PeakTech 4105 Bedienungsanleitung Seite 134

5.22.6 Flatness Calibration
The amplitude of output signal will decrease as the frequency increasing if frequency is greater than
1MHz. Therefore, you need to calibrate for different frequency point. Amplitude flatness uses the
relative comparison method and makes the amplitude with 100kHz frequency as comparison
standard. The nominal amplitude is 14dBm and 0dBm.
(1) Press 〖Next〗 softkey until the calibration number becomes to 20#, then perform the calibration for
the first section amplitude. Calibration condition is Frequency=100kHz and Amplitude=14dBm.
Use spectrum analyzer to test the actual output amplitude as standard value of first section.
Press〖Next〗softkey again, the calibration number will plus one automatically. The calibration
condition is Frequency=01MHz but amplitude nominal value remain unchanged. Adjust the
calibration value to make the output amplitude equal to standard value of first section amplitude.
Make sure that perform the calibration of first section amplitude from 20# to 60#.
(2) Press〖Next〗softkey until calibration number turns to 70# to perform the flatness calibration for
second section. The condition is Frequency=100kHz and Amplitude=0dBm. Use the spectrum
analyzer to test the actual output amplitude and make this value as standard value.
Press〖Next〗 softkey again, the calibration number plus one automatically. The condition is
Frequency=01MHz and amplitude remain unchanged. Adjust the calibration value to make the
actual output amplitude equal to standard value of second section. Make sure that perform the
calibration for second amplitude flatness from 70# to 110#.
5.22.7 Calibration Value Storage
Make sure to store the calibration value after finishing calibration in case that the value is lost once
power off. Press 〖Cal Store〗softkey then select 'Cal Store' to store present calibration value in
non-volatile memory and does not change when power has been off. Store the new calibration value
will cover the previous value in memory location. To protect the previous calibration value, an enquiry
'Will cover original data, Store?' will pop up before storage. Only press 〖Yes〗 softkey to enable the
storage. Otherwise, press 〖Cancel〗softkey.
Press 〖Cal Store〗softkey then two storage locations displays in operation menu, 〖Default Value〗
and 〖User Value〗. Press 〖User Value〗softkey to store the present calibration value to appointed
storage location. 'Store' will be displayed after finishing storage.
〖Default Value〗 location stores the factory default calibration value, to prevent it from damage, which
is not allowed for store operation.
If calibration disabled, the generator is in safe state and can't allow store operation.
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