Tektronix Type Z Instruction Manual page 23

NTRODUCT ON
A complete procedure for checking
standards and calibration of the Type Z Plug-In Unit is
provided in this section of the manual. The steps in the
procedure are arranged in correct sequence to avoid un ­
necessary repetition.
The step-by-step instructions also furnish an orderly ap ­
proach for isolation of malfunctions which may develop.
Consequently, this procedure should be used in conjunction
with any maintenance and troubleshooting system.
If an abnormal indication is obtained at some point in
the procedure, it is not usually necessary to locate its cause
before continuing to the next step. Additional symptoms
revealed by performing further steps will frequently simplify
the task of locating trouble. Obscure symptoms, if any,
usually show up when performing the first eleven steps of
the procedure.
For this procedure, the Z Unit should be used in con ­
junction with a properly calibrated Tektronix Type 540-
eries oscilloscope. Oscilloscope control settings for a
Type 541A Oscilloscope are listed in the procedure; cor ­
responding control settings should be used if a different
oscilloscope is used.
Test equipment used in a particular step should be eft
connected at the end of that step unless instructions state
otherwise. imilarly, controls not mentioned are assumed
to be in the positions they were in at the conclusion of the
preceding step.
If information explaining the normal operation of front ­
panel controls is needed before starting the procedure,
consult the Operating Instructions section of this manual.
EQU PMENT REQU RED
The following equipment or its equivalent is required to
perform a complete calibration of the Type Z Plug-In Unit.
1. quare-wave generator, Tektronix Type 105 or equiva ­
lent. Required specifications are: 13-nsec risetime or less;
output frequencies of approximately 1 kc and 10 kc; output
amplitude variable from 10 to 100 volts across 600-ohm
internal load.
2. quare-wave generator, Tektronix Type 107 or equiva ­
lent. Required specifications are: 3 nsec risetime or less;
output frequency of approximately 1 m c output amplitude
variable to at least 0.35 volt.
3. ine-wave generator, Tektronix Type
Amplitude
ifications are: frequency range of 50 kc to 13 m c ; output
the operational
amplitude of 0.14 volt or more; output must be adjustable
(manually or automatically) for constant amplitude within
the above frequency range.
4. Precision
accuracy of 0.05% or better; resolution of 50 μ volts or less;
must be of the nulling type with infinite impedance at null.
If a John Fluke Differential Voltmeter is available, use
Model 803 or equivalent.
5. Calibrated volt-ohm meter (VOM).
12/v at full deflection.
6. 24- μμ f Input Capacitance
C 24 (Part No. 011-029) or equivalent.
7. Plug-in cable extension, Tektronix Part No. 012-038.
8. Plug-in extension, Type EP54, Tektronix Part No. 013-019.
9. 52-ohm coaxial cable, Tektronix Part No. 012-001.
10. 52-ohm 5-to- 1 "L" attenuator, Tektronix Part No. 011-
002.
11. 52-ohm cable termination, Tektronix Part No. 011-001.
12. uggested tools: screwdriver, shank 2" long x 1/8"
dia.; 0.050" alien wrench;
Tektronix Part No. 003-000; alignment tool consisting of
a handle (Tektronix Part No. 003-007), a low-capacitance
screwdriver insert with a metal bit (Tektronix Part No.
003-334, and a hexagonal core insert (Tektronix Part No.
003-310).
NOTE — Make certain the — 150-, 4-100-, 4-225-,
and 4-350-volt power supplies in the oscilloscope
are regulating and within rated voltage toler ­
ances before attempting to calibrate the Z Unit.
Preset the Type 541 A Oscilloscope (or equivalent) front ­
panel controls as follows:
Horizontal Display
Time/cm
Variable Time/cm
Triggering Mode
Triqqer
tability
SECT ON
CAL BRAT ON
ignal Generator or equivalent. Required spec ­
d c voltmeter. Required
tandardizer, Tektronix Type
low-capacitance screwdriver,
PREL M NARY PROCEDURE
Normal
.5 Millisec
Fully Clockwise
AC
+ Internal
lope
Fully Clockwise
5
190A Constant-
specifications are:
ensitivity of 20,000
5-1