7-12 Specifications
Delay
Defeatable Analog FM Diversity Delay: 0.27 to 12.0 seconds, adjustable in one-sample increments at 64 kHz sample
rate to allow the delays of the analog and digital paths in the HD Radio system to be matched at the receiver output.
When the Diversity Delay Mode = FM_HD, to avoid introducing artifacts in the analog FM path, its delay is held
constant and HD delay is varied if the adjustment does not exceed ±1.3 seconds. Larger adjustments change the
analog FM delay and re-center the HD delay within the ±1.3 second window. When the Diversity Delay Mode = FM,
the delay adjustments occur in the FM path with minimum delay in the HD path.
DAB+ Mode Delay: 0.365015625 to 8.0 seconds (FM path); 0 to 6.0 seconds (HD path). DAB+ mode is triggered by
setting any output to HD+DELAY. FM_HD Diversity Delay Mode is unavailable when the delay is in DAB+ mode.
Minimum Processing Delay: Processing structure dependent. Typically 17 ms for normal latency Five-band, 13 ms
for low-latency Five-band, 3.7 ms for ultra-low-latency Five- band, and 17 or 22 ms for 2-band, depending on
crossover structure chosen. MX presets have approximately 270 ms delay. The multipath mitigator adds 146 ms of
additional delay, and can be bypassed in situations like outside broadcasts where talent needs to monitor off-air. The
defeatable subharmonic synthesizer adds 67.5 ms of delay when active.
Headphone Monitor Processor Delay: The low-delay, dedicated headphone monitor processor has 5 ms of delay
and provides a complete FM processing chain, including 5- band compressor and distortion-cancelled FM clipper.
The clipper drive is adjustable to allow dialing in the preferred amount of “FM clipper sound.”
Analog Audio Input
Configuration: Stereo.
Impedance: >10kΩ load impedance, electronically balanced
1
.
Nominal Input Level: Software adjustable from –9.0 to +13.0 dBu (VU) / –2.0 t- +20.0 dBu (PPM)
Maximum Input Level: +27 dBu.
Connectors: Two XLR-type, female, EMI-suppressed. Pin 1 chassis ground, Pins 2 (+) and 3 (-) (electronically
balanced, floating and symmetrical.
A/D Conversion: 24 bit 128x oversampled delta sigma converter with linear-phase anti- aliasing filter.
Filtering: RFI filtered, with high-pass filter at 0.15 Hz.
Analog Audio Output
Configuration: Stereo. Flat or pre-emphasized (at 50μs or 75μs), software-selectable.
Source Impedance: 50Ω, electronically balanced and floating.
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