Tektronix PS 503A, Instruction Manual

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Specification and Performance Check—PS 503A
Table 2-4 (cont)
Description
Performance
Requirements
Application
Example
Adapter
Bnc female to dual-banana
plugs.
Provides signal inter­
connection.
Tektronix
Part No.
103-0090-00.
Load resistor 20 Ω, 20 W, 5%,
(two 10 Ω, 10 W in series).
Load tests. Tektronix Part No.
308-0246-00.
Load resistor 5 Ω , 5 W, 5%. Load tests. Tektronix Part No.
308-0179-00.
Resistor
(2
required)
4.99 kΩ, 1/2 W, 1%
or better.
Dual tracking detector
test.
Tektronix Part No.
323-0260-00.
1X passive probe
Compatible with 5A-series
amplifiers used in
oscilloscope.
Provides signal inter­
connection.
Tektronix P6028
Probe.
'Requires TM 500-Series Power Module.
Preliminary Procedure
1. Ensure that all test equipment and the PS 503A
under test are suitably adapted to the line voltage to be
applied. Refer to the installation section of the power
module manual.
2. Be certain that the POWER switch on the power
module is off and that the OUTPUT pushbutton on the
PS 503A is in the out position.
3. Install the PS 503A in the far right (high power)
compartment of the power module.
4. Connect the power module to the autotransformer
and connect the autotransformer to the line voltage
source. Set the autotransformer voltage output control for
zero volt output.
5. Set all front-panel controls on the PS 503A fully
counterclockwise (ccw). Apply power to the power
module and press in the OUTPUT pushbutton on the
PS 503A. Push the PS 503A VOLTS DUAL TRACKING
control in.
6. Adjust the autotransformer to the nominal line
voltage and check that the two VOLTS indicator lights on
the PS 503A are on.
7. Set the vertical deflection factor for 1 mV/div and
sweep rate for 5 ms/div on the test oscilloscope. Use ac
coupling for the vertical amplifier unit during this
procedure.
8. Connect all test equipment to a suitable line voltage
source.
9. Turn on all test equipment and allow at least twenty
minutes for the equipment to warm-up and stabilize.
NOTE
During warm-up time, attach banana pins to the
leads of the 20 Ω and 5 Ω load resistors so that they
can be inserted in the holes of the dual-banana
adapter. This allows the load resistors to be con­
nected as close as possible to the output terminals
on the PS 503A so contact resistance is kept to a
minimum.
2-5