Measurement Parameters Setting
S-Parameters
For high-frequency network analysis the following terms are used: incident, reflected, and transmitted waves.
Measurement of the magnitude and phase of incident, reflected and transmitted signals allow for determining the S-parameters (scattered parameters) of the DUT. An S-parameter is a ratio between the complex magnitudes of two waves.
The Analyzer allows measurement of the full scattering matrix of a 2-port DUT. To measure the full scattering matrix, you do not need to change the connection of the DUT to the Analyzer.
For the measurement of S11, S21 parameters, test Port 1 will operate as a signal source. The incident and reflected waves will be measured by Port 1. The transmitted wave will be measured by Port 2.
For the measurement of S12, S22 parameters, test Port 2 will operate as a signal source. The incident and reflected waves will be measured by Port 2. The transmitted wave will be measured by Port 1.
S-Parameter Setting
A measured parameter (S11, S21, S12 , S22) is set for each trace. Before you select the measured parameter, first activate the trace.
To set the measured parameter, use the softkeys.
Absolute Measurements
Absolute measurements are measurements of the absolute power of a signal at a receiver input. Unlike relative measurements of S-parameters, which represent a ratio between the signals at inputs of two receivers, absolute measurements determine the signal power at input of one receiver. A 2-port Analyzer has four independent receivers: A, B, R1, R2.
R1 and R2 are reference signal receivers; A and B are test signal receivers. The A and R1 receivers are located in Port 1; B and R2 receivers are located in Port 2. There are six types of absolute measurements depending on the port number (See Table 9):
Table 9: Absolute measurements
| Symbols | Definition |
|---|---|
| A(1) | Test signal receiver A (Source Port 1) |
| A(2) | Test signal receiver A (Source Port 2) |
| B(1) | Test signal receiver B (Source Port 1) |
| B(2) | Test signal receiver B (Source Port 2) |
| R1(1) | Reference signal receiver R1 (Source Port 1) |
| R2(2) | Reference signal receiver R2 (Source Port 2) |
Absolute Measurement Setting
To select absolute measurements, use the Softkeys. |Item|Description | --- | --- | | Note | In absolute measurement mode, dBm measurement units are used for logarithmic magnitude format, W measurement units are used for measurements in linear magnitude format. Other formats are not applicable to absolute measurements as power is measured in scalar values. |