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5700A/5720A Series II

Operators Manual

7-18

7-11. Calibrating the Wideband AC Module (Option 5700A-03)

The Wideband AC Module (Option 5700A-03) can be installed in either the 5720A or

5700A Series II Calibrator. The module needs to be calibrated for both gain and flatness.

The gain should be calibrated when the 5700A-03 main output functions undergo their

routine calibration.

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. The

procedure for performing the wideband flatness calibration can be found in the

5700A/5720A Series II Service Manual.

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. The 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:

2. Press the “Cal “ softkey to bring up the following menu:

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 7-6. The GND tab on the adapter should be on the LO side.

Fluke 5700A Series II User Manual

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