Tektronix 221, Инструкция по эксплуатации

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Calibration—221 Service
Table 5-1 (cont)
TEST EQ U IPM ENT R E Q U IR E D
Description Minimum Specifications
Usage
Examples of Applicable
Test Equipment
7. Cable Impedance, 50 ohms; type,
RG-58/U, length, 42 inches,
connectors, BNC.
External trigger operation check.
H o riz o n ta l gain check and
adjustment.
T e k t r o n ix P a rt Number
012-0057-01.
8. Adapter Connectors, BNC female and
dual banana plug.
External trigger checks. T e k t r o n ix P a rt Number
103-0090-00.
9. Adapter
Connectors, GR874 and BNC
female.
Vertical Am plifier compensation
checks and adjustment
T e k t r o n ix P a rt Number
017-0063-00.
lO.Termination
I m p e d a n c e , 5 0 o h m s ;
accuracy, 2%, connectors,
BNC.
Vertical Am plifier compensation
checks and adjustment.
T e k t r o n ix P a rt Number
011-0049-01.
11. Attenuator Ratio, 10X; connectors, BNC;
impedance, 50 ohms.
Vertical Am plifier bandwidth
check.
T e k t r o n ix P a rt Number
011-0059-02.
12. Adapter Connectors, probe tip to
BNC.
Used throughout procedure for
signal interconnection.
T e k t r o n ix P a rt Number
013-0084-01
13. T-Connector Connectors, BNC. E x te rn a l tr ig g e r operation
checks.
T e k t r o n ix P a rt Number
103-0030-00.
-14. Screwdriver Three-inch shaft, 3/32 inch
bit.
Used throughout procedure to
adjust variable resistors.
Xcelite R-3323.
15. Low-Capacitance
Screwdriver
3/4-inch shaft.
5/64 inch bit.
U sed to a d ju s t v a ria b le
capacitors.
T e k t r o n ix P a rt Number
003-0675-00.
J.F D A d ju stm e n t Tool
5284.
P R E L IM IN A R Y PROCEDURE 4. See the Adjustment Locations in the pullout pages.
This instrument should be calibrated at an ambient
temperature of +25°C (±5°C) for best overall accuracy.
P R E L IM IN A R Y CONTROL SETTINGS
1 Disassemble as instructed in the Maintenance Section.
2. Connect the instrument to 90 Vac, to 250 Vac, 48 Hz
to 62 Hz or 80 Vdc to 250 Vdc line source.
3. Set the instrument controls as given in the Prelimi­
nary Control Settings. A llow at least five minutes of
warmup before proceeding.
NOTE
Titles fo r external controls o f this instrument are
capitalized in the procedure (e.g., INTENSITY).
Internal adjustments are in itia l capitalized only (e.g..
Sweep Cal).
Preset the instrument controls to the settings given
below, when starting the calibration procedures.
VO LTS/DIV
SEC/DIV
Vertical POS
Horizontal POS
TRIGGER
TRIG LEVEL/SLOPE
INPUT COUPLING
HORIZ-MAG
VAR SEC/DIV (Time/Div)
VAR VO LTS/DIV
INTENSITY
0.1
1 m
Midrange
Midrange
Internal
AUTO PRESET
GND
IX
CAL
CAL
(Out of CCW Detent, ON)
As desired.
5-2
REV. B, AUG. 1976