Wordclock/10 Mhz Sync Reference - Orban OPTIMOD 5750 Operating Manual

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Specifications
The digital 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.
Sample Rate: Internal free running at 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, or 96 kHz, se- lected in software. (Use
44.1 kHz or higher for best peak control.) Can also be synced to AES_IN1, AES_IN2 at 32 kHz, 44.1 kHz, 48 kHz, 88.2
kHz, and 96 kHz or Wordclock/10 MHz Sync Reference input as configured in software. Digital composite baseband
configuration runs standard at 192 kHz
Word Length: Software selected for 24, 20, 18, 16 or 14-bit resolution. First-order highpass noiseshaped dither can
be optionally added, dither level automatically adjusted appropriately for the word length.
Connector: XLR-type, male, EMI-suppressed. Pin 1 chassis ground, pins 2 and 3 trans- former balanced and
floating, 110Ω impedance.
Output Level (100% peak modulation): –23.0 to 0.0 dBFS software controlled.
Filtering: RFI filtered.
Frequency Response (Digital Audio Output (from Digital Radio Processing Chain)):
For output sample rates of 44.1 kHz and above, the frequency response from input to DR-configured output is
±0.10 dB, 2.0 Hz - 20 kHz; flat. The user may specify lowpass filtering to constrain the bandwidth to 15, 16, 17, 18,
or 19 kHz.
Relative Time Delay between FM and HD Outputs: Depends on setting of analog processing channel diversity
delay. Once set, this delay is constant regardless of processing preset in use.

Wordclock/10 MHz Sync Reference

Configuration: Accepts 1x wordclock or 10 MHz reference signals, automatically selected. The DSP master clock
can be phase-locked to these signals, which in turn phase-locks the 19 kHz pilot tone frequency, facilitating single-
frequency network operation. The digital output sample frequency can also be locked to these signals.
Level: Unit will lock to 1x wordclock and 10 MHz squarewaves and sinewaves having a peak value of 0.5 V to 5.0 V.
Connector: BNC female, grounded to chassis, non-terminating to allow reference signals to be looped through via
an external BNC "tee" connector (not supplied).