Agilent Technologies E8257D PSG User Manual page 158

Optimizing Performance
Creating and Applying User Flatness Correction
NOTE For specific frequency/amplitude ranges, see the mm–wave source module specifications.
2. Configure the signal generator to interface with the power meter.
a. Press Amplitude
.
E4419B
b. Press
Meter Address
c. For E4417A and E4419B models, press
channel.
d. Press
Meter Timeout
if unsuccessfully attempting to communicate with the power meter.
3. Press >
More (2 of 2)
This opens the User Flatness table editor and resets the cal array frequency/correction list.
4. Press
Configure Step Array
This opens a menu for entering the user flatness step array data.
5. Press >
Freq Start 26.5
6. Press >
Freq Stop 40
7. Press >
# of Points 28
This enters the desired flatness–corrected frequencies (26.5 GHz to 40 GHz in 500 MHz intervals)
into the step array.
8. Press >
Return Load Cal Array From Step Array
This populates the user flatness correction array with the frequency settings defined in the step
array.
9. Press >
Amplitude 0
10. Press .
RF On/Off
This activates the RF output and the RF ON annunciator is displayed on the signal generator.
Perform the User Flatness Correction
NOTE
If you are not using an Agilent E4416A/17A/18B/19B power meter, or if your power meter
does not have a GPIB interface, you can perform the user flatness correction manually. For
instructions, see
1. Press >
More (1 of 2)
This creates the user flatness amplitude correction value table entries. The signal generator begins
the user flatness correction routine and a progress bar is shown on the display.
2. When prompted, press
This loads the amplitude correction values into the user flatness correction array.
If desired, press
Configure Cal Array
This opens the user flatness correction array, where you can view the list of defined frequencies
144
> More (1 of 2) > User Flatness
> enter the power meter's GPIB address >
to adjust the length of time before the instrument generates a timeout error
>
Configure Cal Array More (1 of 2)
.
> .
GHz
> .
GHz
> .
Enter
>
> .
dBm
Performing the User Flatness Correction Manually
> .
User Flatness Do Cal
.
Done
.
> More (1 of 2) > Power Meter
to select the power meter's active
Meter Channel A B
> >
Preset List Confirm Preset
Confirm Load From Step Data
> E4416A , E4417A
.
Enter
.
.
below.
, E4418B , or
Chapter 4