Omnia Volt, Инструкция по установке и эксплуатации

Страница: 19 / 48

Connectors are RJ-45 female, EMI-suppressed and wired according to St ® standard.
AES/EBU program input and output appear on pins 1+2 of the corresponding RJ-45, with pin 4
as ground. St adapters are included with VOLT
5 : use the XLR connectors with a green
color sleeve.
If you want to apply an external sync signal for AES/EBU, use pins 3+6 of the input RJ-45; this
is the XLR female with a red color sleeve on our adapter. Sync source should be an AES/EBU
stream (often called “digital black”); VOLT does not sync to an unbalanced 75
Ω
word clock.
Livewire
Connect a Livewire Audio-over-IP network to the
Livewire/LAN
RJ-45 jack. Livewire must be
configured from a connected computer; see the chapter on Remote Control.
Don’t Know Jack?
St inputs and outputs, and Livewire or Ethernet LAN, all use identical RJ-45 connectors. You
can’t tell which is which by feel. Before connecting, look at the back-panel silk screening or the photo
in this chapter to make sure you’ve got the right one.
Composite connections
These are usable only if your VOLT is running an FM or FM Stereo Generator DSP|Core.
Composite Outputs
These are identical 75
Ω
outputs to feed a multiplex signal to your transmitter(s). Each is sepa-
rately adjustable from 0 V to 10 V pp in .5v steps. Pre-emphasis curve and mode, pilot level and
phase, and stereo separation are also adjustable. See the chapter on Remote Control for details.
SCA Input and Gain
This 75
Ω
input can be used for Subsidiary Communications (SCA) such as reading for the blind
or data casting. A signal from an external SCA or RDS generator, at this input, is mixed into both
composite outputs.
The Gain trimmer lets you adjust between -29 dB and +2.6 dB, accommodating signals between
10V and .25 V p-p for 8.6% injection on a 3.6 V composite output.
19k Sync Out
This is a TTL-level 19 kHz square wave, locked to VOLT’s stereo pilot, for use as a reference for
most RDS or SCA generators that operate at multiples of the 19 kHz pilot frequency.
5 Get additional adapters from your local dealer or http://www.radiosystems.com . Some stations prefer to run
AES/EBU over Cat-5 or Cat-6 cables with RJ-45; full connection details are at http://www.studiohub.com .
CHAPTER 3 |
11
INSTALLATION AND REAR PANEL