Table of Contents
Advertisement
Single/Cont
Stop Meas
Trig Level
Trigger Pattern (bin)
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
(or after one measurement for NAMPS-NTACS RVC data).
•
Cont is used to automatically re-arm the analyzer and display the measurements on a
continual basis until Single is selected.
Selecting this field stops the analyzer when making single measurements.
The trigger level indicates the minimum signal level required to begin a
measurement that has been "armed." The level is adjusted by changing the
field's setting.
Level
The input level should be set high enough to prevent false triggering, but low
enough to allow triggering for valid signals. This may require you to set the input
level well below the expected level.
This field allows you to enter a specific bit pattern to filter displayed information.
The decoder only displays the received data when this binary pattern is
encountered immediately after triggering. This is helpful when you only want to
display messages containing very specific information.
The trigger pattern is entered as a sequence of ones, zeros, and dots. A dot will
cause the decoder to trigger for either a one or a zero in that bit position in the
received data stream.
Operating Considerations
This function is not available for decoding NAMPS-NTACS RVC information.
Chapter 8, Signaling Decoder Screen
AMPS-TACS, NAMPS-NTACS Decoder
Input
221
Advertisement
Table of Contents
