4
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. Th
e default setting is appropriate for the
vast majority of exciter connections. However, in the event
that 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 o
hms.
For reference, JP10 is for Composite #1, and JP9 is for Composite #2.
19 kHz Sync Output (BNC) (Active on FM Style Only)
This TTL-
level 19 kHz square wave output can be used as the reference signal for
most
RDS or SCA generator
s
that operate at 57 k
Hz 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) (Active on FM Style Only)
Any SCA or RDS signal above 53 kHz can be added to the composite outputs of the
Omnia ONE by connecting
the signal to the SCA INPUT co
nnector. 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 77
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 either an internally generated output sample
rate of 48 kHz or the sample rate can be locked to an external AES/EBU signal applied to pins 3 & 6 of the the
AES
IN / SYNC IN
connector or to the AES/EBU input signal. These options are selectable using the
“Samp. Rate”
setting in the
Output
submenu of the
Input/Output
menu.
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 t
he
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.
