P6021
SECTION
5
PERfORMANCE CHECK
/
CALIBRATION
Introduction
This section provides procedures to be used in checking
the performance or in calibrating the P6021 Current Probe
and Termination. Limits and tolerances in this section are
given as calibration guides and are not
instru-
ment specifications.
To ensure measurement accuracy, check the performance
of the probe and termination whenever they are changed
from one test oscilloscope to another, especially when
changing input capacitance, and recalibrate if necessary.
Check the calibration of the probe and termination every
1000 hours of operation, or every six months if used in
frequently. Before calibration, thoroughly clean and inspect
the probe as outlined in the Maintenonce section.
The features provided by this section are:
Index.
The Short-Form Procedure lists the step numbers
and titles of the complete Performance Check/Calibration
Procedure and gives the page on which each step begins.
Therefore, the Short-Form Procedure can be used as an index
to the steps in the complete procedure.
Calibration Record.
The Short-Form Procedure can be
reproduced and used as a permanent record of instrument
calibration. Spaces are provided to record performance
data for this instrument or to check off steps as they are
completed.
Abridged Calibration Procedure.
The Short-Form Pro
cedure lists the adjustments necessary for each step and/or
the applicable tolerance for correct calibration. The ex peri
encyd calibrator who is familiar with the calibration of this
instrument can use this procedure to facilitate checking or
calibrating this instrument.
Performance Check.
The Calibration Procedure can be
used as a performance checkout procedure by completing
all portions except the ADJUST- part of a step. This checks
the probe and termination cover or making internal ad
justments.
Complete Calibration.
Completion of each step in the
Calibration Procedure checks the probe and termination to
the
orig
in
a
l
·
performance standards and gives the procedure
to set each adjustment to its optimum setting. Where pos
sible, instrument performance is checked be·fore
on
adjust
ment is made. For best overall instrument performance,
make each adustment to the exact setting even if the
CHECK- is within the allowable tolerance.
EQUIPMENT REQUIRED
General
The following items are required for calibration of the
P6021 Current Probe and Termination. Specifications given
5-1
are the minimum necessary for accurate calibration. All test
equipment is assumed to be correctly 'calibrated and oper
ating within the given specifications. If equipment is substi
tuted, it must meet or exceed the specifications of the rec
ommended equipment.
For the quickest and most accurate calibration, special
Tektronix calibration fixtures are used where necessary.
These special calibration fixtures are available from Tek
tronix, Inc. Order by part number through your local Tek
tronix Field Office or representative.
Test Equipment
1. Test oscilloscope. Bandwidth, DC to 75 megahertz;
deflection factor, .01 V/cm and .02 V/cm. Tektronix 580-
series recommended.
2. Pulse generator. Risetime, 0.25 nanosecond; amplitude
o
to 50 vol1s into 50 ohms. Tektronix Type 109 recom
mended.
3. Low-frequency constant amplitude signal generator.
Frequency, 120 hertz to 50 kilohertz; output amplitude, vari
able from 2.8 volts to 5 volts into 50 ohms; amplitude regu
lation accuracy, constant within 3"10 of reference at 50 kilo
hertz as output frequency changes. For example, General
Radio 1310-A Oscillator.
4. Transmission line. Risetime, 0.1 nanosecond; delay,
60 nanoseconds. Tektronix Type 113 Delay Cable recom
mended.
Accessories
5. Cable (two). Impedance, 50 ohms; electrical length,
5 nanoseconds; connectors, GR. Tektronix Part No. 017-
0502-00.
6. Attenuator (two). Impedance, 50 ohms; attenuation,
lOX;
connectors, GR. Tektronix Part No. 017-0078-00.
7. Attenuator. Impedance, 50 ohms; attenuation, 5 X;
connectors, GR. Tek
ix Part No. 017-0079-00.
8. Attenuator. Impedance,
50
ohms; attenuation, 2
X;
connectors, GR. Tektronix Part No. 017-0080-00.
9. Termination. Impedance, 50 ohms; description, end
line; connector, GR. Tektronix Part No. 017-0081-00.
10. Termination. Impedance, 50 ohms; description, thru
line; connectors, GR to BNC male. Tektronix Part No. 017-
0083-00.
11. Adapter. Description, GR to BNC male. Tektronix
Part No. 017-0064-00.
12. Adapter. Description, GR to BNC female. Tektronix
Part No. 017-0063-00.
13.
Adapter. D
e
scri
p
tion
,
Dual banana
plug
to BNC
fe
male.
Tektronix
Part No.1
03-0090-00.
REV A
OCT 1979
