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Appendix F. Serial Daughterboard
(SDB) Settings
The single-port serial transmitters and single-port and dual daisy chainable
serial receivers contain an internal serial daughterboard (SDB) that can be
configured for various serial modes. Quad Hub Cat5 transmitters do not
utilize the SDB and are configured for Mode 1 only.
The SDB hardware configuration is done via jumper settings. These jumpers
are used to set the various modes of operation. As shown below. Both ends
must be set the same.
To access the SDB on transmitters and receivers:
1.
Make sure the unit is powered OFF
2.
If necessary, unplug all cables to the unit.
3.
Unscrew the top screw as well as the two jack screws in the DB9
connector. Lift the cover off
Table C-1 shows the Transmitter SDB configuration settings.
Mode
Type
1
Simplex
(one way)
(to 1500 ft)
2
Full Duplex
(2 way)
Short (< 500 ft)
3/5
Full Duplex
Default
(2 way) Long (to
Setting
1500 ft)
4
Half Duplex
(2 way) Long
(to 1500 ft)
Notes:
•
Mode 1 is required when using multi output transmitters and when
daisy chaining receivers.
•
Mode 3 may introduce noise in video over 1,000 ft when serial
communication occurs. This does not apply when mode 5 is used
on the receiver.
•
JP1 5-6 and 7-8 terminate the serial bus and must be IN on the
transmitter.
APPENDIX F: RS-232 Serial Settings
Baud
JP1
JP1
(Max)
1-2
3-4
115k
OUT
IN
19.2K
OUT
OUT
19.2k
IN
OUT
115k
IN
IN
.
21
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