EVAL-ADGM1004EBZ User Guide
UG-1078
Rev. 0 | Page 7 of 11
NETWORK ANALYZER CALIBRATION PROCEDURE
Use the following procedure in conjunction with the
EVAL-
ADGM1004EBZ
evaluation board for two-port measurements,
assuming the user has a set of manual calibration standards or
an electric calibration type unit to perform a short load open
through (SLOT) calibration of the network analyzer. The
maximum value for the network analyzer frequency sweep for the
EVAL-ADGM1004EBZ
PCB can be up to 16 GHz.
1.
Perform a full, two-port standard SLOT calibration of the
network analyzer.
2.
Connect the CALIBRATION THRU calibration line
(Connector RF5 and Connector RF6) to the analyzer and
measure its insertion loss S(2,1).
3.
Save the measured data to the network analyzer memory
for later use.
4.
Configure the
EVAL-ADGM1004EBZ
links and power up
the
EVAL-ADGM1004EBZ
with a 3.3 V dc power supply.
5.
Connect the network analyzer to the desired MEMS switch
RF connectors and apply the external control signals, if
needed.
6.
Measure the complete insertion loss of the
EVAL-
ADGM1004EBZ
. Include the insertion loss of the MEMS
switch and test fixture (PCB transmission lines and RF
connectors).
7.
Deembed the PCB losses from the complete evaluation
board measurement using the data saved at Step 3 and the
measured data at Step 6. Because the extraction method is
dependent on the network analyzer, consult the network
analyzer user manual before performing the extraction.
Typically, the divide function divides the complete S(2,1)
measurement data by the CALIBRATION THRU line
S(2,1) data stored in memory.
8.
Use the network analyzer port extension function to deembed
the phase offset introduced by the PCB transmission lines.
The port extension method uses time delay offset values to
correct for phase. Enter the time delay values into the port
extension menu on the network analyzer for each RF edged
connector to switch the pin path equal to the electrical
length of the calibration line divided by two.
