ADJUSTMENTS
Section 6—455/A2/B2
IM PORTANT-PLEASE READ BEFORE USING THIS PROCEDURE
The purpose o f this procedure is to provide an adjustment sequence that w ill allow an operating instrument to be adjusted to
meet its original performance requirements; it is not intended as a troubleshooting guide. Any trouble which becomes appar
ent during the adjustment sequence should be corrected before proceeding. Refer to the Troubleshooting portion o f the
Maintenance section.
TOLERANCES
Limits and tolerances are instrument specifications only if
they are called out as performance requirements in the
Specification sections.
Tolerances given are fo r the oscilloscope under test and do
not include test equipment error.
ADJUSTM ENT IN TER A C TIO N
Some adjustments interact w ith others, these are identified
with an INTERACTION step.
PA R TIA L PROCEDURES
Partial adjustment is sometimes desirable after replacing
components or to touch up adjustments between major
recalibrations. Adjustments can be made to individual
circuits w itho ut having to perform the complete adjustment
procedure. However, do not change the setting of the +32 V
adjustment unless you intend to readjust the entire instrument.
To prevent unnecessary readjustment o f other parts o f the
instrument, reset an adjustment only if the tolerance given
fo r that step is not met. If it is necessary to reset an ad
justment, also check any steps listed in the INTERACTION-
part o f the step.
TEST EQUIPM ENT REQ UIRED
The test equipment listed in Table 6-1, or equivalent is re
quired for complete calibration o f the oscilloscope. Speci
fications given fo r the equipment are the minimum neces
sary for accurate calibration.
TABLE 6-1
Test Equipment Required fo r Adjustment Procedure
Description
Minimum Specifications
Usage
Example of Applicable
Test Equipment
1. Digital Voltmeter
Range, 0 to 32 V dc; dc voltage
accuracy, 0.1 %; display, 4
'k
digits.
Power supply adjustments.
Calibrator amplitude adjust
ment. Crt grid bias adjust
ment.
a. Tektronix DM501 Digital
M ultim eter.1
2. Time-Mark Generator
Marker outputs, 10 ns to 0.5s;
marker accuracy, w ithin 0.1%;
trigger output, 1 ms to 0.1
ns,
time coincident with markers.
Y-Axis alignment. Geometry
adjustment. A & B timing
adjustments.
a. Tektronix TG501 Time-Mark
Generator.1
b. Tektronix 2901 Time-Mark
Generator.
3. Am plitude Calibrator
Am plitude accuracy, within
0.25%; signal amplitude, 20 mV
to 2 V square wave; frequency,
1 kHz.
Vertical gain adjustment.
X gain adjustment. Trigger
view gain adjustment.
a. Tektronix PG506 Calibration
Generator.1
b. Tektronix 067-0502-01
Calibration Fixture.
Requires T M 500 Series Power Module.
REV. A, O C T 1975
6-1
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 ...
Page 213: ......
Page 214: ......
Page 216: ...A B T IM IN G S W IT C H INTERFACE C O N N E C T O R ...
Page 223: ... ...
Page 224: ...455 A 2 B 2 ...
Page 225: ... 455 A2 B2 ...
Page 226: ......
Page 233: ......
Page 234: ...455 A2 B2 ...