Tektronix NetTek YBT250, Руководство пользователя

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Taking Measurements
3- 70
YBT250 Field Transmitter & Interference Tester User Manual
Setting the Measurement Frequency
The frequency at which measurements are made is called the
Measurement Frequency. Before making a measurement, you must
ensure the Measurement Frequency is properly set.
The measurement frequency is indicated on the spectrum display in
two ways. One indicator is the
Freq (MHz) readout. For example, in
Figure 3--31 the Freq (MHz) readout shows a measurement
frequency of 878.4900 MHz. The second measurement frequency
indicator is the small triangle and circle that appears on the trace
display.
Note that the Measurement Frequency can be located anywhere in
the spectrum display; it does not have to be located at the center.
Measurement Frequency Indicator
Figure 3- 31: Measurement Frequency indicator
Do one of the following to set the measurement frequency:
H
Tap the trace at the point you want to measure the frequency
H
Select a channel number