Ffsk Data Received Status - Tait TM8000 Series Applications Manual

3.2.15

FFSK Data Received Status

Configuration
Timing
Description
Related Actions
TM8000 3DK Hardware Developer's Kit Application Manual
September 2003 © Tait Electronics Ltd
This output signal indicates that the internal 1200 baud modem is detecting
valid FFSK signalling i.e. indicating data reception.
This signal might be used to alert application devices to the presence of data.
1. Configure the radio to expect FFSK data.On the Data form, check
either the CCDI Options/Transparent Mode Enabled checkbox or
the SDM Options/SDM Enabled check box.
2. Configure an output line and associate it with this action. Set the
active state to be high or low (as required).
The output will indicate the presence of FFSK data within 2ms of the
preamble/sync sequence being successfully decoded. Note that the
preamble/sync sequence is 32 bit periods long (approximately 27ms
duration).
The output will indicate the absence of FFSK once the channel is no longer
busy.
The output is activated when the radio successfully decodes an FFSK
preamble/sync sequence.
Important
The output will remain active as long as the channel
remains busy (even if FFSK signalling disappears) and will
become inactive once the incoming transmission ceases.
None.
Programmable I/O Lines 79