Orban 5750 Technical Manual Introduction 1-3
Both analog and digital outputs are active continuously. Level control of the AES3 input is via software control
through the INPUT/OUTPUT screens. In addition, an AES11 sync input can accommodate house sync. It will lock the
5750’s two AES3 outputs to this sync even if the digital input is asynchronous to house sync. In Ratings Encoder Loop-
Through mode, AES3 output #2 drives the ratings encoder and the OPTIMOD’s Sync Input is repurposed to receive
the output of the ratings encoder. When not being used to receive the output of a ratings encoder, the sync input
can be used to receive audio as a silence-sense fallback source.
Analog Left/Right Input/Output
The left and right analog inputs are on XLR-type female connectors on the rear panel. Input impedance is greater
than 10k ; balanced and floating. Inputs can accommodate up to +27 dBu (0 dBu = 0.775Vrms). The left and right
analog outputs are on XLR-type male connectors on the rear panel. Output impedance is 50; balanced and floating.
They can drive 600 or higher impedances, balanced or unbalanced. The peak output level is adjustable from –6
dBu to +24 dBu.
Level control of the analog inputs and outputs is a accomplished via software control through System Setup.
Stereo Baseband Composite Output
The stereo encoder has two unbalanced analog baseband outputs on two BNC connectors on the rear panel. Each
output can be strapped for 0 or 75 source impedance and can drive up to 8V peak-to-peak into 75 in parallel
with up to 0.047F (100ft/30m of RG-59/U cable) before any significant audible performance degradation occurs
(see the footnote on page 1-16 and refer to Figure 2-3: Separation vs. load capacitance on page 2-10). Independent
level control of each output is via software in the INPUT/OUTPUT > COMPOSITE screen.
Digital Composite Output
The 5750 provides an AES3 digital composite output at 192 kHz sample rate. Its output level is set in the Input/Output
5 screen titled Composite 2. At the PC remote, it is located in the I/O SETUP SCREEN with the tab DIGITAL ENCODER.
This output appears on a male XLR-type connector on the rear panel. This output is fully compatible with and
interoperable with the de-facto industry standard digital connection being implemented by transmitter
manufacturers and others.
Subcarriers
The stereo encoder has two unbalanced 600 subcarrier (SCA) inputs with rear-panel BNC connectors to accept any
subcarrier at or above 23 kHz. The subcarriers are mixed into each composite output and their level is not affected
by the composite level control for that output.
The 5750 does not digitize subcarriers appearing at these two inputs; the mixing occurs after D/A conversion and is
analog.
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