Agilent Technologies E4991A Service Manual page 126

Adjustment
Adjustment Program
Spot Adjustment
Spot Adjustment executes the corresponding adjustment automatically according to
replaced each analog board. Perform the Spot Adjustment when the analog board such as
A1,A2,A3,A4,A5 or A6 board is replaced. For example, if you replace or adjustment only
A1 board, perform only A1 Adjustment. For details, refer to Table 3-2 on page 124
Spot Adjustment consists of the following adjustments.
•
•
NOTE If your instrument has an option 001(A2 DC Bias), perform A2 Adjustment after
performing the A3 Adjustment.
•
126
A1 Adjustment
If you replace or adjust A1 Board, perform A1 Adjustment only.
The A1 Adjustment consists of the following adjustments.
— A1 VCXO Frequency Adjustment
— A3 Local Level Adjustment
— A3 Output AGC Gain Adjustment
— A3 Output Level Adjustment
— A4 Local AGC Gain Adjustment
— A4 Local Level Adjustment
— A4 IF Gain Adjustment
— Default Cal Coefficient Adjustment
A3 Adjustment
If you replace or adjust A3 Board(or the Standard Test Head), perform A3 Adjustment
only.
The A3 Adjustment consists of the following adjustments.
— A3 Local Level Adjustment
— A3 Output AGC Gain Adjustment
— A3 Output Level Adjustment
— A4 Local AGC Gain Adjustment
— A4 Local Level Adjustment
— A4 IF Gain Adjustment
— Default Cal Coefficient Adjustment
A4 Adjustment
If you replace or adjust A4 Board, perform A4 Adjustment only.
The A4 Adjustment consists of the following adjustments.
— A4 Local AGC Gain Adjustment
— A4 Local Level Adjustment
— A4 IF Gain Adjustment
Chapter 3