PROFESSIONAL SOUND CORP.
PRESS BRIDGEOPERATION MANUALCOPYRIGHT 2012

OVERVIEW
The Professional Sound Corporation® Press Bridge has been
designed to allow audio distribution at press conferences. This 3 input,
12 output device provides transformer-isolated audio feeds atmicrophone level. This Press Bridge features two microphone leveland one line level input, each with independent level controls, thus it
may operate without the use of any additional audio mixer.
An important distinguishing feature of this press bridge is the ability
to add additional "satellite style" output modules each with 12additional outputs, all the way up to a total of 300 outputs. Thesefreestanding output modules are available as the PSC "Press Train".
Up to 24 Press Train modules may be remotely located from the main
unit via standard microphone cables up to 100' in length thus
eliminating multiple long cable runs to each member of the media.
The Professional Sound Corporation® Press Bridge is housed in aheavy-duty Pelican case for easy shipping, transportation and set up.
It can be powered for more than 8 hours from four 9 volt batteries, orfrom the included 12Vdc adapter. A peak reading LED meter and aninternal tone oscillator are provided for level setting purposes.

OPERATION
1.

Confirm that the PSC Press Bridge has new batteries. Only use
alkaline cells. If the batteries are in good condition, the front
panel green LED will light when the Press Bridge is turned on. If
the batteries are below usable range, the LED will turn red,indicating the need to install fresh batteries. An external AC isincluded with the Press Bridge and may be used instead of thebatteries if AC power is available.
.

2.

You may wish to supply a reference tone to the various cameracrews prior to the press conference starting. This will allow thecamera crews to pre-set the levels to match the output levels of
the PSC Press Bridge. When using the Reference oscillator, you
should turn off all three audio inputs so that the PSC Press Bridge
will output a pure tone for reference purposes. Prior to the startof the press conference, turn off the reference oscillator andresume
mixingofthethreeaudioinputs.

3.

The PSC Press Bridge contains two microphone inputs and oneline level input. The two microphone inputs are designed tooperate with Dynamic microphones only, such as the ElectroVoice RE-50 or the Shure SM 57/58. Any combination of one or
two microphones and one line level signal may be used at anytime. The PSC Press Bridge contains a simple mixer function
allowing
youtomixanydesiredsignals.

4.

Operate the input level controls so that the peak reading LED
meter
responds
withpeaks
approaching
“0”
dB.

5.

The PSC Press Bridge contains 12-balanced outputs atmicrophone level. Each of these outputs is transformer balanced
and isolated (floating) from ground. This assures that each
output can be used to feed various camera crews without theworry of ground loops, etc. Notify the camera operators to set
their inputs to Microphone level and to turn off all microphonepowering.
Have them set their camera audio inputs to“Dynamic”.

6.

If you have a need for additional outputs beyond the 12 of thePress Bridge, you can add on the PSC Press Train for an additional
12-outputs. You can add up to 24-Press Trains for a total of 300
outputs. On the lower right-hand side of the PSC Press Bridgeface plate there are three XLR male connectors that output themixed audio at line levels. These outputs are used to connect tothe PSC Press Trains.
Press Trains can then be “Daisy-Chain”
wired with up to 8 Press Trains wired in series from each of thethree balanced line level outputs.

Professional Sound Corporation
28085 Smyth Drive, Valencia, CA 91355
Ph (661) 295-9395 Fax (661) 295-8398
sales@professionalsound.com

www.professionalsound.com