Adjust Attenuator Compensation (At100, At150); Figure 5-1: Attenuator Trimmer Layout - Tektronix 2212 Service Manual

2212 Service
Manual
Adjusbnent Procedures
Adjust Attenuator Compensation (ATl00, AT150)
Procedure
a. Set to Initial Control Settings
b. Connect the high-amplitude square-wave output from the
calibration generator via a probe tip-to-BNC adapter and the
10X probe to the CH 1 OR X input connector.
If necessary, use a 50
n
BNC attenuator.
c. Set the generator for a 1 kHz, five-division display and
compensate the probe using the probe compensation adjustment
(see the probe instruction manual)
d. Replace the probe and probe-tip-to-BNC adaptor with a 50
n
BNC cable and a 50
n
termination.
e. Set CH1 VOLTS/DIV to 50 m V
f. Set the generator to produce a five-division display.
g. Adjust : Trimmer C1 for a flat response with the square-wave
signal (See Figure 5-1 for location of the trimmers).
h. Replace the 50
n
BNC coaxial cable and the 50
n
BNC
termination with the probe and a probe-tip-to-BNC adapter.
Front Panel
Side
-
-
AT100, AT150
C4 C3 C2 Cl
0 0 0 0
Figure 5-1: Attenuator Trimmer Layout
i. Set the pulse generator to produce a five-division square wave.
j. Adjust-Trimmer CZ for a flat response on the square wave.
k. Replace the probe and probe-tip-to-BNC adaptor with a 50
n
BNC cable and a 50
n
termination.
1. Set the CH 1 VOLTS/DIV switch to 0.5 V.
m. Repeat parts f through j except adjust 'C3' and 'C4' trimmers
in part g and j respectively.
n. Set the Vertical MODE switch to CH 2.
o. Repeat parts b through m for CH2 attenuators.
p. Disconnect the test equipment from the instrument.
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