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APPENDIX F: Pollable Serial Mode
Appendix G. Pollable Serial Mode
The SAP pollable serial daisychainable receivers with video, audio and RS232 serial
feature the ability to open a bi-directional session between a pollable transmitter and a
single pollable receiver in a daisychain installation.
Each pollable receiver must have a unique address set first. Once this has been done,
a special command is sent to the transmitter to specify the receiver to open a session
with. After this, serial communication can occur between the RS232 source and display.
The transmitter is always addressed 0.
Reference the
SAP II, SAP Communication Protocol User Manual
on configuration and
usage of the SAP series products.
If an address of 0 is sent, the RS232 commands will be broadcast to all receivers.
The following details the installation and setup procedure.
To set the receiver address requires that each internal serial audio daughterboard in
the receiver have a unique address set. This is done via an 8 position dipswitch. Use
the following chart to determine the proper switch addresses. All receivers must have a
unique address.
It is recommended to write the address on each receiver once this step
has been completed
. It is also recommended to keep a list of receiver addresses and
locations to make it easier to determine which receiver/display is desired to
communicate with.
1)
Remove the top cover assembly of the receiver
2)
Locate the 8 position dipswitch on the internal daughterboard assembly and using
the following chart, set the receiver address.
3)
Replace cover assembly and install unit.
4)
Reference the
SAP II, SAP Communication Protocol User Manual
on configuration
and usage of the SAP series products.
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