Sonifex SM-24, User Handbook Manual

Page: 18 / 68

6
Station Master & Talkback Intercoms Handbook
Studio Feeds, Transmission Outputs and Logging Outputs
Studio Feeds
Station Master takes an audio feed from each connected studio and routes them to the
transmission and logging outputs. It uses the offer and accept switching to know which
output should be switched to air - as soon as a studio accepts the offer made by the current
on-air studio, the output is switched to the accepting studio. The following connections
should be made :
The audio feed, from the master output of the mixing desk which you are using in each
studio, should be connected to the 25 pin D-type “AUDIO IN/OUT” plug connector, on pins 1,
2, 14 and 15 ( marked TRX left/right phase/non-phase). Pin 13 can be used as the screen for
these connections. This is the audio feed from the studio to the Station Master.
Once all the studios are connected, you will need to connect the Offer and Accept switching
(see the Section marked “Offer and Accept Switching”) to ensure that the correct studio is
switched to the transmission path.
Transmission Outputs
Depending on whether you are transmitting a mono or stereo signal, you can use either the
mono, or stereo balanced XLR-3 transmission outputs to connect the Station Master to a
limiter or processor before being sent to the transmitter.
Logging Outputs
Which logging output you use depends on what type of logging equipment you have
installed in your radio station. If you are using a balanced “professional” piece of logging
equipment, such as the Sonifex Net-Log audio logger, or a balanced PC based recorder,
then the balanced XLR-3 outputs should be connected. There are separate stereo and mono
outputs.
If you are using “consumer” logging equipment, such as domestic DVD-R recorders, then
there are three phono outputs which can be connected. Three outputs have been provided
so that three DVD-R’s can be used to record longer durations.
Logging Off-Air instead of Pre-Transmission
You can also choose whether to log the transmission output (before it is sent to the
transmitter), or whether to log the External Input 1, which could be defined as an off-air
receiver, so that you can log what is actually broadcast. On the main motherboard SM-MB-
02, check the following jumpers :
Jumper Set Over Pins Effect
JP5
1 & 2
2 & 3
The left logging output comes from the
transmission path.
The left logging output comes from External Input 1.
JP6
1 & 2
2 & 3
The right logging output comes from the
transmission path.
The right logging output comes from External Input 1.
Note : Items in bold are set as default when shipped.
S TAT I O N M A S T E R
O P E R AT I O N
2
ST
A
TION MASTER OPER
A
TION