Operating Instructions—4 5 5 /A 2/B 2
BASIC APPLICATIO NS AND M EA SU R EM EN TS
Peak-to-Peak Amplitude Measurements
To measure the amplitude o f a signal, m ultiply the vertical
deflection (in divisions) by the V O LT S /D IV Switch setting.
Example:
The display amplitude is 3 divisions (see Fig. 2-5) and the
V O LT S /D IV switch is set to .5 V. Substituting the given
values:
Am plitude = 3 divisions x 0.5 volts/division =
1.5 V peak-to-peak.
Instantaneous Amplitude Measurement
The follow ing procedure explains how to measure the
amplitude o f any p oint on a waveform w ith respect to
ground.
1. Set the AC-GND-DC switch to DC.
2. A pply the signal to be measured to one of the vertical
input connectors. Set the VERT MODE switch to select
the channel used.
3. Obtain a stable display, centered vertically.
4. Set the AC-GND-DC switch to GND. Adjust the trace to
some reference line (see Fig. 2-6).
5. Set the AC-GND-DC switch to DC. If the waveform
appears above the reference line, the voltage is positive. If
the waveform appears below the reference line, the voltage
is negative.
6. Measure the vertical difference (in divisions) between the
reference line and the desired p oint on the waveform and
m ultiply by the volts/div switch setting.
Example:
The vertical difference is 5 divisions (see Fig. 2-6). The
V O LT S /D IV switch is set to 10 mV. The waveform appears
above the reference line.
Substituting the given values:
Instantaneous Am plitude = 5 divisions x 10 m V/division =
50 m V
Instantaneous Am plitude = +50 mV.
Dual Trace Phase Difference Measurement
Phase comparison between tw o signals o f the same frequency
can be made using the dual-trace feature. This method o f
phase difference measurement can be used up to the fre
quency lim it of the vertical system. It is also more accurate
and easier to use than the X-Y method. To make the com
parison, use the follow ing procedure:
1. Set the AC-GND-DC switches to AC.
V E R T IC A L
D E F L E C T IO N
1
1907-27
Fig. 2-5. Peak-to-peak voltage measurement.
Fig. 2-6. Instantaneous voltage measurement.
Summary of Contents for 455
Page 1: ...Tektronix 455 A2 B2 PORTABLE OSCILLOSCOPE WITH OPTIONS I N S T R U C T I O N M A N U A L ...
Page 9: ......
Page 13: ...455 A2 B2 x 455 A2 B2 Portable Oscilloscope ...
Page 61: ...Circuit Description 455 A2 B2 Fig 4 4 Channel switching gates REV A OCT 1975 4 9 ...
Page 66: ...Fig 4 6 Sweep generator 1C Function block diagram Circuit Description 455 A2 B2 ...
Page 80: ...Maintenance 455 A2 B2 BOTTOM FRAME Fig 5 7 VO LTS DIV switch disassembly 5 8 REV A OCT 1975 ...
Page 90: ...Maintenance 455 A2 B2 Fig 5 13 Troubleshooting chart 5 18 REV A O CT 1975 ...
Page 91: ...Maintenance 455 A2 B2 1907 1 A Fig 5 13 Troubleshooting chart cont REV A OCT 1975 5 19 ...
Page 132: ...Instrument Options 455 A2 B2 Option 7 Page 8 REV E AUG 1979 D C TO AC I NVERTER ...
Page 166: ...l 07 7 REV b NOV C M1 4 5 5 MAIN MODULE BLOCK DIAGRAM ...
Page 167: ...4 5 5 A 2 B 2 AS VERTICAL MODULE IR07 R8 RE V B M O ...
Page 168: ...I S 0 7 9 8 R E V B NOV IRT7 A2 VERTICAL MODULE BLOCK DIAGRAM ...
Page 169: ...REV B NOV 1977 Fig 9 2 A1 Partial Interface board compo ...
Page 170: ...455 A2 B2 Sea Parts List for serial number ranges tial Interface board component locations ...
Page 173: ...v I m B 2 HORIZONTAL MODULE BLOCK DIAGRAM ...
Page 174: ...455 A2 B2 REV B NOV 1977 Fig 9 3 A 1 Partial Interface board component locations ...
Page 182: ...455 A2 B2 Fig 9 4 A20 Vertical board component locations SN B0110 ...
Page 185: ...455 A2 S2 4 5 5 M A fN M O DULE ...
Page 187: ...455 A2 B2 Fig 9 5 A20 Vertical board component location SN B010100 B REV C NOV 1977 ...
Page 191: ...V O L T S 01 ...
Page 192: ...V O LT S Q IV S H O W N IN 57 H V ...
Page 198: ... U 1 X SlCjMAt TO P2 A4 h o p it MODULE SEE PARTS LIST FOR SEMICONDUCTOR TYPES f SWITCHING ...
Page 207: ...A 1 4 B T I M I N G S W I T C H B O A R D A13 A TIM ING SWITCH BOARD 1 9 0 7 3 ...
Page 209: ...4 5 5 A 2 B 2 B 2 h o r iz o n t a l m o d u l e R o i I 11 R E V C NOV IS77 ...
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Page 216: ...A B T IM IN G S W IT C H INTERFACE C O N N E C T O R ...
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Page 224: ...455 A 2 B 2 ...
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