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Appendix A: Performance Specifications
Omnia.11 FM
All specifications are subject to change without notice.
Note: Discrete I/O measurements have been made in "Bypass" mode. FM composite measurements
have been made
using the "Proof” preset.
General Audio Specifications
Frequency Response:
Complies wit
h the standard 50 or 75 mi
crosecond pre
-
emphasis curve
within ± 0.5 dB, 30 Hz to 15 kHz. The analog left/right outputs and
AES/EBU Digital outputs can be configured for flat or pre
-emphasized
output.
System Distortion:
Less than
0.01% THD, 20 Hz
–
7.5 kHz. Second harmonic distortion
above 7.5 kHz is not audible in the FM system.
*Signal-Noise Ratio:
> -80 dB de-
emphasized, 20 Hz
–-
15 kHz bandwidth, referenced to
100% modulation).
*The measured noise floor will depend upon the settings of the Input and Output Gain controls and is primarily governed
by dynamic range of the Crystal Semiconductor CS5361 A/D Converter which is specified as >110 dB. The dynamic range
of the internal digital signal processing chain is >144 dB.
Stereo Separation:
Greater than 65 dB, 20 Hz
–-
15 kHz; 70 dB typical.
Crosstalk:
> -
70 dB, 20 Hz
--
15 kHz.
System Latency:
36ms. “FM” channel, as measured from the analog inputs through the composite MPX
output.
Composite Outputs:
Source Impedance: 5 ohms or 75 ohms,
jumper
-
selectable. Single
-ended
and floating over chassis ground.
Output Level: 0V to 10V in 0.05V steps, software adjustable.
D/A Conversion: Texas Instruments/Burr Brown PCM1798, 24
-bit sigma-
delta converter.
Configuration: Two electrically independent outputs. Software based
level adjustment.
Load Impedance: 50 ohms or greater load is suggested.
Pilot Level: Adjustable from 4.0% to 12.0% in 0.1% steps and OFF.
Pilot Stability: 19 kHz, ± 0.5 Hz.
Signal-to-Noise Ratio: -85 dB ty
pical, 75 μS de
-
emphasized, 15 kHz
bandwidth, referenced to 100% modulation).
Distortion: < 0.02% THD 20 Hz
–
15 kHz bandwidth, 75 μS de
-
emphasized, referenced to 100% modulation.
Stereo Separation: > 65 dB, 30 Hz
–
15 kHz.
Linear Crosstalk: >
-80
dB, main to sub or sub to main channel
(referenced to 100% modulation).
Non-
linear Crosstalk: >
-
80 dB, main to sub or sub to main channel
(referenced to 100% modulation).
38 kHz Suppression: > 70 dB (referenced to 100% modulation).
76
kHz Suppression: > 80 dB (referenced to 100% modulation).
Pilot Protection: >
-
65 dB relative to 9% pilot injection, ± 1 kHz.
57 kHz (RDS/RBDS) Protection: better than
-50 dB.
