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5700A/5720A Series II Calibrator
Service Manual
3-18
Since frequency flatness is determined by stable parameters (i.e. circuit geometry and
dielectric constants), the flatness of the Wideband AC Module has excellent long-term
stability. Consequently, a two-year calibration cycle is adequate for flatness calibration,
and can be scheduled to coincide with the calibrator’s shipment to a standards laboratory
for periodic verification.
The following procedure describes how to perform the wideband gain calibration.
Note
To perform this procedure you will need, in addition to the standard
equipment supplied with the wideband option, a Type “N” female to double
banana plug adapter (e.g., Pomona 1740).
Before you start this procedure, make sure the calibrator is powered on and has
completed an appropriate warm-up period. Then proceed with this procedure to calibrate
the wideband gain.
1. Press the “Setup Menus” softkey; then press the “Cal” softkey to being up the menu
shown below:
PREV
MENU
IF3-1.EPS
2. Press the “Cal “ softkey to bring up the following menu:
PREV
MENU
IF3-2.EPS
3. Connect the wideband output cable between the WIDEBAND connector and the
SENSE binding post.
The center conductor of the 50Ω feedthrough should go to SENSE HI and shown in
Figure 3-6. The GND tab on the adapter should be on the LO side.