3-7
SM 701730-01E
Adjustments
3
3.5 Flatness Adjustment on the Analog Board
Note
Before performing this flatness adjustment, the DC gain adjustment on the AD board must
have been completed.
Procedure
1.
Remove the top cover, printer cover, printer case, front bezel, and shield cover.
2.
Turn on the power and allow the unit to warm up for ten minuets or more.
3.
Connect each instrument as shown in figure 3.4, “Connection Method.”
Calibrator
Programable Head
DL1720E/DL1740E/DL1740EL
Figure 3.4 Connection Method
4.
Press the SETUP key and select the Initialize soft key to execute initialization.
5.
Press the MISC key and select the Calibration soft key.
6.
Select the Cal Exec soft key to perform calibration.
7.
For adjustment of the /10 range, enter the settings on the DL1720E/DL1740E/
DL1740EL oscilloscope and calibrator as follows.
DL1720E/DL1740E/DL1740EL
VERTICAL (for all channels)
V/div:
100 mV/div
Probe:
1:1
HORIZONTAL
T/div:
10
µ
s/div
TRIGGER
Source:
Input channel
ACQ
Mode:
Box Average
DISPLAY
Format:
Single
Calibrator
Waveform:
Square wave
Frequency:
10 kHz
Amplitude:
600 mV
P-P
8.
Adjust the variable capacitors CV101 and CV201, (refer to figure 3.5,
“Adjustment Point Location Diagram”) so that the top of the waveform becomes
flat as shown in figure 3.6, “Observed Waveform.” The waveform must fit within
±
0.1 div.
