4
Flatness-Correction Operation
The basic setup procedure to obtain flat test port
output power is illustrated in Table 1. To simplify
the execution of the procedure, the front panel
hardkeys are enclosed in [brackets]. The softkeys
are enclosed in {braces}. Table 2 provides the pro-
cedure for setting up the power meter. The net-
work analyzer should be reset before performing
any procedures. The flatness-correction calibration
can be performed in step, ramp, or frequency list
sweep mode. Figure 2 illustrates test port power
versus frequency with and without flatness correc-
tion using an 85107B measurement system.
When the flatness correction is enabled in an
8510C measurement system the analyzer’s Power
Source 1 softkey controls the test port power level.
The source and test set used will determine the
available test port power range.
The maximum leveled power the source can out-
put at different frequency spans is indicated in
Table 3. Once the flatness correction is enabled,
the test port power level must be set within the
power range presented in Table 4 for common
source/test set combinations.
Figure 2. Comparison of test port power without flatness correction (channel 1)
and with flatness correction (channel 2)
