Tektronix TAS 200 User manual

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

Bench Test Instruments and Handheld Oscilloscopes Basic Service i
Table of Contents
TAS 200 Series Oscilloscopes 1................................
TAS 200 Series Specifications 3................................
TAS 200 Series Performance Verification 7......................
Test Equipment 8..................................................
Set Up 9.........................................................
Vertical Check 10..................................................
Horizontal Check 15................................................
Trigger Check 17...................................................
Cursor Check 19...................................................
TAS 200 Series Adjustment Procedures 21.......................
List of Adjustments 21..............................................
Test Equipment 23..................................................
Preparation for Adjustment 24........................................
Power Supply Adjustments 27........................................
Vertical Adjustments 30.............................................
Horizontal Adjustments 37...........................................
Trigger Adjustments 40..............................................
Probe Compensation 42..............................................
Cursors and Readout Adjustments 43...................................

Table of Contents
ii Bench Test Instruments and Handheld Oscilloscopes Basic Service

Bench Test Instruments and Handheld Oscilloscopes Basic Service 1
TAS 200 Series Oscilloscopes
The Tektronix TAS 220 and TAS 250 oscilloscopes are dual-channel products
withfrequencybandwidthsofDCto20MHzandDCto50MHzrespectively.
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:
HHigh beam transmission and high intensity CRT displays for clear
waveforms at high sweep speeds.
HHigh stability low-drift temperature compensation circuits to reduce baseline
and DC balance drift.
HTrigger feature, Set to 50% that eliminates triggering adjustments when
displaying regular, video, and large duty-cycle-ratio signals.
HSynchronization separator and trigger circuitry that permits the display of
TV signals. (You can automatically select vertical and horizontal signals
with the SEC/DIV control.)
HAutomatic focus (following an initial intensity adjustment).
Figure 1: TAS 220 oscilloscope

TAS 200 Series Oscilloscopes
2Bench Test Instruments and Handheld Oscilloscopes Basic Service

Bench Test Instruments and Handheld Oscilloscopes Basic Service 3
TAS 200 Series Specifications
The characteristics listed in this section apply under the following conditions:
HThe instrument operates in a 0°to 40°C ambient environment unless
otherwise noted.
HThe instrument warms up for at least 20 minutes.
HThe instrument is adjusted at an ambient temperature between
20°and 30°C.
NOTE. All specifications are warranted unless marked “typical.” Typical
characteristics are not guaranteed but are provided for the convenience of the
user.
NOTE. Input limits apply to signals with frequencies less than 1 kHz.
Table 1: Vertical deflection characteristics
Characteristic TAS 220 description TAS 250 description
Frequency Bandwidth (--3 dB) DC to 20 MHz
(5 mV/div to 5 V/div at 5°to 35°C)
DC to 50 MHz
(at 0°to 10°C and 35 to 40°C)
DC to 15 MHz DC to 40 MHz
(at 0°to 5°C and 35°to 40°C)
DC to 10 MHz
(1mV/div to 2 mV/div)
DC to 15 MHz
Vertical Gain (15°to 35°C) 5mV/divto5V/div: ±3%
1mV/divto2mV/div: ±5%
Variable Gain (Typical) To 1/2.5 or less of the readout indicated value.
Common Mode Rejection Ratio (Typical) 50 kHz: >50:1
10 MHz: >10:1
Input Impedance (Typical) 1MΩ,30pF
Vertical Linearity (Typical) ±0.1 division or less of amplitude change when a waveform of two divisions at
graticule center is moved vertically.
DC Balance Shift (Typical) 5mV/divto5V/div: ±0.5 divisions
1mV/divto2mV/div: ±2.0 divisions

TAS 200 Series Specifications
4Bench Test Instruments and Handheld Oscilloscopes Basic Service
Table 1: Vertical deflection characteristics (cont.)
Characteristic TAS 250 descriptionTAS 220 description
Chopping Repetition Frequency (Typical) 250 kHz
Maximum Input Voltage 400 V (DC + peak AC)
Channel Isolation (Typical) 50 kHz: 1000:1
10 MHz: 100:1
20 MHz: 30:1 50 MHz: 30:1
CH 1 Signal Output (Typical) 100 mV/div open circuit
50 mV/div into 50 Ω
CH 2 INV Balance (Typical) ≤1 division balanced point variation
Table 2: Horizontal characteristics TAS 200 series
Characteristic Description
Standard Sweep Time Accuracy 15°to 35°C: ±3%
0°to 15°C and 35°to 40°C: ±4%
Magnified Sweep Time Accuracy 1s/div to 0.5 sec/div: ±5%
0.1to0.5s/div: ±8%
Sweep Linearity
Standard ±3%
X10 MAG ±5%
X10 MAG 0.1to0.5s/div: ±8%
Table 3: Readout characteristics TAS 200 series
Characteristic Description
Readout Resolution 1/25 div
Readout Accuracy ±3% + 1/25 div
Readout Modes ∆V, ∆T, 1/∆T

TAS 200 Series Specifications
Bench Test Instruments and Handheld Oscilloscopes Basic Service 5
Table 4: Trigger characteristics
Characteristic TAS 220 description TAS 250 performance description
Sensitivity
0.5 divisions (internal), 0.1 V (external) DC to 5 MHz DC to 10 MHz
1.5 divisions (internal), 0.2 V (external) 5to20MHz 10 to 50 MHz
2.0 divisions (internal), 0.2 V (external) Video Video
Input Impedance (Typical) 1MΩ,30pF
Maximum Input Signal 100 V (DC + peak AC)
Table 5: Typical Z-Axis characteristics TAS 200 series
Characteristic Description
Maximum Input Voltage 50 V (DC + peak AC)
Sensitivity 3V
p-p (Trace becomes brighter with negative input.)
Frequency Bandwidth DC to 5 MHz
Input Resistance 5kΩ
Table 6: Typical X-Y mode operation
Characteristic TAS 220 description TAS 250 description
Sensitivity Same as CH 1 vertical axis
Sensitivity Accuracy 5mVto5V/div: ±4%
1to2mV/div: ±6%
Frequency Bandwidth DC to 1 MHz DC to 2 MHz
X-Y Phase Difference ≤3°from DC to 50 kHz ≤3°from DC to 100 kHz
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 1kHz
Duty Ratio 50:50
Output Level 2V
p-p
Output Resistance 2kΩ

TAS 200 Series Specifications
6Bench Test Instruments and Handheld Oscilloscopes Basic Service
Table 8: Environmental characteristics
Characteristic Description
Temperature
Operating 0°to 40°C
Nonoperating -- 4 0 °to +70°C
Tested to MIL-T-28800D, paragraphs 4.5.5.1.3 and 4.5.5.1.4, except in 4.5.5.1.3 steps
4and5(0°C operating test) are performed ahead of step 2 (--40°C nonoperating
test). Equipment shall remain off upon return to room ambient during step 6.
Excessive condensation shall be removed before operating during step 7.
Altitude
Operating ≤4,570 meters (15,000 feet). Maximum operating temperature decreases 1°C per
300 m (1,000 feet) above 1,500 m (5,000 feet).
Nonoperating ≤15,250 meters (50,000 feet)
Relative Humidity
Operating 30°to 40°C, 90% relative humidity +0%, --5%
Nonoperating 30°to 60°C, 90% relative humidity +0%, --5%
Five cycles (120 hours) referenced to MIL-T-28800D paragraph 4.5.1.2.2 for type III,
class 5 instruments. Operating and nonoperating at 90%, +0%, --5% relative humidity.
Vibration (Operating) 15 minutes along each of three major axes at a total displacement of 0.015 inch
peak-to-peak (2.4 g at 55 Hz) with frequency varied from 10 Hz to 55 Hz to 10 Hz in
one minute sweeps. Hold for 10 minutes at 55 Hz in each of three major axes. All
major resonances must be above 55 Hz.
Shock (Operating and Nonoperating) 30 g, half-sine, 11 ms duration, three shocks per axis each direction, for a total of 18
shocks.
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
Dimensions 32.7 cm ×16.2 cm ×46.3 cm (12.9 inch ×6.38 inch ×18.2 inch)
Weight 7.0 kg (15.4 lbs)
Operating Voltages 100 V, 120 V, 220 V, 240 V,
10% variation from selector range permitted.
Line Frequency 50 or 60 Hz
Power Consumption 70 VA