Table 1-4 Test Record For Offset Accuracy Verification - Keysight 8990B Service Manual

12 Calculate the V
13 Repeat
14 Repeat
15 Repeat
Table 1-4 Test record for offset accuracy verification
Vertical scale Output
(V/d iv) vol tage
Video input channel 2 (50 Ω)
0.01 ±120 mV
0.02 ±240 mV
0.05 ±600 mV
0.1 ±1.2 V
0.2 ±2.4 V
0.5 ±4.0 V
1 ±4.0 V
Video input channel 2 (1 MΩ)
0.01 ±5 V
0.02 ±10 V
0.05 ±10 V
0.1 ±20 V
0.2 ±20 V
0.5 ±20 V
1 ±100 V
2 ±100 V
5 ±100 V
Keysight 8990B Service Guide
error+
record the value in Table
V = V – V
error DMM scope
step 5 to step 12
step 5 to step 13
step 3 to step 14
V V
DMM+ scope+
Performance Verification and Adjustments
and V respectively using the following equation and
error–
1-4.
for the rest of the vertical scale setting in
with the input impedance set to 1 MΩ.
for video input channel 3.
V V
error+ DMM–
V V V
scope– error– zero-error
1
Table 1-4.
V
zero-error
limit (±)
1.8 mV
2.6 mV
5.0 mV
9.0 mV
17.0 mV
41.0 mV
81.0 mV
1.8 mV
2.6 mV
5.0 mV
9.0 mV
17.0 mV
41.0 mV
81.0 mV
161.0 mV
401.0 mV
41