Specifications

14
In this example, a user flatness
correction array is created to provide
flatness-corrected power at the out-
put of an Agilent 83554A millimeter-
wave source module driven by an
Agilent E8247C signal generator.
The flatness correction array contains
28 frequency correction pairs
(amplitude correction values for
specified frequencies), from 26.5 to
40 GHz in 500 MHz intervals. This
will result in 28 evenly spaced flat-
ness corrected frequencies between
26.5 GHz and 40 GHz at the output
of the Agilent 83554A millimeter-
wave source module.
Array Using a MM-Wave Source Module
An Agilent E4416A power meter
(controlled by the signal generator
via GPIB) and R8486A power sensor
are used to measure the RF output
amplitude of the millimeter-wave
source module at the specified cor-
rection frequencies and transfer the
results to the signal generator. The
signal generator reads the power
level data from the power meter,
calculates the correction values,
and stores the correction pairs in
the user flatness correction array.
If you do not have the required
Agilent power meter or GPIB inter-
face, you can enter correction values
manually.
Required equipment
• Agilent 83554A mm-wave source
module
• Agilent E4416A power meter
• Agilent R8486A power sensor
• Agilent 8349B microwave amplifier
(required for signal generators
without option 1EA)
• GPIB interface cable
• adapters and cables as required
NOTE The equipment setups in
Figure 3-6 and Figure 3-7 assume
that, if the setups have an external
leveling configuration, the steps nec-
essary to correctly level the RF out-
put have been followed. If you have
questions about external leveling,
refer to “Leveling with a Millimeter-
Wave Source Module” in example 6
on page 19
1. Zero and calibrate the power meter
and power sensor.
2. Enter the appropriate power sensor
calibration factors into the power meter.
3. Enable the power meter’s cal factor array.
NOTE For operating information on your particular power
meter/sensor, refer to their operating guides.
1. Turn off the line power to the signal generator.
2. Connect the equipment. For standard signal
generators, use the setup in Figure 3-6. For
Option 1EA signal generators, use the setup
in Figure 3-7.
NOTE During the user flatness correction process, the
power meter is slaved to the signal generator via
GPIB. No other connections are allowed on the
GPIB interface.
NOTE When using Option 1EA signal generators, to
ensure adequate RF amplitude at the mm-wave
source module RF input, maximum amplitude loss
through the adapters and cables connected
between the signal generator’s RF output and the
mm-wave source module’s RF input should be
less than 1.5 dB.
Configure the power meter
Connect the equipment
CAUTION To prevent damage to the
signal generator, turn off the line
power to the signal generator before
connecting the source module inter-
face cable to the rear panel source
module interface connector.