The signal source is described here: Impedances of source, load and DUTs. where also the first section of the receiver is described.
The rest of the receiver is described here: Measurement system November 2012 An amplifier with a PSA4-5043 was inserted between the 3dB pad on the circulator and the measurement system.
The Linrad S-meter is set to show dBm and the different DUTs are inserted and removed a couple of times. The average of the RMS power is computed (Linrad-03.47 and later.) Figure 1 shows the resulting screen for DUT2.
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| Figure 1. The signal level with and without DUT2. The average levels are 44.8296 and 44.7691 for an insertion loss of 0.0605 dB. | |||||
device Mismatch Insertion
loss loss
(dB) (dB)
Tx port 0.00005 0.0605
DUT1 0.16591
DUT2 0.00005
DUT3 0.00073
DUT4 0.03707
DUT13 0.16672
DUT31 0.17655
DUT123 0.16538
DUT132 0.16572
DUT312 0.17403
DUT213 0.16719
DUT231 0.17037
DUT42 0.03707
DUT24 0.08956
DUT34 0.00060
DUT32 0.00064
DUT23 0.00128
DUT43 0.00106
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Table 1 Impedance and mismatch loss for the different DUTs. |