Tektronix TDS7054, Руководство по обслуживанию

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Performance Tests
4- 44
TDS7104 & TDS7054 Service Manual
NOTE
. The sine wave generator output amplitude must be leveled to within
0.35 db of the reference frequency (10 MHz) through the bandwidth frequency
listed in Table 4--7 on page 4--46. The 0.35 db requirement is necessary to ensure
a bandwidth that meets Tektronix specifications.
You can perform bandwidth PV using an unleveled sine wave generator (with
amplitude error > 0.35 db). Under these conditions, the bandwidth PV is subject
to the flatness errors associated with the generator used.
Refer to the Sine Wave Generator Leveling Procedure on page 4--81 if your sine
wave generator does not have automatic output amplitude leveling.
c.
Hook up the test-signal source:
Connect the sine wave output of a
leveled sine wave generator to CH 1 . Set the output of the generator to a
reference frequency of 10 MHz or less. See Figure 4--18.
For the optional setup using a leveled sine wave generator with a
leveling head, see Figure 4--19 and, if using this optional setup with the
example Tektronix SG 504, set the generator output to 6 MHz.
TDS7000 oscilloscope
Sine wave
generator
Output
Figure 4- 18: Initial test hookup
TDS7000 oscilloscope
High frequency sine
wave generator
Output
Leveling head
Figure 4- 19: Optional initial test hookup