Performance Tests
TDS 420A, TDS 430A & TDS 460A Service Manual
4-29
H Read the results at the CHx Pk-Pk readout, w hich automatically
measures the amplitude of the test signal. (See Figure 4--7.)
Set the horizontal
scale from the tables.
Set the generator
frequency to the test
frequency from
tables 4--3 and 4--4.
Read the results
from the readout of
measurement Pk-Pk.
1
2
3
Figure 4- 7: Measurement of Analog Bandwidth
g. Check against limits:
H CHECK that the Pk-Pk readout on screen is within the limits listed
in Table 4--3 (TDS 420A) or Table 4--4 (TDS 430A and
TDS 460A) for the current vertical scale setting.
H When finished checking, set the horizontal SCALE back to the
50 ns setting (the setting you used in step 1b.
STOP. Checking the bandwidth of each channel at all vertical scale settings is
time consuming and unnecessary. You may skip checking the remaining vertical
scale settings in Table 4--3 (TDS 420A) or Table 4--4 (TDS 430A and TDS 460A)
(that is, skip the following substep, h) if this digitizing oscilloscope has passed
the 100 mV vertical scale setting just checked in this procedure and passed the
Verify Internal Adjustment, Self Compensation, and Diagnostics procedure found
under Self Tests, on page 4--5.
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