306
Chapter 10, Signaling Encoder (AF Generator 2)
AMPS-TACS NAMPS-NTACS Encoder
Each Filler field contains 7 hexadecimal characters representing the 2 type bits
and 26 information bits of the control filler/message word. The dotting, word
sync, and parity bits are generated automatically.
Operating Considerations
The control filler is sent continuously when Send Filler is selected, or after a
control message has been sent using Send. The control message is stopped
whenever Stop Filler, Filler, Channel, Data Rate, Polarity, or
AFGen2 To is selected.
Both filler fields must be full (seven digits) for the forward control channel
information to be structured correctly. Do not leave any blank spaces.
FM Coupling
This field alters the FM modulator to allow DCFM from internal and external
modulation sources. This field also selects ac or dc coupling between the RF
Generator’s frequency modulator and the rear-panel MODULATION INPUT
connector.
To Next Page
Loading...
