the stored register. Make sure that user flatness correction is still enabled before making the measurement.

When an HP 437B power meter is used to automatically enter the correction data, the correction calibration routine automatically turns off any active modulation, then re-activates the modulation upon

the completion of the data entry process. Therefore, the scalar pulse modulation that is automatically enabled in a scalar measurement system is disabled during an HP 437B correction calibration.

Note

The

user flatness correction array cannot be stored to a disk. You

 

must

make sure that

the array is stored in one of the eight internal

 

registers. Recalling a

file from an HP 8757 disk will not erase the

 

current array; therefore you may recall an array from an internal

 

register, then recall an associated file from a disk.

 

 

 

 

For this example, refer to menu map 5, POWER.

1.The equipment setup shown in Figure 1-21 assumes that you have followed the steps necessary to correctly level the configuration. If you have questions about external leveling refer to earlier paragraphs titled, “Externally Leveling the Synthesizer .”

2.On the analyzer, press [PRESET). Reset the analyzer and synthesizer to a known state.

Setup System Parameters

3.On the synthesizer, press FREQUENCY (START) @ (GHz, (STOP)@@m.S et the s nythesizer for a frequency sweep of 2 to 20 GHz.

4.Press [POWER LEVEL) 0 @. Where n = maximum available power.

5.On the analyzer, set up the appropriate measurement

(i.e. gain for an amplifier). Calibrate the measurement (thru and short/open calibration). Press ISAVE) (iJ to store the analyzer’s configuration and synthesizer parameters in storage register 1.

6.Turn off the HP 8757 System Interface. Use the analyzer SYSINTF ON OFF softkey found under the SYSTEM menu to deactivate the system interface.

Access User Flatness Correction Menu

7.On the synthesizer, press POWER Cm). Select

Fltnesa M e n u .

8.Select Delete Menu Delete All . This step insures that the flatness array is empty.

1-44 Getting Started Advanced