Orban OPTIMOD-FM 8700, Operating Manual

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OPTIMOD-FM DIGITAL TECHNICAL DATA
6-5
Pilot Protection: 60 dB relative to 9% pilot injection, ±250 Hz (up to 2 dB composite pro-
cessing drive).
Subcarrier Protection (60-100 kHz ): > = 70 dB (referenced to 100% modulation; with up
to 2 dB composite limiting drive; measured with 800 line FFT analyzer using “maximum
peak hold
” display).
57 kHz (RDS/RBDS) Protection: 50 dB relative to 4% subcarrier injection, ±2.0 kHz (up to
2 dB composite processing drive)
ANALOG COMPOSITE OUTPUTS .
Connectors: Two BNC, floating over chassis ground, EMI suppressed.
Maximum Load Capacitance: 0.047µF (0

source impedance). Maximum cable length of
100 feet / 30 meters RG
–58A/U.
Filtering: RFI filtered.
AES3 COMPOSITE OUTPUTS .
Connectors: One XLR-type.
Sample Frequency: 192 kHz
Extension to Interim Industry Standard: The composite baseband is internally sampled at
384 kHz and alternate samples are placed on the left and right audio channels. This is
equivalent to complex (I/Q) sampling and, with compatible receiving hardware, allows
the full frequency baseband frequency range to be accommodated without aliasing. If
the frequency range of the SCAs applied to the digital output is limited to less than 96
kHz, this is fully compatible and interoperable with the existing system adopted by the
industry, which uses only the left channel at 192 kHz.
Subcarrier (SCA) Inputs
NON-DIGITIZED INPUTS
Non-Digitized Inputs: 2 x non-digitized analog are summed into the analog composite
outputs but do not appear at the digital composite outputs.
SCA Sensitivity (Both Inputs): Variable from 220 mV p-p to > 10 V p-p to produce 10% in-
jection. Sensitivity is screwdriver-adjustable by trim pots that are accessible through
holes in the rear panel.
Connectors: Two BNC, unbalanced and floating over chassis ground, EMI suppressed.
Hardwire Bypass: The SCA1 input can be configured to accept the composite output of a
backup audio processor or stereo encoder; removing power from the Optimod will con-
nect this input to analog composite output #1 via a relay.
19 kHz Pilot Reference: SCA2 input jack can be jumpered to provide a 19 kHz pilot refer-
ence output or to serve as a second SCA input. The phase of the reference signal can
be set to 0

, 90

, 180

, or 270

with respect to the pilot tone appearing at the composite
output. The default is 0

.
DIGITIZED INPUTS
Number of Inputs: 2 x digitized analog . These are summed into the digital composite but
do not appear on the analog composite outputs.
Resolution: 16-bit conversion
Impedance: > 600

Audio-Over-IP I/O
Standard: Dante. Will be AES67-compliant after field-installable firmware upgrade for the
Audinate Ultimo chip, expected Fall 2017 from Audinate. (May require third-party soft-
ware to facilitate device discovery in non-Dante networks.)
Number of Input Channels Supported: Two stereo pairs.