I
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I
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Creating User Flatness Arrays
b. Select the number of correction points, using the keypad for your entry.
Valid entries range from 2 to 801, then press
CH+./ENTER).
c. The MARKER/SWEEP/STATUS display should now read:
Connel:t.
437E:
PM --
Et,ITER.
2. Press
CHZ/S/ENTER)
to start the calibration. The display will show each
correction point’s frequency and power as it is measured.
3. When the calibration is finished, the flatness correction is automatically
turned on, and the FLTNESS ON LED annunciator is lit on the front panel
of the sweeper. Power correction will be linearly interpolated between the
measured correction points.
4. Save the calibration by pressing
CsAVEJ
(iJ on the sweeper.
Attention!
If the calibration is not saved in an instrument register, and the sweeper or analyzer is preset, a
register is recalled, or the power offset is changed, the calibration will be lost. Reactivating the
SYSINTF on the analyzer will also cause a preset and loss of the calibration. Be sure to save the
calibration as described in the previous step before continuing.
To
reactivate
the
HP
8757
system
interface
1.
Press the softkey SYSINTF
OH
OFF on the analyzer and the sweeper will
preset.
2. Press
(RECALL_)
(iJ to pull up the calibration.
3. Devices can now be tested.
5-9
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General