28
SDS2000X HD Service Manual
Steps:
1.
Set the 9500B output to On.
2.
Connect a selected channel of the oscilloscope to the 9500B with an active head as shown in
3.
Set the oscilloscope into Non-interleaving mode (both CH1/CH2 and/or both CH3/CH4
activated). Set the timebase of the oscilloscope to
500 us/div, the “ Max Mem Depth ” in the
menu of Acquire to 1M, and the impedance of the selected channel to 1 M
Ω.
4.
Set the vertical scale of the selected channel to 10 V/div, the position to 0 V. Select the
Measure menu of the oscilloscope to display
the “ Mean ” measurement of the selected
channel.
5.
Set DC voltage output level of the 9500B according to Table 4, and record the
“ Mean ” value
of the channel as V
mean
.
6.
Calculate V
error
( V
error
= V
mean
– V
setting
), and set the next output level as step 5.
7.
Calculate gain error with these 9 data points: V
setting1
~V
setting9
, V
error1
~V
error9
by using the
‘ LINEST ’ function. Check if the slope falls within the range shown in Table 4.
8.
Set the next vertical scale of the selected channel to the other settings in Table 4, and repeat
step 4 to step 7.
9.
After measuring all vertical scales of the selected channel in turn, turn the 9500B output to Off.
10.
Connect another channel of the oscilloscope to the 9500B with the active head. Check the other
channels in the same way as step 4 to step 9.
11.
Set the oscilloscope into Interleaving mode (only one of CH1/CH2 and/or only one of CH3/CH4
activated). Set the impedance of the selected channel to 1M
Ω, set the timebase to 100 us/div,
the “ Max Mem Depth ” to 2M, and repeat step 4 to step 10 to measure all channels of the
oscilloscope in turn according to Table 4 which the vertical scale less than or equal to 1 V/div.
Table 4 DC Gain Accuracy Setting
Vertical
Scale
Applicable
Impedance
DC voltage output levels
DC Gain
Error Limit
10 V/div
1
MΩ
-37.5 V, -28.125 V, -18.75 V, -9.375 V,
0 V, 9.375 V, 18.75 V, 28.125 V, 37.5 V
± 0.6%
8.9 V/div
1
MΩ
-33.375 V, -25.03125 V, -16.6875 V, -8.34375 V,
0 V, 8.34375 V, 16.6875 V, 25.03125 V, 33.375 V
± 0.6%
