O,S,L Calibration - Agilent Technologies FieldFox N9912A User Manual

 Press Finish.

O,S,L Cal
An OPEN, SHORT, LOAD Cal is performed using discrete standards from a Cal
Kit. Several Cal Kit definitions are built into the FieldFox firmware.
Beginning with FieldFox Rev. A.05.15, multiple Cal Kits with the same connector
type can be added using the FieldFox Data Link Software. Learn more at:
http://na.tm.agilent.com/fieldfox/datalink_info.html.
See a list of supported Cal Kits in the N9912A Data Sheet. See page 186.
O,S,L Cal is extremely accurate when performed using the recommended Cal Kits
with standards that are in clean and good repair, and when using correct
connection procedures.
CAL ON U
measurement.
How to perform O,S,L Cal
Before performing an O,S,L Cal, set the Measurement type, Frequency Range,
Power Level, and Resolution of the measurement. The calibration will remain
highly accurate until these settings change, or the physical connection to the
FieldFox changes.
 Disconnect the DUT from the FieldFox.
52
Step 1
1. Disconnect the DUT from the FieldFox.
2. If a jumper cable or adapter is required to connect the DUT to the FieldFox,
connect those components to the FieldFox RF Out connector NOW. The
effects of those components will be measured and removed during the
calibration, and only the effects of the DUT will be displayed in the
measurement results. These should be high-quality components!
3. Do NOT connect anything at the point where the DUT connects.
4. Then press QuickCal.
Step 2
Attach and measure Load when:
▪ A jumper cable or adapter is used to connect the DUT to the FieldFox.
▪ Measuring a DUT with good match (return loss > 15 dB).
1. Connect a LOAD standard at the point where the DUT will be connected.
This improves measurement accuracy by removing the reflections from the
added length of cable or adapter.
2. Then press Measure Load
▪ Otherwise, and when making DTF measurements, press
does little to improve accuracy.
is shown on the screen when a QuickCal is correcting the
Cal ON Q
measurement.
is shown on the screen when an O,S,L Cal is correcting the
This step
Skip Load
N9912A FieldFox User's Guide