Agilent Technologies 8510C, Operating And Programming Manual

Page: 54 / 391

Figure 2-4. Display with Open Circuit Connected Figure 2-5.
Display with S
11
Response Calibration ON
Figure 2-6.
Display with Thru Connected (S
21
Calibration)
Figure 2-7.
Display with S
21
Response Calibration ON
3. Making a Measurement
In this step, an actual measuremen t is completed.
T o measure return loss (S
11
) in LOG MA G format (frequency domain measurements)
In the frequency domain mo de, the X-axis of the display represen ts the frequency span. In
frequency domain, observ e the p erformance c haracteristics of y our DUT with resp ect to
frequency .
1. Connect the device under test b et w een P ort 1 and P ort 2 as sho wn in Figure 2-2.
2. Read the Return Loss of the DUT.
a. Press 4 CHANNEL 1 5 4 S11 5 4 LOG MAG 5 4 MARKER 5.
b. Use the RPG knob to p osition the marker at an y p oint on the trace. The measured
return loss, magnitude and v alue at the marker p osition is display ed ab o v e the graticule.
The frequency v alue is display ed in the active function area. See Figure 2-8 for an
example of the t ypical display .
3. T o read the measured phase angle, press 4 PHASE 5.
4. T o p osition the trace automatically for viewing, press 4
AUTO
5.
Introductory Measurement Sequence 2-9