Tektronix 2A61 Instruction Manual page 26

Performance Check—Type 2A61
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g. Switch the Type 106 Square Wave Generator Hi Ampli-
tude-Fast Rise switch to Fast Rise.
h. Adjust the Type 106 Square Wave Generator + Tran-
sition Amplitude for approximately 4cm of vertical display.
See Fig. 5-6, waveform A.
i. Adjust the Type 106 Square Wave Generator Repetition
Rate Multiplier for 5m
of horizontal display.
See Fig. 5-6,
waveform A.
|. Switch the Type 2A61 FREQ RESPONSE FROM switch to
6%,
k. Observe the displayed waveform. Check for similarity
to waveform B in Fig. 5-6.
|. Switch through the FREQ RESPONSE FROM switch
position
6, 60
and 600 and
check the displayed
waveform against waveforms C, D and E, respectively, Fig.
5-6, for low frequency response characteristics.
Use the Type
2A61 POSITION control to position the start of the transition
to the same point on the graticule for each step.
m. Set the FREQ RESPONSE FROM switch to .06'V,
10. Check Trace Restorer
a. Reset the following controls:
Type 2B67
Coupling AC Fast
b. Connect the BNC end of the Special Input Cable (BNC
connector on one end and 4 pin connector on the other) to
the Standard Amplitude Calibrator Output.
c. Connect the 4 pin connector end of the Special Input
Cable to the Type 2A61 INPUT.
5-6
d. Center the trace vertically with the Type 2A61 POSI-
TION control.
e. Switch the Standard Amplitude Calibrator Mode switch
to +DC.
f. Switch the Standard Amplitude Calibrator Amplitude
switch to .1 volt.
g. Switch the Type 2A61 INPUT SELECTOR to —B.
h. Note that the Trace Indicator neon lights and then
extinguishes as the trace returns to the Type 561A graticule
area.
i. Allow the trace to return to the graticule center.
j. Switch the Type 2A6] INPUT SELECTOR to A.
k. Note that the Trace Indicator neon lights and then
extinguishes as the trace returns to the Type 561A graticule
area.
|. Switch the Standard Amplitude Calibrator Mode switch
fof.
m. Observe 5 divisions of display on the Type 561A CRT.
n. Push the trace restorer button (red button concentric
with the POSITION knob).
o. Note that the square wave display disappears into a
straight line.
p. Release the Trace Restorer bution and note that the
square wave display returns.
11. Check Line Filter
Requirement-Must attenuate the Power line frequency by a
factor of 50:1 (1 division of display).
a. Reset the following controls:
Type 2B67
Coupling AC Slow
Time/div 10 ms
b. Connect two patch cords with banana terminals on
each end, from the Audio Sine Wave Generator output jacks
on the dual banana to BNC Adapter. (Connect the Sine Wave
Generator ground to the black binding post.)
c. Connect a BNC female to BNC female adapter to the
BNC end of the dual banana to BNC adapter.
d. Connect the Special Input Cable to the BNC end of
the dual banana to BNC Adapter.
e. Adjust the Audio Sine Wave Generator Amplitude con-
trol for a display of 5 divisions on the Type 561A CRT. (See
Fig. 5-7A).
f. Set the Audio Sine Wave Generator Frequency to 60 Hz.
g. Switch the Type 2A61 mV/DIV switch to 2.
h. Switch the Type 2A61 FILTER to IN.
i. Check for not more that one division of display. (See
Fig. 5-7B.)