Agilent Technologies 8510XF Service Quick Reference Manual page 28

Detector Gain Cal
CAUTION
NOTE
Conversion Loss
Calibration
Before we begin the conversion loss calibration, we must perform a detector
gain calibration to compensate for the imprecision of the detector board
(E7340-60015 A7). Perform the following procedure for the detector gain
calibration:
1. Under the
Auxiliary Menus
2. Press softkey.
{More}
3. Press
{RF Power Config}
4. Press softkey.
{More}
5. Press
{Reset Det Gain Cal}
6. Follow the on-screen instructions until cal is completed.
If the operating system is reloaded, it is necessary to perform the detector
gain calibration.
It is recommended that this 5-minute calibration be performed once a month.
Additionally, a CW frequency accuracy test should be performed prior to
doing the conversion loss and power level flatness calibrations. Refer to
"CW Frequency Accuracy Test" on page
After performing a detector gain cal, you will be ready to perform the RF to
IF conversion loss calibration. This calibration provides the absolute power
level information at 25/50 MHz intervals over the entire frequency range of
the E7340/50A to compensate for conversion losses in the E7340/50A so
that ports 1 and 2 will be power leveled.
a. The external controller with its software changes the 8510XF CW
frequency and reads the power meter.
b. The entire frequency range is stepped in 25/50 MHz increments at
approximately 2200 points per port (25 MHz steps from 45 MHz to
18 GHz, and 50 MHz steps from 18 GHz to 110 GHz).
c. The result is stored in the millimeter controller EEPROM memory
board (A16) after all bands and heads are measured and should be
valid for one year or until a test head is repaired or replaced.
Making 8510XF Adjustments
, press hard key.
[System]
softkey.
softkey.
12.
8510XF Service Quick Reference Guide 3-7