DA” to drive a variety of equipment. The output levels and other stereo generator settings are set through
software parameters in the
Stereo Generator
submenu of the
Input/Output
menu. An internal jumper sets the
output impedance to either 5 ohms (the factory setting) or 75 ohms. The default setting is appropriate for the
vast majority of exciter connections. However, in the event a higher source impedance is required, a jumper can
be moved (one for each composite output) on the motherboard to change the source impedance to 75 ohms. For
reference, JP10 is for Composite #1, and JP9 is for Composite #2.
19 kHz Sync Output (BNC)
This TTL-level 19 kHz square wave output can be used as the reference signal for any RDS or SCA generator
that operates at 57 kHz or other multiple of the 19 kHz pilot frequency. This Sync output is phase and
frequency locked to the stereo pilot. When this signal is used to synchronize an external SCA or RDS generator,
this locking assures that no difference frequencies exist which may cause intermodulation components between
the pilot and the SCA signal.
SCA Input (BNC)
Any SCA or RDS signal above 53 kHz can be added to the composite outputs of the OmniaONE by connecting
the signal to the SCA INPUT connector. The SCA signal is mixed in the analog domain directly into both
composite outputs. A high-pass filter on the SCA input provides SCA to main-channel crosstalk protection. The
SCA injection level can be adjusted using the
Gain
trimpot. See
Page 33
for details.
AES/EBU Digital Input, AES/EBU External Sync Input, and AES/EBU Output
(GREEN Male XLR)
(GREEN Female XLR)
(RED Female XLR)
The digital AES/EBU (AES-3) inputs (IN and EXT. SYNC) use industry-familiar RJ-45 connectors and utilize the
St wiring standard
1
. They accept any sampling rate between 32kHz and 96kHz. No user adjustment of the
sample rate is necessary on the AES-3 input as a high-quality digital sample rate converter is built in. There is one
AES-3 output on a standard RJ-45 connector that provides an output at selectable sampling rates.
Note:
The analog and digital outputs are active simultaneously.
1
More information about the St
®
wiring scheme can be found at:
http://www.studiohub.com/
For your convenience, two XLR adaptor cables are supplied with the unit. The male XLR lead with the
GREEN
shrink tubing is used for AES OUT. The male XLR lead with the
RED
shrink tubing is not used.
The female XLR lead with the
GREEN
shrink tubing is used for AES IN and the female XLR lead with the
RED
shrink tubing is used for AES EXTERNAL SYNC IN.
4
