PeakTech 4105 Bedienungsanleitung Seite 133

5.22.2 Channel Selection
Press 〖 Cal Channel 〗 softkey to cycle through calibration channel. If 'Channel A' is
displayed, user can calibrate for CHA. If 'Channel B' is displayed, user can calibrate for
CHB.
5.22.3 Trigger Level Calibration
Press 〖Cal Number〗 softkey. Configure the value to 0# to perform a trigger level calibration
of counter. Use the DC voltmeter to test the TP12 and TP19 on main board, and adjust the calibration
code to make the testing voltage of TP12 equals to TP19.
(Note: you need to open the case if you want to perform such calibration. If no necessary, this
calibration can be neglected)
5.22.4 DC Offset Calibration
Press 〖Next〗softkey. Configure the calibration code to 1# to perform a DC offset calibration.
Calibration conditions 'Amplitude=0Vpp, Offset=0Vdc' displays in windows, and select 'Cal Value'.
Use DC voltmeters to test the actual output DC offset and use keypad or knob to adjust the
calibration code, make the output DC offset equal to offset nominal value.
Press 〖Next〗softkey and the calibration number plus one automatically and display net offset
nominal value. Adjust the calibration code to make the output DC offset equal to nominal value. Make
sure perform the DC offset calibration from 1# to 4#.
5.22.5 Amplitude Calibration
Press〖Next〗softkey and the calibration number turns to 5#, then amplitude calibration begins.
Calibration conditions 'Frequency=1kHz' and 'Amplitude=7Vrms' displays, then select 'Cal Value'.
Use RMS voltmeters to test the actual output amplitude and adjust using keypad or knob, to make
the actual output amplitude equal to amplitude nominal value.
Press〖Next〗softkey again the calibration number will plus one automatically and new amplitude
nominal value displays. Adjust the calibration number to make the actual output amplitude equal to
amplitude nominal value. Make sure that perform the amplitude calibration from 5# to 7#.
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