98
34405A User’s and Service Guide
4
Performance Tests and Calibration
9
Verify the Ohm Gain adjustments using the
“Ohms Gain Verification
Test”
on page 75.
Frequency Gain Adjustment Procedure
Review the
“Test Considerations”
on page 67 and
“Gain Adjustment
Considerations”
on page 90 sections before beginning this procedure.
1
Press
to enter Frequency Gain Calibration.
2
The primary display will show the calibration value and the secondary
display will show the reference value of
Cal Item
.
3
Configure each
Cal Item
shown in the adjustment table below.
4
Use
(Auto) or
(Range) to select the
Cal Item
.
5
Apply the input signal shown in the Input Voltage and Frequency
column of the table.
Table 19
Ohms Gain Adjustment
Input
Function
Cal Item
Dual Banana Plug with copper wire short between 2 terminals
2 - Wire Ohms
Short
Input terminals open (remove any test leads or shorting plugs
from the input terminals)
Open
10 M
Ω
10 M
Ω
1 M
Ω
1 M
Ω
100 k
Ω
100 k
Ω
10 k
Ω
10 k
Ω
1 k
Ω
1 k
Ω
100
Ω
100
Ω
Freq
Freq
N O T E
Always complete tests in the same order as shown in the appropriate table.
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