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White Instruments 200 Manual

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5 January 2005
– This contact update page has been added to the
Acrobat document you have downloaded. Please disregard any contact
information printed within the document.
Our Mailing and Shipping Address:
White Instruments Div. C Van R, Inc.
1514 Ed Bluestein Blvd., Suite 201 (for U.S. Mail)
Austin, TX 78721 U.S.A.
Phone: 512-389-5358
Fax: 512-301-3932
Main Email Address: cvanr@whiteinstruments.com
World Wide Web Site: http://www.whiteinstruments.com/
Note: Repairs and packages should be shipped to Suite 202

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Summary of Contents for White Instruments 200

  • Page 1 Acrobat document you have downloaded. Please disregard any contact information printed within the document. Our Mailing and Shipping Address: White Instruments Div. C Van R, Inc. 1514 Ed Bluestein Blvd., Suite 201 (for U.S. Mail) Austin, TX 78721 U.S.A. Phone: 512-389-5358 Fax: 512-301-3932 Main Email Address: cvanr@whiteinstruments.com...

  • Page 2: Dear System 200 Owner

    System 200 Signal Analyzer simple and cybernetically human. We sincerely hope you will take the time to thoroughly read and digest this manual as you become familiar with the System 200. If you have any questions concerning its operation or specifications, please feel free to write me or call me any time.

  • Page 3: Table Of Contents

    Dear System 200 Owner:..........................1 IMPORTANT NOTICE - REGISTRATION OF SYSTEM 200 SIGNAL ANALYZERS:...... 1 UNPACKING:............................ 5 1.01 INBOUND INSPECTION AND DAMAGE CLAIMS: ............5 1.02 INCLUDED WITH YOUR SYSTEM 200 SIGNAL ANALYZER:......... 5 1.03 WARRANTY: ..........................5 POWER – CONNECTIONS AND SPECIFICATIONS:..............7 2.01...
  • Page 4 9.04 200-03-00 OPTION: ONE-SIXTH OCTAVE, TWO-POLE FILTER SET: ......21 9.05 OTHER FILTER SETS: ......................22 9.06 BANDWIDTH CHANGE KEY:....................22 9.07 FILTER CARDS, CODES AND JUMPERS:................22 9.07.01 FILTER CARDS......................22 9.07.02 BANDWIDTH CODE ....................22 9.07.03 DISPLAY POSITION CODES AND JUMPERS ............23 WEIGHTING..........................
  • Page 5 17.06.06 OTHER VERTICAL CURSOR INDICATIONS............61 17.07 MAKING T I’1F4SURElIENTS:..................62 17.07.01 GENERAL........................62 17.07.02 “ARMING” THE ANALYZER FOR A T MEASUREMENT ......... 62 17.07.03 MEASUREMENTS USING THE ANALYZER’S BUILT-IN PINK NOISE SOURCE 62 17.07.04 MEASUREMENTS USING AN OUTBOARD EXCITATION SOURCE... 64 17.08 DISPLAYING T MEASUREMENTS AND DECAY CURVES........

  • Page 6: Unpacking

    UNPACKING: 1.01 INBOUND INSPECTION AND DAMAGE CLAIMS: Your System 200 Signal Analyzer has been carefully packaged to avoid damage in shipment. If the unit has been damaged in shipment, SAVE ALL PACKING MATERIALS and file an IMMEDIATE claim with the carrier.
  • Page 7 2. DAMAGE IN SHIPMENT Our instruments are shipped with full insurance unless the buyer instructs otherwise under his self- insurance. Prompt inspection should be made upon delivery and any necessary claims made against the carrier. Damage received during shipment is the buyer’s responsibility.

  • Page 8: Power - Connections And Specifications

    POWER – CONNECTIONS AND SPECIFICATIONS: 2.01 IMPORTANT CAUTION BEFORE CONNECTING THE POWER CORD TO THE ANALYZER, CHECK THE MAINS VOLTAGE AND ADJUST THE POWER SELECTOR SWITCH LOCATED ON THE REAR PANEL TO THE APPROPRIATE VOLTAGE. 2.02 NOMINAL A.C. VOLTAGES AND POWER: 115 VAC at 50 or 60 Hz –...

  • Page 9: Input Connections

    Input Impedance: 800 Q, Nominal Transformer Isolated and Balanced. 3.01.02 MICROPHONE POWER The MICROPHONE INPUT CONNECTOR is equipped with 15 Volt microphone power. Condenser microphones drawing 1 milliamp or less current at 15 VDC can be powered directly from the System 200 Signal Analyzer Mainframe. Figure 3.01...

  • Page 10: Line Level Input Connector

    3.01.03 LINE LEVEL INPUT CONNECTOR TYPE: .25” 2-Conductor Phone Jack with Normal Leaf Tip: Circuit High or ”+” LINE LEVEL INPUT Ring: See OUTPUT CONNECTIONS (Section 4) Sleeve: Circuit Common Input Impedance: 10k ohms, Minimum Unbalanced, Singled-Ended Please refer to Figure 3.02 When a phone plug is inserted into the front panel LINE LEVEL INPUT CONNECTOR, the analyzer is switched from the dB/spl MODE to the dBm MODE.

  • Page 11: Output Connections

    OUTPUT CONNECTIONS: 4.01 FRONT PANEL CONNECTIONS 4.01.01 PINK NOISE OUTPUT CONNECTOR TYPE: .25” 2-Conductor Phone Jack Tip: Circuit High or ”+” Line Level Output O.175 V, Nominal 0 ohms, Nominal Ring: Circuit High or ”+” Microphone Level Output 0.010 V, Nominal 300 ohms, Nominal Sleeve: Circuit Common...

  • Page 12: Microphone Preamp Output

    4.02.07 MICROPHONE PREAMP OUTPUT TYPE: .25” 2-Conductor Phone Jack Location: Rear Panel LINE LEVEL INPUT JACK Tip: See INPUT CONNECTIONS (Section 3) Ring: Circuit High or ”+” 7.8 Volt, Nominal 0 ohms, Nominal Sleeve: Common...

  • Page 13: System Initialization

    6. MONITOR DISPLAY – Level 7. WEIGHTING – FLAT MODE If a input signal is being fed to the System 200 Mainframe through its rear panel LINE LEVEL INPUT CONNECTOR, a dummy plug must be inserted in the front panel LINE LEVEL INPUT CONNECTOR so that the dBm MODE will be selected.

  • Page 14: Initialization - The Db/Spl Mode

    5.03 INITIALIZATION – THE dB/spl MODE: The System 200 will INITIALIZE in the dB/spl MODE if a connector IS NOT inserted into the front panel LINE LEVEL INPUT JACK. INITIALIZATION parameters are as follows: 1. dB/spl MODE 2. BASE LINE LEVEL or Input Preamp Setting 70 dB/spl 3.

  • Page 15: Input Levels

    INPUT LEVELS: 6.01 CONTROL: Both microphone and LINE LEVEL INPUT levels are adjusted in 10 dB steps by the KEYS located on the 12-KEY KEYBOABD. The result of adjustment is the BASE LINE VALUE which is displayed on the POSITION DISPLAY.

  • Page 16: Dynamic Range (Processing)

    6.03 DYNAMIC RANGE (Processing): The System 200 Signal Analyzer processes a dynamic range window of 46.5 dB. Therefore... If the dBm BASE LINE VALUE is adjusted to -10 dBm, the processing dynamic range is between -10 dBm and +36.5 dBm (-10 + 46.5 = 36.5).

  • Page 17: Processing Modes

    The mode displayed is controlled by the AVERAGE/PEAK CHANGE KEY. The operation of this key is transient free since the System 200 is processing in both modes simultaneously. Both the PEAK MODE and AVERAGE MODE may be simultaneously displayed.

  • Page 18: Peak Mode

    7.03 PEAK MODE: The REAL TIME display in the PEAE MODE shows an almost instantaneous rise of the signal followed by a slow decay similar to many Peak Program Meters. The inten ded application of the PEAK MODE is program monitoring as opposed to acoustic analysis using PINK NOISE.

  • Page 19: Filters And Bandwidth

    FILTERS AND BANDWIDTH: 9.01 GENERAL: The System 200 Mainframe will accommodate a total of 13 Filter cards. These cards carry the ONE-THIRD OCTAVE, ONE-SIXTH OCTAVE, OCTAVE BAND, or custom filters currently available. The filter cards are coded with jumpers to tell the analyzer which filters they are. As a result, the cards need not be installed in any particular order as long as they are installed in the slots designated for filters.

  • Page 20: 200-01-00 Option: One-Third Octave/Octave Band, Three-Pole Filter

    9.02 200-01-00 OPTION: ONE-THIRD OCTAVE/OCTAVE BAND, THREE-POLE FILTER SET: 200-01-00 OPTION CHART 30 Three-Pole, One-Third Octave Filters (25 Hz thru 20 kHz, on I.S.O. centers) SWITCHABLE TO – 10 Three-Pole, Octave Band Filters (31.5 Hz thru 16 kHz, on I.S.O. centers) This is a set of 8 filter cards carrying 30 One-Third Octave, Three-Pole Filters from 25 Hz through 20 kHz on I.S.O.

  • Page 21: 200-02-00 Option: One-Sixth Octave, Two-Pole Filter Set

    9 through 13. This filter set has three cards in common with the 200-03-00, 1/6 Octave filter option. When converting the analyzer between the two available 1/6 Octave options, it is necessary to re- jumper all five cards in the right order so that the filters displayed will correspond with the front panel nomenclature.

  • Page 22: 200-03-00 Option: One-Sixth Octave, Two-Pole Filter Set

    These filter cards are coded to respond when the 1/6 MODE is selected. If ordered, they are factory installed in filter card slots 9 through 13. This filter set has three cards in common with the 200-02-00 One-Sixth Octave Filter option. When converting the analyzer between the two available One -Sixth Octave options, it is necessary to re-jumper all five cards in the right order so that the filters displayed will correspond with the front panel nomenclature, (See Section 9.07).

  • Page 23: Other Filter Sets

    The user will not have to wait for the filters to settle. To exit this mode repeat the above steps and the System 200 will toggle between 1/6, 1/3, and OCTAVE. 9.07 FILTER CARDS, CODES AND JUMPERS: 9.07.01...

  • Page 24: Display Position Codes And Jumpers

    One-Sixth Octave equalizers currently available from White Instruments. (See Figure 9.01). 60% or the 200-02-04, -05, -06 filter cards are common to both the 200- 02-00 and 200-03-00 One-Sixth Octave options. If the 200-02-00 One-Sixth Octave option was originally purchased, it is necessary only to purchase the 200-02-07 and 200-02-08 filter cards to convert the analyzer to the 200-02-00 option.

  • Page 25: Weighting

    WEIGHTING 10.01 GENERAL The System 200 Signal Analyzer Mainframe contains a built- in filter to ”A” weight a signal to meet A.N.S.I. specifications. Other weighting filters in addition to ”A” may be obtained from White Instruments as options. They are used, outboard, in series with the analyzer’s inputs.

  • Page 26: Level And Amplitude Displays

    LEVEL AND AMPLITUDE DISPLAYS 11.01 SPECTRUM DISPLAY The SPECTRUM DISPLAY is a matrix of high intensity LEDs 30 wide by 16 high (including over range). The purpose of this display is to indicate the amplitude of thirty separate FILTER CHANNELS simultaneously. Resolution and Dynamic Range: The user may assign one of three resolution values to each vertical light on the SPECTRUM DISPLAY by using the RESOLUTION CHANGE KEY.

  • Page 27: Position Display

    11.04 MONITOR DISPLAY: The MONITOR DISPLAY is a four digit, seven segment, LED indicator. It has many functions, most of which are associated with future options White Instruments will offer for the System 200 Signal Analyzer. 11.04.01 LEVEL MODE When in the LEVEL MODE, the MONITOR DISPLAY will indicate the BROADBAND LEVEL to the nearest 0.5 dB.

  • Page 28: Display Modes

    DISPLAY MODES 12.01 DISPLAY MODE CHANGE KEYS: Two keys labeled DISPLAY MODE change the displays on the Analyzer. They are... 1. REAL TIME | MEMORY | -- CHANGE KEY OTHER 2. AVERAGE | -- CHANGE KEY PEAK When these keys are operated, the appropriate LED indicator will light, indicating the DISPLAY MODE.
  • Page 29 12.04 OTHER The OTHER DISPLAY MODE is reserved for options which can either be included in the basic System 200 software or plug- in options. When the OTHER DISPLAY MODE is entered, one or more displays and keys are redefined.
  • Page 30 DISPLAY POSITION KEYS. 13.04 ACCUMULATE IN MEMORY(IES) – STOP ACCUMULATION: The System 200 Signal Analyzer can simultaneously accumulate signal maximums in two different memories in both AVERAGE and PEAK MODES. When an accumulation function is in progress a L.E.D. indicator located under the MEMORY CONTROL KEYBOARD is lit.
  • Page 31 The data will remain stored as of the moment the ACCUMULATE/STOP KEY was touched. 13.05 LOAD IN MEMORY In order to expedite delivery of the new System 200 Signal Analyzer, this function was omitted to allow further software development. This feature will be added at a later date by exchanging personality cards. Complete instructions will be included.
  • Page 32 14.01 200-16-00 Intelligent, Internal I/O Controller 14.01.01 LOAD MEMORY MODE OPERATING SUMMARY A user specified curve may be loaded into any of the EIGHT MEMORIES to a precision of 0.5 dB (dB-spl or dBm). An existing response in MEMORY may be modified. The user has control of all analyzer status parameters.
  • Page 33 The FILTER DISPLAY data stored in any of the EIGHT MEMORIES can be set to ”zero”. NOTE: This function does not effect analyzer status data stored in a MEMORY. 1. DISPLAY the MEMORY you wish to CLEAR. For this example MEMORY 1 will be used.
  • Page 34 The analyzer will reinitialize. A duplicate of MEMORY 1 is stored in MEMORY 8. IMPORTANT It is important for the user to exit the TRANSFER MEMORY MODE. Failure to do this might cause a MEMORY to be inadvertently modified. 14.01.04 DUAL DISPLAY, REAL TIME &...
  • Page 35 IMPORTANT It is important for the user to remember to exit the DUAL DISPLAY, REAL TIME & MEMORY(ies) MODE. Failure to do this might cause a memory to be inadvertently modified. While in this mode the user may display any MEMORY(ies) involved, either one, two or three at a time.
  • Page 36 Touch M2 (16-key) ≥≤ ≥≤ 3. EXECUTE the ACCUMULATE A REFERENCE FUNCTION. A. Touch ACCUM (16-Key) The ACCUMULATE INDICATOR will light. In most cases two displays may be observed. ≥≤ ≥≤ 4. EXIT the ACCUMULATE A REFERENCE MODE. A. Touch SHIFT (16-key) B.
  • Page 37 A. Touch SHIFT (12-key) ≤ ≤ B. Touch M (16-key) For the INSIDE WINDOW MODE ≥ ≥ Touch M (16-key) For the OUTSIDE WINDOW MODE C. Touch WINDOW (16-Key) 3. DEFINE MEMORY parameters. A. Address the ”Lower Window Limit” MEMORY Touch M1 (16-key) B.
  • Page 38 OPERATING SUMMARY W A R N I N G The 200-17-00 FUNCTION GENERATOR can produce band limited signals as low as 25 Hz and as high as 20 kHz. Be certain your sound system gain is UNDER CONTROL before using the FUNCTION GENERATOR to prevent damage to the sound system.
  • Page 39 2. IDENTIFY THE SIGNAL MODE Before the VERTICAL CURSOR is brought out the code for the signal being generated will be displayed on the MONITOR DISPLAY. (see GENERAL) NOTE: If the VERTICAL CURSOR is out when the FUNCTION GENERATOR is turned on the identification code will not appear on the MONITOR DISPLAY.

  • Page 40: Oscilloscope And Plotter Features

    15 OSCILLOSCOPE AND PLOTTER FEATURES 15.01 GENERAL The System 200 Signal Analyzer is equipped with a SYNC SIGNAL to trigger an externally triggered oscilloscope, as well as necessary circuitry to drive an X – Y plotter. WARNING DO NOT ENTER THE OSCILLOSCOPE MODE WHEN A PLOTTER IS CONNECTED UNLESS YOUR PLOTTER IS SET TO STAND- BY, AND YOUR PLOTTER’S PEN IS SET...

  • Page 41: Plotter Hook-Up

    15. 02 PLOTTER HOOK-UP Please refer to Picture 15.1 Prepare a set of leads of suitable length. One end of the set should have connectors suitable to connect to your plotter. The other end may be bare wire or crimp -on #6 barrier lugs for connection to the analyzer.

  • Page 43: Oscilloscope Hook-Up

    3. COMMON 4. SYNC The oscilloscope and plotter may, however, be connected to the System 200 at the same time, but their use may not be simultaneous. In the case of a dual trace oscilloscope, both PEAK and AVERAGE data may be viewed simultaneously.

  • Page 44: Plot Function

    15. 04 PLOT FUNCTION: 15. 04. 01 GENERAL The contents of any of the MEMORIES may be plotted on an X – Y plotter in either PEAK or AVERAGE MODE. The PEAK/AVERAGE CHANGE KEY selection has nothing to do with which mode is plotted. PEAK MODE amplitude data is available at the PEAK TERMINAL on the analyzer’s back panel.
  • Page 45 Touch Shift then Plot/Display The analyzer will send the data from the ADDRESSED MEMORY to the plotter. See Figure 15.4...
  • Page 46 When the analyzer is sending information to the plotter ”p-p-p” appears in both the MONITOR and POSITION DISPLAYS. During this time, the analyzer will not recognize any commands from its keys. If the user wishes to abort the PLOT FUNCTION , he must turn the power to the analyzer off with the POWER SWITCH.

  • Page 47: Oscilloscope Mode: Warning

    15.05 OSCILLOSCOPE MODE: WARNING DO NOT ENTER THE OSCILLOSCOPE MODE WHEN A PLOTTER IS CONNECTED UNLESS YOUR PLOTTER IS SET TO STAND- BY AND YOUR PLOTTER’S PEN IS SET TO LIFT. TO DO SO MAY DAMAGE THE PEN AS THE OSCILLOSCOPE SWEEP SENT BY THE ANALYZER IS ORDERS OF MAGNITUDE FASTER THAN THE SIGNAL INTENDED FOR THE PLOTTER.

  • Page 48: Cursors

    CURSORS 16.01 GENERAL: The System 200 Signal Analyzer has two cursors... 1. VERTICAL CURSOR 2. HORIZONTAL CURSOR The cursor is either a column or row of lights which is manipulated from the MEMORY CONTROL KEYBOARD. 16.02 VERTICAL CURSOR: The purpose of the VERTICAL CURSOR is to point to a FILTER CHANNEL or the BROADBAND COLUMN.

  • Page 49: System 200 T 60 Measurements - Operating Summary

    2.1.1 Feed noise from System 200 to room sound system. Noise will be gated of f automatically when measurement is made. 2.1.2 Set noise level in room and PREAMP GAIN of System 200 so that: 2.1.2.1 System 200 DISPLAY is driven solidly to ROW 15 to assure START TIME THRESHOLD is exceeded.
  • Page 50 Measurement may be repeated. The System 200 will compute average T based on previous measurements. Up to 16 measurements may be averaged. The System 200 will reset the MONITOR DISPLAY when the CURSOR is shifted to a new filter. 4. TO EXIT T...

  • Page 51: Introduction

    This setup requirement is mandatory to ensure that the data taken reflects the characteristics of the environment under test. Extreme care should be taken when arming the System 200 in the ”T ”...
  • Page 52 2. A T extrapolation based on the first 30 dB of decay. The actual time in seconds the signal takes to decay 30 dB is measured. is then extrapolated as follows... = TIME where... TIME is the actual time it took the signal to pass between the START and STOP TIME THRESHOLDS.
  • Page 53 The T program uses the RAM locations of MEMORIES 5 through 8 as a ”scratch pad” when the unit is not fitted with the 200–16-00 INTELLIGENT, INTERNAL I/O CONTROLLER. Therefore, data in these memories will be destroyed the moment the T...

  • Page 54: Start Time Threshold

    If, during the course of measurement, the ambient noise level momentarily exceeds the STOP TIME THRESHOLD, the System 200 will indicate probable error in the measurement by causing its CURSOR to flash. The flashing CURSOR indicates that the second 15 dB of decay was at least twice as long as the first dB of decay and thus is likely to be in error.
  • Page 55 START TIME THRESHOLD, but from the wrong direction. The program recognizes this and waits for the signal to decay back through the START TIME THRESHOLD before starting the measurement. After the signal passes the STOP TIME THRESHOLD the System 200 calculates the T time selected by the FRONT PANEL switch setting and displays it on the Monitor Display.
  • Page 56 LIMITED NOISE permits a higher level ”in band” signal to be induced into the room. When a gun, balloon or similar device is being used for excitation, the System 200’s ACCUMULATE NODE is helpful in setting the START TIME THRESHOLD.

  • Page 57: T 60 Mode - Selection

    1. Establish the appropriate START TIME THRESHOLD. 2. Select the desired FILTER SET. If the unit contains the optional 200-17-00 FUNCTION GENERATOR the NOISE SOURCE to be used must also be selected. (Band Limited Noise, Sine, Square, Triangle, Pink, White) Default will be to the current state of the analyzer.
  • Page 58 5. The STATUS INDICATOR for the MONITOR DISPLAY will indicate TIME. 6. The DISPLAY MODE INDICATOR will indicate OTHER. 7. The STATUS INDICATOR for the RESOLUTION CHANGE KEY will indicate 2 dB, thus selecting the T time based on the 30 dB time of decay. This may be changed by the user while in the T NODE.

  • Page 59: Tmode 60 Mode - Vertmodeical Cursor

    4. It indicates the possibility of an error caused by outside noises during a measurement. 5. It follows the signal in REAL TIME by showing the signal’s rise and decay. 6. It selects the center frequency of the optional 200-17-00 FUNCTION GENERATOR, when installed in the System 200.

  • Page 60: Manipulation - Vertical Cursor

    17.06.02 MANIPULATION – VERTICAL CURSOR The VERTICAL CURSOR is moved in the T MODE the same way it is moved in the REAL TIME or MEMORY MODES. KEYS located on the 16 KEY KEYBOARD move the CURSOR to the LEFT and RIGHT on the FILTER DISPLAY respectively.

  • Page 61: Resetting The Analyzer To Take A New Set Of Averages Of T 60 Measurements

    12 KEY KEYBOARD 17.06.03 RESETTING THE ANALYZER TO TAKE A NEW SET OF AVERAGES OF T MEASUREMENTS. When, for any reason, the VERTICAL CURSOR is moved the registers containing the T measurements and/or averages of multiple T measurements are reset to zero. This feature facilitates, for example, the ”sweeping”...

  • Page 62: Error Possibility - Flashing Vertical Cursor

    1 dB resolution LED is the correct time of decay. Lowering the PREAMP gain 1 step (10 dB) will often allow the System 200 to make the measurement, especially if a 30 dB/spl baseline was selected. However, the signal level must still light the 15th row of LEDs in order to pass the START TINE THRESHOLD.

  • Page 63: Making T I'1F4Surelients

    The noise is enabled by pressing DISP, GEN on the 12 Key Keyboard. If the Model 200 does not contain a FUNCTION GENERATOR then PINK NOISE is continuously sent to the sound system.
  • Page 64 The user may continue to make successive measurements as above until a maximum of 16 is reached or he may move the VERTICAL CURSOR to another FILTER and begin again. Consider the above illustration. A room is excited with the continuous PINK NOISE. Approximately 100 dB/spl is measured in the BROADBAND COLUMN which is looking at a bandwidth of approximately 20 kHz (25 Hz through 20 kHz) .

  • Page 65: Source

    17.07.04 MEASUREMENTS USING AN OUTBOARD EXCITATION SOURCE These sources include. 1. Pistol or cannon shots. 2. Balloons 3. Clap Boards The user must control these sources to have the excitation signal decay through the START TIME THRESHOLD. Aside from frequency response and repeatability considerations the signal must have enough energy to begin decaying from an amplitude ABOVE the selected START TIME THRESHOLD.

  • Page 66: Displaying Tmeasurements And Decay Curves

    A chart of SMOOTHING TIME CONSTANTS for the entire spectrum is shown in section 17.10 for comparison to actual measured SMOOTHING TIME CONSTANTS. The System 200 measures time to a 1ms resolution and amplitude to a 0.5 dB resolution. This fine resolution is often confusing due to the variation between measurements. It is suggested that at least 5 measurements should be made to form a close approximate average.

  • Page 67: Storage Oscilloscope

    Mode normally selected for measurement. Should the ”Peak” mode be used then the RECORDER INPUT must be changed to the PEAK back panel output of the System 200. If the chart speed is known and the vertical scale is calibrated, the 30 dB decay curve can accurately be recorded and the slope measured.

  • Page 68: Exitheing Thehe The 60 Tnode

    17.09 EXITING THE T NODE: The T NODE may be exited at any time as follows Touch the DISPLAY MODE CHANGE KEY. The T MODE will be exited to either the REAL TIME MODE or the MEMORY MODE depending upon which mode the analyzer was in before the T MODE was entered.

  • Page 69: Effects Of The Analyzer ' S Filters, Smoothing Time Constants And Peak/Average Modes On T 60 Measurements

    17. 10 EFFECTS OF THE ANALYZER ’ s FILTERS, SMOOTHING TIME CONSTANTS AND PEAK/AVERAGE MODES ON T MEASUREMENTS: In the System 200 Signal Analyzer the delay times of the filters are less than the smoothing times of the rectifier/smoothing networks following them. Therefore, the delay of the filters, themselves, may be ignored,.
  • Page 70 Six different combinations of smoothing time and peak or average responses are provided by the System 200 Signal Analyzer and can be used for this purpose. However, the average, fast mode of operation has proven to be the best in capturing accurate T...

  • Page 78: Service Notes

    SERVICE NOTES 18. 00 Manual Revisions and Additions 11/30/00 Create Word2000 and PDF of Manual from last revisions.

  • Page 79: Retrofit Procedures

    18. 01 Retrofit Procedures 18.01.02 Assembly Instructions...

  • Page 86: Performance Tests

    18.02 Performance Tests 18.02.01 Checkout Procedure...

  • Page 89: Calibration

    18.03 Calibration 18.03.01 Filter Board Calibration Procedure...

  • Page 90: Documentation

    18.04 Documentation 18.04.03 Wiring Diagrams & Connection Tables 18.04.03.12 Calibration Pot Location...

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