View And Interpret The Transmission Measurement Results - HP 8711C User Manual

Making Measurements
Measuring Transmission Response
1. To view the entire measurement trace on the display, press
2. To interpret the transmission measurement, refer to Figure 3-6 or
b. A level of 0 dB would indicate a perfect through cable or device (no
3. To quickly determine the filter's minimum insertion loss, press (MARKERI)
4. Note the marker readout in Figure 3-6 provides the frequency and
amplitude of the minimum insertion loss point.
3-22
深圳市盛腾仪器仪表有限公司
your analyzer's display if you are making this measurement on your
instrument.
a. The values shown on the horizontal axis are the frequencies in MHz.
The values shown on the vertical axis are the power ratios in decibels
incident power. To display the result in logarithmic magnitude format
(designated by "Log Mag" at the top of the measurement screen), the
analyzer computes the measurement trace using the following formula:
Transmission (dB) =
where Ptrans = the power transmitted through the device and
where Pin= = the incident power.
loss or gain). Values greater than 0 dB indicate that the DUT has gain.
Values less than 0 dB indicate loss.
Marker &arch
Search Mkr -> Max.
Tel:0755-83589391
log
10
Fax:0755-83539691 Website: www.Sengt.c