Tektronix 221, Инструкция по эксплуатации

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CALIBRATION
Section 5 —221 Service
T E K T R O N IX FIE LD SERVICE
Tektronix, Inc. provides complete instrument repair and
recalibration at the Field Service Centers, and the Factory
Service Center. Contact your local Tektronix Field Office
or representative.
To assure instrument accuracy, check the calibration of
the 221 every 1000 hours of operation, or every six months
if used infrequently. Before calibrating the 221, thoroughly
clean and inspect the instrument; see the maintenance
section of this manual.
To aid in locating a step in this procedure, an index is
given before the complete procedure. Where possible, the
instrument performance is checked before an adjustment is
made. For best overall instrument performance, make each
adjustment to the exact setting even if the CHECK— step is
w ithin the allowable tolerance.
TEST EQUIPM ENT REQ UIRED
The following test equipment and accessories, or equiv­
alent, are required for the complete calibration of the 221
The given specifications for the test equipment are the
minimum necessary for accurate calibration. Therefore, the
specifications of any test equipment used must meet or
exceed the listed specifications. A ll the test equipment is
assumed to be correctly calibrated and operating w ithin the
listed specification. Detailed operating instructions for the
test equipment are not given in this procedure. Refer to the
instruction manual for the test equipment if more informa­
tion is needed.
Special Tektronix Calibration Fixtures are used in this
procedure only where they facilitate instrument calibration.
These calibration fixtures are available from Tektronix, Inc.
Order by part number through your local Tektronix Field
Office or representative.
Table 5-1
TEST E Q U IPM ENT R E Q U IR E D
Description Minimum Specifications Usage
Examples of Applicable
Test Equipment
1. Constant Amplitude
Signal Generator
50 kHz reference frequency;
maximum frequency 6 MHz;
variable amplitude. Check horizontal vertical and
trigger bandwidth
Tektronix Type 191 Constant
Am plitude Signal Generator.
2. Standard Amplitude
Calibrator
Am plitude accuracy 0.25%,
variable amplitude; 5 mV to
100 V ; frequency: 1 kHz
square wave.
Check horizontal and vertical
gain.
Tektronix calibration fixture,
Part Number 067-0502-01
3. Square-wave
Generator
Variable frequency: 10 Hz to
1 MHz; output amplitude:
400 mV to 80 V.
C heck p ro b e and vertical
compensation.
Tektronix Type 106 Square-
wave Generator.
4. 1:2 voltage step-up1
transformer
Double line voltage, 50 watt
rating.
Check power supply and charger
operation.
1:2 power transformer.
Variable A uto-1
transformer
Variable line voltage 90 V to
125 V.
Check power supply and charger
operation.
Superior Electric Powerstat
Type N10B.
5. Digital Multimeter
0.1 % accuracy. Check power supply and charger
operation.
T e k tro n ix DM501 (Used
with TM mainframe).
6. Time Mark Generator 0.1 % accuracy. Check horizontal timing.
Tektronix TG 501 (Used w ith
TM mainframe).
Both items can be replaced by a unit possessing the appropriate characteristics, such as General Radio W 10MT3W . The Voltage step-up
transformer is needed only when 230 VAC Line Voltage is not convenient.
REV. APR 1974
5-1