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Example 3:

Swept mm-wave measurement with

arbitrary correction frequencies

The focus of this example is on using user flatness

correction to obtain flat power at the output of the

Agilent 83550 series mm-wave source modules. In

this case we will use non-sequential correction

frequencies in a swept 26.5 to 40 GHz measurement

with an 83554 source module.

It is time consuming to perform large quantities of

power meter measurements. To reduce this time, we

will select non-sequential correction frequencies in

order to target specific points or sections of the

measurement range that we will assume are more

sensitive to power variations. This will greatly

expedite setting up the user flatness correction

table. The amount of interpolated correction points

between non-sequential correction frequencies will

vary. This example uses the 437B to automatically

enter correction data into the array.

Note: Turn off the 8360 prior to connecting the

source module interface (SMI) cable, or damage

may result.

Configure the measurement system as shown in

figure 9a or 9b. When the 8360 is preset, the

following occurs:

• The source module’s frequency span is

displayed on the source.

• The 8360 leveling mode is automatically

changed from internal to "module leveling."

• The source module's maximum specified

power is set and displayed.

Figure 9. (a) mm-wave module hookup diagram with high power 8360 (83623B/24B),

(b) hookup diagram with standard 8360 using an Agilent 8349B amplifier

83623B/83624B

synthesized sweepers

Source module

interface

RF out

RF in

GPIB

Test port

83554A

source module

83620B/83622B/

83640B/83642B

synthesized sweepers

(a)

(b)

8349B

microwave

amplifier

RF out

Test port

83554A

source module

Source module

interface

out

R8486A

power sensor

R8486A

power sensor

RF in

DUT

437B

power meter

437B

power meter

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