190 Series III
Service Manual
12
Input A, B, C, D AC Voltage Accuracy Test (LF)
Note
The test steps for channel C and D are only for the 4-channel models.
This procedure tests the Volts ac accuracy with dc-coupled inputs up to 50 kHz. The high
frequencies are tested in sections, Input A AC Voltage Accuracy (HF) & Bandwidth Test and
Input B AC Voltage Accuracy (HF) & Bandwidth Test.
XW
Warning
To prevent possible electrical shock, fire, or personal injury, make sure that the
calibrator is in standby mode before making any connection between the
calibrator and the Test Tool. Dangerous voltages are present on the calibration
source and connection cables during these steps.
To test the Input A, B, C, and D automatic scope ac Voltage measurement accuracy:
1. Connect the Test Tool to the 5502A. See
.
2. Select the Test Tool setup:
a. Recall the created setup (see
). Press
S
,
2
(RECALL) and select
SETUP
, press
E
, select the setup name, and press
E
to recall the setup.
b. Press
A
, then press
4
(INPUT A OPTIONS …).
c. Select
Attenuator: Normal | Bandwidth: 10 kHz
for the available setting in the
ScopeMeter (2 mV/d and 5 mV/d) or
| Bandwidth: 20 MHz
(other ranges).
d. Press
B
, then press
4
(INPUT B OPTIONS …).
e. Select
Attenuator: Normal | Bandwidth: 10 kHz
for the available setting in the
ScopeMeter (2 mV/d and 5 mV/d) or
| Bandwidth: 20 MHz
(other ranges).
f. Press
C
, then press
4
(INPUT C OPTIONS …).
g. Select
Attenuator: Normal | Bandwidth: 10 kHz
for the available setting in the
ScopeMeter (2 mV/d and 5 mV/d) or
| Bandwidth: 20 MHz
(other ranges).
20 V/div
+60.0 V
+58.5 to +61.5
-60.0 V
-61.5 to -58.5
50 V/div
+150 V
+142 to +158
-150 V
-158 to -142
100 V/div
+300 V
+289 to +311
-300 V
-311 to -289
Table 3. Volts DC Measurement Verification Points (cont.)
Range
5502A Output V DC
Reading
