SIGLENT
22 SDS1000CFL Service Manual
To verify DC Gain Accuracy
DC Gain Accuracy error = |1- {(V
pos
－
V
neg
) / (V
S)
－
V
Setting(-)
)} | < 3%
Note:
“V
Setting”
represents DC voltage output level
This test verifies DC Gain Accuracy of all channels.
Steps: 1. Set the DC voltage source output level to
0v
.
2. Connect channel 1 of the oscilloscope to the DC voltage source of
FLUKE 9500B using the BNC cable specified.
3. Set the Volts/Div of channel 1 to 5v/div.
4. Set the DC voltage output level to the positive voltage listed below
and then record the reading as Vpos.
5. Reverse the polarity of the DC voltage source and then record the
reading as Vneg.
6. V
sub
= V
pos
－
V
neg
,
calculate
V
sub
and then check to see if it is in the
accuracy limits range below.
7. Set the Volts/Div of channel 1 from 2v/div to 2mv/div, and then record
the reading in the same way as step 4 to 6.
8. Set DC voltage source output level to 0v.
9. Disconnect the connection of channel 1.
10. Check the other channels in the same way as step 1 to 9.
Table 3-2 DC Gain Accuracy
Volt/Div
DC voltage output levels Accuracy limits range for V
sub
5v/div
+15V, -15V
29.1 V~30.9 V
2v/div
+6V, -6V
11.64 V~12.36 V
1v/div
+3V, -3V
5.82 V~6.18 V
500mv/div
+1.5V, -1.5V
2.91 V~3.09 V
200mv/div
+600mV, -600mV
1.164 V~1.236 V
100mv/div
+300mV, -300mV
582 mV~618 mV
50mv/div
+150mV, -150mV
291 mV~309 mV
20mv/div
+60mV, -60mV
116.4 mV~123.6 mV
10mv/div
+30mV, -30mV
58.2 mV~61.8 mV
5mv/div
+15mV, -15mV
29.1 mV~30.9 mV
2mv/div
+6mV, -6mV
11.52 mV~12.48 mV
