ETS-Lindgren HI-3520 Microwave Monitor (Archived) - Manual (Page 22)

Page 18 HI-3520 Manual
power density level on the test data sheet in
mW/cm 2.
3.0 Repeat step 2.0 at 2.45, 3.8, 8.0, 12.0 and
18.0 GHz.
4.0 From the data in step 2.0 and 3.0, calculate the
average power density measured over the band
by taking the square root of the product of the
highest and lowest readings recorded. Record
the resultant on the data sheet for P
cal
.
5.0 Divide 0.2 mW/cm 2 by the power density level
recorded on the data sheet for P
cal
. This
determines the correction multiplier, M.
6.0 Alignment can now be performed at any one of
the calibration frequencies specified in steps 2.0
and 3.0. Select a convenient calibration
frequency.
7.0 At the selected calibration frequency, multiply by
M the indicated power density from the data
recorded in step 2.0 and 3.0 above. Record this
as P
REF
.
8.0 Remove the battery compartment cover and
located the calibration potentiometer behind the
hole adjacent to the battery cover screw hole.
NOTE:
It is necessary to remove the battery cover door
to adjust the calibration potentiometer but the
cover must be replaced for the RF test.
9.0 Apply the P
REF
power at the calibration
frequency. Adjust this potentiometer such that
Archived 4/2/10