Niles Audio HT-MSU - Manual (Page 17)

Figure 10. 3.5mm Stereo Plug and DB9 Connectors
Ring
Tip
Sleeve
Male
Female
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4) CONNECT ALL RS232
The RS232 Output jacks use 3.5mm STEREO plug with standard TRS (Tip, Ring and Sleeve)
configuration of Transmit, Receive, and Ground. This may require the installer to custom-
make the connection to the corresponding source. Most RS232 controllable sources use
one of the following as its RS232 input connector:
a) A Male DB9 connector
b) A Female DB9 connector
c) A 3.5mm stereo input jack
Most sources that are RS232 controllable provide a protocol document (usually from their
Tech Support Department) that will have all of the necessary information, including pin-out,
to custom build the RS232 control cable (
Figure 10).
5) CONNECT ALL STATUS
There are two types of status (power synchronization) ports on the HT-MSU: the TV/7
and RCV/8 status connections are 3.5mm mono ports; and SRC1 through SRC6 status
connections are RCA jack ports. The TV/7 and RCV/8 status connections are voltage-
sensing ports “looking for” 12V DC Volt input. The most common technique for “synching”
the home theater receiver is to use a Niles 12V (FG01035) power supply plugged into the
receiver’s switched outlet, and plugging the 3.5mm jack into the RCV/8 Status connection
port. The most common way to “synch” the TV (which usually doesn’t have a switched AC
outlet on the back) is to use one of the Niles synching accessories like the CS12V Current
Sensor or LS-1 Light Sensor. Both of these synching accessories have 12V outputs that can
be connected to the HT-MSU using a 3.5mm mono jack plugged into the TV/7 status port.
The SRC1 through SRC6 RCA connections are RCA jack ports that are “looking” for either
voltage or a video signal from the source. If a DVD is to be hooked up as SRC2 (use the
worksheets to help with source connection layouts), an RCA video cable would be used
to connect the DVD’s composite video output to the SRC2 RCA Status connection port.
If the DVD has only one composite video output, and that is being used to show video
on the TV, an RCA Y-adaptor can be used to split the video output (of the DVD) for both