here called start next measurement) when it has completed connection of the DUT. Indexing on EDT. Set up the handler to respond to the EOT signal from the Digibridge, which occurs at the end of test, when the bin...

3122Talk Only Use for Data Output

This pertains to a relatively simple system, with the Digibridge outputting data to one or more listen only (IEEE-488 compatible) devices such as a printer. a. Set the TALK switch to TALK ONLY. b. Program the Digibridge to send out results automatically after each measurement. (Refer to paragraph 3.10.) The special commands for this purpose can be executed only in ENTER function, as follows. b. Program the Digibridge to send out results automatically after each measurement. (Refer to paragraph...

3123 Talk Listen Use for Remote Programming and Data Transfers

Observe the REMOTE CONTROL indicator light. If it is lit, there is no opportunity for manual operation (except switching EXTERNAL BIAS ON and OFF and use of the START button if manual start is enabled.) The displays may be observed then, but their content is controlled by the system controller, via the IEEE-488 bus. Details of test program preparation are beyond the scope of this manual. Refer to Table 3-18 for an example of message activity during a control sequence in which the controller...

334 Units Multipliers and Blank Displays

Units of R, L, and C are determined entirely by your selection of parameter. Units multipliers are fixed by parameter, range, and frequency, except that selection of delta changes the RLC display to a percentage. See Table 3-2. Units of D and Q are dimensionless and are expressed as a decimal ratio, without multiplier --unless you select DQ IN PPM, in which case D or Q is expressed in parts per million (see below). To obtain D or Q in percent, from the regular display, move the decimal point...

335 DQ in PPM

The Digibridge can easily be programmed to display the secondary test result --when it it either D or Q --in parts per million. To choose this display, press SHIFT DQ in PPM so that the DQ IN PPM indicator is lit. To disable this option, repeat the same keystrokes so that the indicator is NOT lit. Units of D and Q in PPM are dimensionless and are expressed as a decimal ratio, with the multiplier of 1,000,000 understood. To obtain D or Q in percent, from the DQ in PPM display, place a decimal...

341 Test Frequency

Power-up frequency is 1 kHz, unless the keyboard has been locked with some other choice. There are 503 available frequencies, as detailed below. Selection. To select the test frequency, simply key in the desired frequency as follows, and the Digibridge will automatically obtain the nearest available one. a. Select ENTER with the FUNCTION key. b. Enter the desired frequency in kilohertz and press SHIFT FREQUENCY in sequence, as follows. For example, to select 500 Hz, press Up to 6 digits and...

342 Test Voltage

The power-up test voltage is 1.0 volt rms, unless the keyboard has been locked with some other choice. There are a total of 255 choices .005 to 1.275 V in increments of .005 V. To program the test voltage a. Select ENTER with the FUNCTION key. b. Enter the desired voltage in volts and press SHIFT VOLTAGE , in sequence as follows. For example, to select 750 m V rms, press The accuracy of the programmed source voltage is + - (5 + 2 mV) (1 + .001 j2) , where f value of test frequency in kHz. The...

344 Constant Current Source

To provide a constant-current source for any measurement, select and hold a range such that the source resistance is much larger than the DUT impedance. (See table of ranges, above.) Thus a. Select ENTER function with the FUNCTION key. b. Select and hold a range as follows (See also paragraph 3.10.) For source resistance 97.4 kilohms (range 1) press 1 SHIFT SPECIAL 1 For source resistance 6.4 kilohms (range 2) press 2 SHIFT SPECIAL 1 For source resistance 400 ohms (range 3) press 3 SHIFT...

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.) Programming a DELAY (typically because the normal settling time is insufficient for a particular handler or biasing routine) also obviously affects measurement time. In this paragraph, the many items that affect measurement time are explained. The measurement time (required to complete a measurement and display the...

3510 Measurement Time Summary Figure

To summarize the relationships of measurement time to a representative set of the many possible test conditions and operating selections, refer to Table 3-4 and the accompanying figure. Notice that the table applies to the 1689 Digibridge. Below the table are corrections that indicate about how much less time is required by the 1689M Digibridge. Tab Ie 3-1 1689 D1GIBRID TYPICAL NtASLJREYENT TfVES VS FRBQUFKY AM3 MEASURE RATE PGR DIGIBRIDGE WITH HIOi- PEED MEASURIM T OPTION -

355 Integration Time Factor a Special Function

The length of time that the Digibridge spends integrating analog voltages in the process of data acquisition can be varied by programming a number called the integration-time factor, if the measure rate is selected to be FAST or MEDIUM. In general, programming the I- T factor to a larger value allows the Digibridge to integrate over more cycles of the test signal, thus increasing the measurement time and enhancing the accuracy. (If the measure rate is SLOW, integration time is automatically...

357 Time Required tor Obtaining Median Values and Averaging

Accuracy can be enhanced, at the cost of increased measurement time, by either or both of these methods. The time considerations and a brief instruction for selecting each method (while in the ENTER FUNCTION) are given here. Median Value. This measurement time is somewhat less than triple the single measurement time, because three nearly complete measurements are made, from which the Digibridge selects the median for final results. To be more specific, each median-value measurement requires...

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), and the quick-acquisition feature is NOT selected. Typical accuracy is described below, for convenience in obtaining a birds-eye view of the way it relates to the principal test conditions, instrument...

364Selection of Median Value for Better Accuracy

The Digibridge can be programmed to make measurements in one or more groups of three and take for results the median value in each group. If you also select averaging (of 5 for example), the median values of (5) groups will be averaged. Examples of uses for the median-value capability are given below. If the median-value capability is enabled, the Digibridge makes three measurements, discards the highest and lowest results, and uses the median result for further calculations (if any), such as...

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...

382 Sorting Methods

The figures illustrate 2 basic methods of sorting nested and sequential. Nested limits are the natural choice for sorting by tolerance around a single nominal value. The lower numbered bins must be narrower than the higher numbered ones. Symmetrical limit pairs are shown but unsymmetrical ones are possible. (For example, range AB could be assigned to bin 3 and range FG to bin 4 by use of unsymmetrical limit pairs in these bins.) Sequential limits, on the other hand, are the natural choice for...

384 Verification or Nominal and Limit Values

While the function is ENTER, the exact values entered into the Digibridge can be seen by either of 2 methods, as follows. During the Entry Process. A confirming display is automatically provided immediately after the final keystroke of each entry step. For example, after the NOM VALUE keystroke, the entered value appears on the RLC display. After the BIN NO and number keystrokes, the actual limits of RLC value (not percentages) appear across the full display area upper limit on the regular RLC...

388 Bin Sum Information

If comparison (binning) is enabled, the Digibridge automatically keeps totals of the number of measurements assigned to each bin since power-up (or reset of the count to zero). The sums can be called up onto the display or sent out over the IEEE-488 bus. To make use of the bin-sum feature use these keystroke sequences. bin number at right. IEEE-488 bus > zero bin number at right. IEEE-488 bus > zero

389 Binning and Ratio Measurement Simultaneously

In order to bin-sort component parts whose values lie beyond the normal measurement range of the Digibridge, you must combine ratio measurement (paragraph 3.3.7) with limit comparisons and binning (paragraph 3.8). You should first become familiar with both ratio measurement and binning procedures because the combined procedure (as follows) can be somewhat tricky. Just as the display is a dimensionless number in ratio measurement, so the limit comparisons are made on dimensionless ratios in this...

393 Summary of Interrogations

Certain status (and results) information is indicated automatically on the display panels. For example Indicators below RLC display parameter and or units of measurement. All units and indicators unlit --display is either bin no. or ratio. NEG RLC --negative L or C or (for displays of delta or deltaRLC) measured value less than stored nominal. NEG QDR --capacitive resistor or apparently negative loss factor. RANGE HELD --autoranging is disabled. CONST VOLT --source resistance held to 25 ohms...

Bin No assignment is not available

The set of commands used in remote programming is an input data code to which the instrument will respond as a talker listener, after being put into a remote-control mode via the bus (see Table 3-15) and addressed to listen to device-dependent command strings. Refer to Table 3-17. The programming command set includes all of the keyboard functions except switching external bias ON OFF and full recalibration, which are not remotely programmable. Keyboard functions are...

For 1889M

1689-9603 (tweezers, with integral cable connected directly to instrument) 1689-9602 (BNC cable, with 1689-9600 or 1689-9605 remote test fixture) 1657-9600 (with 1689-9602 BNC cable at instrument and 1689-9600 9605 fixture, has remote banana plugs) 1688-9600 (with 1689-9602 BNC cable at instrument and 1689-9600 9605 fixture, has remote 874 connectors) * The formulas for Acm and Acmx contain x, which is 2(pi)fLc, where pi is 3.1416, where f is expressed in Hz, and inductance Lc is tabulated...

For C in nF R is in kilohms For C in uF R is in ohms

The decimal point is automatically positioned for maximum resolution (i.e., so that the first significant digit or the first zero after the decimal point is in the first position in the display) with a few exceptions, as listed below. Of course, displays on low underrange or low extension of a held range may have a number of necessary zeros to right of the decimal point (and therefore reduced number of significant digits compared to the display area) because uni and...

LQ CD yr CRQ D or R is positive Q D or R is negative see below

If the secondary measurement is negative --Q, D, or R as calculated by the Digibridge when selected parameter is L Q, C D, or C R --then there are t,.o likely possibilities. If the Q or D value (whichever is being displayed) is very sma.ll, a small (acceptable) calibration and or measurement error can lead to a negative result. (It should of course fall within the specified accuracy of the instrument.) Measurement error can be reduced by choice of measurement conditions, averaging, etc. Another...

Me a s Test Freq kHiTest Freq kiii

Rate .i 1 JO 3 00 .i i 10 100 Max115 42 36 35 1 23 50 44 43 ms FAST 124 79 72 71 132 87 80 79 ms IvfD 133 205 189 185 141 213 197 193ms SLQV 958 960 950 9 15 965 968 958 923ms Di splay BIN DiapUy VALUE Test Freq (kHi) Test Freq (kHz) kHz 0 1 I 10 100 0.1 1 10 10 H*Ma L 8 5 19 FAST 19 4 8S IVEC 233 2L& SLOW 1078 972 37 35 193 57 73 71 202 94 J 90 I 85 241 223 951 915 1086 980 4 5 43 ms 81 79 ms 1& 8 rJSros 959 923ms FOR DIGIBRIDGE WITHOUT HI 1-SPEED K ASUREN-EVT OPTION

Measure Mode Gout i nuous

Meas Test Freq (kHl) Test Freq (kHs) Kst( 0.1 1 10 100 0.1 10 100 FAST 159 111 107 106 167 122 115 114ms NED 168 340 224 220 1 76 248 233 228ms SiaV 993 905 985 950 1001 1003 093 958ms No entry for delay, When measure mode is CONTINUOUS p settling time is zero. No entry for d e y . hen measure mode is TRIGGERED, settling time is T, 10, 12 ms f defaults for measure rate FAST, XfD1, SL M , respect ive I y Trvli e r e 1 test freq in kila. Any programmed delay (can be 0 to 99999 nts) would replace...

Note

For a DUT with very short leads, it is important to orient each adaptor so that its internal contacts (which are off center) are clooe to the DUT. To remove each adaptor, lift with a gentle tilt left or right (never forward or back). Figure 3-2. Use of the adaptors (supplied) for connection of an axial-lead DUT to the Digibridge test fixture. Figure 3-2. Use of the adaptors (supplied) for connection of an axial-lead DUT to the Digibridge test fixture. Figure 3-3. Remote test fixture...

PQK 168 Sm Di Gibft Idge Withcut High Spefd JvEvsuret Option

Subtract about 1.7 ms from Max Meas Rats entries in corresponding 16S9 lablt, above . Subtract about 31 ms from other Me as Rati entries ill corresponding 1689 table above , NOTE Table 3-4 differs slightly from the table of typical measurement times given in the Specifications at the front of this manual (and data in paragraphs 3.5.1,3.5.2,3.5.5), although the tables are reasonab y accurate. The differences underscore that these typical numbers are not specifications and that several test...

Principal Measurement Results

The principal Digibridge measurement will be presented on the left (RLC) part of the display panel in one of four ways VALUE, deltaRLC, delta , or BIN No., (only one way for any single measurement). VALUE, Selected by the DISPLA Y Key. This measurement provides two displays the principal one is RLC (resistance, inductance, or capacitance) and the secondary one is QDR (quality factor with R or 1, either dissipation factor or resistance with C). The VALUE selection is the power-up default and one...

R 625 ohms to 256 ki1 ohm L 1f mH to 4100f nH C 64f nF to 25f uF

General view of the tradeoffs between measurement time and accuracy. Each curve shows the tradeoff for one test frequency. Operating points are labeled according to the selected measure rate (FAST, MEDIUM, SLOW). All of these curves apply to the following conditions R, L, or C within basic ranges, D < < 1 or Q> > 1, display is BIN NO., test voltage > 1.0 V, constant voltage NOT selected, delay NOT programmed, measure mode is TRIGGERED, and the high-speed option is used...

Theory Series and Parallel Parameters Figure

An impedance that is neither pure reactance nor a pure resistance can be represented at any specific frequency by either a series or a parallel combination of resistance and reactance. The values of resistance and reactance used in the equivalent circuit depend on whether a series or parallel combination is used. Keeping this concept in mind will be valuable in operation of the instrument and interpreting its measurements. The equivalent circuits are shown in the accompanying figure, together...

[5 H [shift [special [3

Table 3-9 (continued) SPECIAL FUNCTIONS Blanking a digits from RLC display and b digits from QDR display 5. Integra- Multiplies integration time by tion-Time factor f (0.25 to 6), normally 1 Factor Reducing f decreases accuracy and reduces measurement time. Increasing f does the converse. 6. Ra t i o No rma 1 displays Displays Ratio displayed (RLC only) nominal meas value 7. Man auto Manual selection of parameter Parameter Automatic selection of parameter Selection (R Q, L Q, or C D) default...

Ocmmnds Used In Programming Via Ieee488

MESSAGE ACTIVITY ON IEEE-488 BUS DURING A SIMPLE EXAMPLE OF REMDTE CONTROL By t e Me s s a g e * ATN Conine n t order line 1 (UNT) true Untalk all devices. 2 (UNL) true Unlisten all devices. 3** (MLA 3) true Set Digibridge (address 3) to listen. 4 (MEA n) true Set controller (address n) to talk. 5 G false Typical device-dependent message START. (See 6 0 false Table 3-17 for program conmands . ) 7 (UNL) true Unlisten Digibridge (must for measurement). Digibridge makes measurement, asserts SRQ...

Or

1 recommended IEEE-488 handler interface option retrofit 1658-9620 1 recommended Rack mount kit. (Digibridge front panel is always 1689-9611 accessible the BNC connectors for cable to test fixture can be mounted on either front or rear pan e I .) 1 recommended Remote test fixture (like the 1689-9600) also has 1689-9605 START bar, GO NO-GO I ights, which function only if Digibridge has an interface option. Use cables 1689-9602 (supplied with 1689M) and 1689-2400 (included with this fixture). 1...

Truth Table Of OovPacied Binary Fofmvt For OmPut Data

Rlc Series Block Diagram

Name STAHJS RLC, e RLC, mant i s sa QPR, e QDR, mantissa OIHER Byte Number byte 1 byte 2 byte 3 byte 4 byte 5 byte 6 byte 7 byte 8 76543210 Normal meas'mt 00 II I Overrange 101 Underrange 10 Inva1id meas' 111 Range 1 00 Range 2 j 01 j j j j j Range 3 j 10 j j j j j Range 4 11 Bin number 001 QDR amp bin no. j 011 j j j j j RLC amp bin no. j 101 j j j j RLC, C2PR, bin j 111 j j j j j RLC value is 0 RLC value i s - 11 gt R value is j j j 0 j j OPR va1ue i s - 11 Parameter L Q III 00 Parameter C D...

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...

Genrad Qualtech Iet Digibridge Service Manual

IEEE-488 handler interface option retrofit plug-in . 1 recornnended Tweezers, for handl ing and measuring chip components with terminals on opposite aces. BNC connectors 127-cm 50-inch cable. Use with adaptor 1689-9601. 1 recornnended Kelvin CI ip Cable, or measuring large, low impedance components. Use with adaptor 1689-9601. 1 recornnended Extender cable for connection to parts handler, large or remote DOT, custom test fixture, etc. Length 100 cm 40 in . One end fits test fixture of...

Specifications

Measurement results may be displayed in four ways as selected by the keyboard 1 VALUE, 2 difference, 3 RLC difference, and 4 BIN NO. 1 The VALUE display can be one of four pairs of measured quantities Land Q, C and D, C and R, or Rand Q. The primary display L, C, or R has five digi of resolution and the secondary display D, Q, or R with C has four digits of resolution. 2 The difference display indicates the percent deviation of the measured L, C, or R value from a stored NOMINAL VALUE. The sign...

Instruction Manual Changes

These supplementary pages contain information of improvements or modifications not documented in the current manual. All references to GenRad in the manual now apply to QuadTech, Inc. Page v - Table of Contents Parts Lists and Diagrams - Section 6 Power supply assembly, board layout and schematic pages 6-15 amp 6-16 replaced by Power supply assembly part number 700011. Page xii - Specifications High-Speed Measurement Interface Option, Environment Power amp Mechanical Part Number for High-Speed...

Instruction Manual

C QuadTech, Inc., 1992 5 Clock Tower Place, 210 East Maynard, Massachusetts, U.S.A. 01754 March, 2000 Telephone 978-461-2100 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 error or for consequential damages that may result from the misinterpretation of any procedures in this publication.