User manual

Appendix F: Redundant Backup F-3
Moseley SL9003Q 602-12016 Revision G
F.5 Equipment Interconnection
F.5.1 Starlink SL9003Q Backup Operation
Transmitter
Figure F-1 shows a typical Starlink QAM (STL) Main/Standby configuration for the transmitter
end of the link.
Transfer control is via the RJ45 shielded cables/RJ45-to-DB9 converters (230-12134 & 230-
12127, both supplied) between NMS card “XFER” input and the respective DB9 connectors on
the TP64 transfer panel.
The digital audio (AES/EBU) or analog audio lines may be split to both of the program inputs
through the use of wired XLR tees. (Note: The transmitter audio encoder input impedance
default is 10Kohms so paralleling the inputs with the tee is acceptable. If 600 ohm termination is
preferred internal jumpers E2 & E5 must be set to 600 ohms on the audio encoder of either the
main or the backup link but not both. Installing 600 ohm termination will lower the audio level by
6 dB).
The RS-232 data control aux channel can be split to both transmitters through a “modem
splitter”. The splitter may be a passive device, such as Black Box p/n TLO73A-R2 (3 port, MS-
3).