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S:\HP892XX\USRGUIDE\manual\decoscrn.fb
Chapter 8, Signaling Decoder Screen
Digital Paging Decoder
Polarity
This setting is used to match the polarity of the encoded signal being analyzed.
Normal Operation. When this field is set to
Norm, a logical high (1) is displayed
when a positive peak in the received signal is detected. A negative peak displays a
logical low (0).
Inverted Operation. When this field is set to
Invert, a logical high (1) is
displayed when a negative peak in the received signal is detected. A positive peak
displays a logical low (0).
Single/Cont
This field specifies how long you want the analyzer to decode incoming signals:
• Single tells the analyzer to display the information received during one gate time.
Measurements are displayed until Arm Meas is selected again.
• Cont is used to automatically re-arm the analyzer and display new measurements on a
continual basis until Single is selected. Previous measurement results are over-writ-
ten by subsequent measurements.
Stop Meas
Selecting this field stops the analyzer when making single measurements.
Trig Level
The trigger level indicates the minimum signal level required to begin a
measurement that has been “armed.” The level is adjusted by changing the
Input
Level
field setting.
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