Triggering The Mpt 1327 Decoder - HP 8920A User Manual

Table 7

Triggering the MPT 1327 Decoder

Test Mode Decoder Synchronization Sequence
Off
Control
Traffic
1200Hz
1800Hz
Dotting
The SYNC and SYNT patterns are those defined for the MPT 1327 Encoder. (The
defaults are C4D7 and 3B28
16
When a synchronization sequence is recognized, the message is placed (timeslot
aligned) into the receive buffer. The receive buffer is organized as 16
timeslots.
Decoder repetitive retriggering is used to minimize the decoder down-time
between messages. It is therefore important to extract the messages from the
decoder buffer as soon as possible after their arrival. This avoids the messages
being overwritten by further signaling.
Chapter 8, Signaling Decoder Screen
-
SYNC
SYNT
1111
0000
1010
respectively.)
16
MPT 1327 Decoder
×
128 bit
313