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Tektronix TAS 200 Series Instruction Manual

Oscilloscopes
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Instructions Manual
TAS 200 Series
Oscilloscopes
070-9855-01
www.tektronix.com

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Summary of Contents for Tektronix TAS 200 Series

  • Page 1 Instructions Manual TAS 200 Series Oscilloscopes 070-9855-01 www.tektronix.com...

  • Page 3: Table Of Contents

    ....... . TAS 200 Series Performance Verification ..... .
  • Page 4 Table of Contents Bench Test Instruments and Handheld Oscilloscopes Basic Service...

  • Page 5: Tas 200 Series Oscilloscopes

    Both oscilloscopes feature a maximum sensitivity of 1 mV/division and a maximum sweep speed of 10 ns/division. In addition, the TAS 200 series oscilloscopes offer the following features: H High beam transmission and high intensity CRT displays for clear waveforms at high sweep speeds.
  • Page 6 TAS 200 Series Oscilloscopes Bench Test Instruments and Handheld Oscilloscopes Basic Service...

  • Page 7: Tas 200 Series Specifications

    TAS 200 Series Specifications The characteristics listed in this section apply under the following conditions: H The instrument operates in a 0° to 40° C ambient environment unless otherwise noted. H The instrument warms up for at least 20 minutes.
  • Page 8 CH 1 Signal Output (Typical) 100 mV/div open circuit 50 mV/div into 50 Ω ≤1 division balanced point variation CH 2 INV Balance (Typical) Table 2: Horizontal characteristics TAS 200 series Characteristic Description ±3% Standard Sweep Time Accuracy 15° to 35° C: 0°...
  • Page 9 DC to 2 MHz ≤3° from DC to 50 kHz ≤3° from DC to 100 kHz X-Y Phase Difference EXT HOR Sensitivity 0.1 V/div Table 7: Typical probe compensation signal characteristics TAS 200 series Characteristic Description Waveform Positive going square wave Frequency...
  • Page 10 Radiated and Conducted Emissions Meets EN55011, class A. Safety Listed CSA C22.2 No. 231 and UL1244 Table 9: Typical mechanical characteristics TAS 200 series Characteristic Description 32.7 cm × 16.2 cm × 46.3 cm (12.9 inch × 6.38 inch × 18.2 inch)

  • Page 11: Tas 200 Series Performance Verification

    2000 hours of operation if used infrequently. Table 11 lists the equipment needed to do the performance verification proce- dures. The TAS 200 series performance verification consists of the checks listed in Table 10. Table 10: Performance verification checks...

  • Page 12: Test Equipment

    DC voltage levels from 100 mV to 10 V 35 V, 4 A, ±0.1% Accuracy Digital Multimeter Tektronix DMM914 Digital Multimeter 50 Ω, female BNC input, male BNC output Tektronix 011-0049-01 Termination (two required) 75 Ω, male-to-male BNC connectors, Cable, Coaxial...

  • Page 13: Set Up

    TAS 200 Series Performance Verification Set Up Following a 20 minute warm-up period, preset the oscilloscope to the settings listed below. Table 12: Oscilloscope initial settings Control Setting INTENSITY Visible Display CURSOR ON/OFF VERTICAL POSITION Midrange MODE VOLTS/DIV 10 mV...

  • Page 14: Vertical Check

    To check DC gain accuracy, perform the following steps. 1. Use the 50 Ω precision coaxial cable to connect the standard amplitude output of the DC calibration generator to the TAS 200 series oscilloscope CH 1 (CH 2) input. See Figure 2 below.
  • Page 15 TAS 200 Series Performance Verification Table 13: DC gain and displayed signal accuracy TAS 200 volts/div scale Generator output Displayed signal accuracy 1 mV 5 mV 4.75 to 5.25 div 2 mV 10 mV 4.75 to 5.25 div 5 mV 20 mV 3.88 to 4.12 div...
  • Page 16 1. Use the 50 Ω precision coaxial cable to connect the output of the leveled sine wave generator to the 50 Ω termination; then connect the 50 Ω termination to the TAS 200 series oscilloscope CH 1 (CH 2) input. See Figure 3 below.
  • Page 17 TAS 200 Series Performance Verification NOTE. At lower VOLTS/DIV settings, you might need to set TRIGGER COU- PLING to HF REJ to minimize noise or double triggering. Table 14: DC coupled bandwidth Volts/Div 50 kHz Bandwidth TAS 220 TAS 250...
  • Page 18 2. Position the oscilloscope trace on the center horizontal graticule line using the CH 2 POSITION control. 3. Verify that there is minimal trace shift (<±1 divisions) on the TAS 200 series instrument when switching the CH 2 INVERT button in and out.

  • Page 19: Horizontal Check

    1. Use the 50 Ω precision coaxial cable to connect the output of the time mark generator to the 50 Ω termination; then connect the 50 Ω termination to the TAS 200 series instrument CH 1 input. See Figure 4 below. Time Mark Generator 50 Ω...
  • Page 20 TAS 200 Series Performance Verification Table 15: Standard time base accuracies HORIZONTAL Time marker Time mark to graticule accuracy SEC/DIV setting over center 8 divisions ±0.24 division .1 s 0.1 s ±0.24 division .2 s 0.2 s ±0.24 division .5 s 0.5 s...

  • Page 21: Trigger Check

    1. Use the 50 Ω precision coaxial cable to connect the output of the leveled sine wave generator to the 50 Ω termination; then connect the 50 Ω termination to the TAS 200 series instrument CH 1 input. See Figure 5 below.
  • Page 22 TAS 200 Series Performance Verification TRIGGER COUPLING TRIGGER SET TO 50% Out (release) 3. Set the leveled sine wave generator to produce a five-division output at the low-frequency trigger level listed for your instrument. See Table 17. Table 17: DC coupled triggering sensitivity...

  • Page 23: Cursor Check

    TAS 200 Series Performance Verification Cursor Check The following checks verify the cursor accuracy of your oscilloscope. ∆T Measurement To check cursor ∆T measurement accuracy, implement the following steps. Accuracy 1. Set up the oscilloscope as follows: VERTICAL MODE CH1 (CH2)
  • Page 24 TAS 200 Series Performance Verification 6. Position the O cursor 3 divisions below the display horizontal center with the CURSOR POSITION switch. 7. Verify that the ∆V readout at the top-left corner of the display, reads 1 (2) between 5.78 and 6.22 V.

  • Page 25: Tas 200 Series Adjustment Procedures

    The procedures in this section do not verify performance. To confirm that your oscilloscope meets factory specifications, implement the procedures in the TAS 200 Series Performance Verification section. List of Adjustments Use the adjustments listed in Table 18 to return TAS 220 and TAS 250 oscillo- scopes to factory calibration.
  • Page 26 TAS 200 Series Adjustment Procedures Table 18: TAS 220 and TAS 250 adjustments (cont.) Horizontal Adjustments X10 Magnification Registration Horizontal Position 1 ms Timing 1 s and .1 s Timing X-Gain Accuracy X-Axis Offset Trigger Adjustments Trigger DC Offset Trigger Slope Balance...

  • Page 27: Test Equipment

    DC voltage levels from 100 mV to 10 V 35 V, 4 A, ±0.1% Accuracy Digital Multimeter Tektronix DMM914 Digital Multimeter 50 Ω, female BNC input, male BNC output Tektronix 011-0049-01 Termination (two required) 75 Ω, male-to-male BNC connectors, Cable, Coaxial...

  • Page 28: Preparation For Adjustment

    TAS 200 Series Adjustment Procedures Preparation for Adjustment Perform the adjustment procedures on an as-needed basis. If an oscilloscope section fails a performance requirement, or if a section is replaced or repaired, adjust only that section. Adjusting individual sections of the oscilloscope rarely affects its overall performance.
  • Page 29 TAS 200 Series Adjustment Procedures Rear panel mounting screws (4) Rear panel Cover screws (2) Instrument cover Figure 6: TAS 220 and TAS 250 instrument cover removal Bench Test Instruments and Handheld Oscilloscopes Basic Service...
  • Page 30 TAS 200 Series Adjustment Procedures Initial Settings Following the warm-up period, preset the oscilloscope to the settings listed below. Table 20: Oscilloscope initial settings Control Setting INTENSITY Visible display CURSOR ON/OFF VERTICAL CH 1 (CH 2) POSITION Midrange MODE CH1 (CH2)

  • Page 31: Power Supply Adjustments

    TAS 200 Series Adjustment Procedures Power Supply Adjustments To locate the adjustments and test points for the following procedures, refer to Figure 7. The Power and High Voltage board occupies the bottom-left side of the instrument below the CRT. NOTE. The power supply section affects all other sections of the instrument. If you make repairs or adjustments that change the absolute value of any power supply voltage, you must complete the entire adjustment procedure.
  • Page 32 +145 (TAS 250) +145 +140 to +150 NOTE. If a power supply measurement exceeds the limits specified in Table 21, discontinue the adjustment procedures. Contact a Tektronix service center for instrument repair. 5. Disconnect the voltmeter from the instrument. Intensity Use the following procedure to adjust the display intensity.
  • Page 33 TAS 200 Series Adjustment Procedures 3. Rotate the front panel HORIZONTAL POSITION control to move the dot to the display center. Rotate the INTENSITY control to give the dot a sharp edge. 4. Adjust VR604 on the Power and High Voltage board and the oscilloscope front panel FOCUS control until the dot becomes circular.

  • Page 34: Vertical Adjustments

    TAS 200 Series Adjustment Procedures Vertical Adjustments To locate the adjustments for the following procedures, refer to Figures 8, 9, and 10. The Main board occupies the bottom-right side of the instrument. VR301 VR303 VR502 VR112 VR408 VR108 VR110 VR208...
  • Page 35 TAS 200 Series Adjustment Procedures DC Balance Use the following procedure to adjust the DC balance. 1. Set up the oscilloscope as follows: VERTICAL MODE CH1 (CH2) CH 1 (CH 2) VERTICAL VARIABLE CAL CH 1 (CH 2) GND 2. On the oscilloscope Main board, adjust VR101 (VR201) for a minimal trace shift when switching the front panel CH 1 (CH 2) VOLTS/DIV control between 5 mV and 10 mV.
  • Page 36 TAS 200 Series Adjustment Procedures 3. Set the CH 2 VERTICAL INVERT push switch to the in position and note the new trace location. 4. On the Main board, adjust VR213 to position the trace half way back to the center horizontal graticule line.
  • Page 37 TAS 200 Series Adjustment Procedures 4. Set the CH 2 VERTICAL INVERT push switch to the in position. 5. Set the VERTICAL MODE control to the ADD position. 6. Position the trace to the center horizontal graticule. 7. Adjust VR208 to obtain a flat line. See Figure 8 for the adjustment location.
  • Page 38 TAS 200 Series Adjustment Procedures VC301 3RD COMP VR302 Instrument front Figure 9: Power and High Voltage board (viewed from the instrument bottom) 7. Adjust VR107 (VR207) to optimize the waveform flatness. See Figure 8 for the adjustment locations. 8. Readjust VR103 (VR203) to reduce peak aberrations to less than 0.24 divi- sions while maintaining peak-to-peak aberrations less than 0.36 divisions.
  • Page 39 TAS 200 Series Adjustment Procedures Attenuator Compensation Use the following procedure to adjust the vertical input attenuator compensation. 1. Set up the oscilloscope as follows: VERTICAL MODE BOTH CH 1 (CH 2) VOLTS/DIV 0.1 V CH 1 (CH 2) VARIABLE CH 1 (CH 2) AC-DC 2.
  • Page 40 TAS 200 Series Adjustment Procedures 9. Connect the probe to the square wave generator and confirm that the output is a 1 kHz square wave. Adjust the generator output to produce a waveform five divisions in amplitude on the display. Adjust the probe compensation to flatten and optimize the waveform.

  • Page 41: Horizontal Adjustments

    TAS 200 Series Adjustment Procedures Horizontal Adjustments To locate the adjustments for the following procedures, refer to Figures 8 and 10. The Main board occupies the bottom-right side of the instrument. X10 MAG Registration Use the following procedure to adjust the X10 MAG registration.
  • Page 42 TAS 200 Series Adjustment Procedures HORIZONTAL SEC/DIV 1 ms SWEEP UNCAL 2. Connect the time mark generator to the CH 1 input with a 50 Ω coaxial cable and 50 Ω termination. 3. Set up the generator to produce a 1 ms output.
  • Page 43 TAS 200 Series Adjustment Procedures TRIGGER COUPLING TRIGGER SOURCE 2. Use a 50 Ω coaxial cable to connect the square wave generator to the CH 1 input. Set up the generator for a 1 kHz 50 mV output. 3. Adjust VR109 for exactly five divisions of horizontal deflection on the display.

  • Page 44: Trigger Adjustments

    TAS 200 Series Adjustment Procedures Trigger Adjustments To locate the adjustments for the following procedures, refer to Figures 8 and 10. The Main board occupies the bottom-right side of the instrument. Trigger DC Offset Use the following procedure to adjust the trigger DC offset.
  • Page 45 TAS 200 Series Adjustment Procedures TRIGGER SET TO 50% TRIGGER SLOPE Falling (push switch in) 2. Use a DMM to measure the collector voltage of Q414. Adjust VR403 for a reading of 1.40 V ±0.02 V. See Figure 10 for the adjustment location.

  • Page 46: Probe Compensation

    TAS 200 Series Adjustment Procedures Probe Compensation To locate the adjustment for the following procedure, refer to Figure 11. The Power and High Voltage board occupies the bottom-left side of the instrument below the CRT. ASTIG FREQ ADJ VR604 VR701...

  • Page 47: Cursors And Readout Adjustments

    TAS 200 Series Adjustment Procedures Cursors and Readout Adjustments To locate the adjustments for the following procedures, refer to Figure 13. The Control and I/O board occupies the top left-hand corner of the instrument. Cursor Accuracy Use the following procedure to adjust the cursor accuracy.
  • Page 48 TAS 200 Series Adjustment Procedures Y gain Y pos VRA03 VRA04 Drift VRA05 VRA01 X gain X pos VRA02 Instrument front Figure 13: Control and I/O board (viewed from the instrument top) Drift Use the following procedure to minimize the readout drift.

This manual is also suitable for:

Tas 250

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