DSPXmini-FM operational manual V1.2
8
S
PecIfIcatIonS
Specifications apply for measurements from analog left/right input to stereo composite output.
Frequency Response (Bypass Mode):
Follows standard 0µs or 7µs pre-emphasis curve ±0.10 dB, 2.0Hz–
1kHz.
Noise:
Output noise floor will depend upon on the processor settings but is governed by the dynamic range of
the A/D Converter. The dynamic range of the digital signal processing is 1 dB.
Processing Sample Rate:
8kHz - 768kHz depending on processing stage.
Processing Resolution:
Internal processing has 2 bit (fixed point) or higher resolution.
Analog Audio Input
Configuration:
Stereo
Impedance:
>10k. load impedance, electronically balanced
Nominal Input Level:
Software adjustable from –.0 to +8.0 dBu (VU).
Maximum Input Level:
+2 dBu or +12 dBu, depending on the internal jumper settings
Connectors:
XLR female Pin 1 chassis ground, Pins 2 (+) and electronically balanced, floating and sym-
metrical.
A/D Conversion:
8KHz 2 bit 128x oversampled delta sigma converter with linear-phase anti-aliasing filter.
Filtering:
RFI filtered.
Digital Audio Input
Configuration:
AES/EBU Stereo, 2 bit resolution, software selection of stereo, mono from left, mono from
right or mono from sum.
Sampling Rate:
2, .1, 8, 88.2, or 96 kHz, automatically selected.
Connector:
XLR female. Pin 1 chassis ground, pins 2 and transformer balanced and floating, 110 ohm
impedance.
Filtering:
RFI filtered.
MPX output
Source Impedance:
10 Ohm Single-ended, floating over chassis ground.
Load Impedance:
600 Ohm or greater.
Maximum Output Level:
+12.0 dBu (peak) software-controlled output level control
Minimum Output Level:
0dBu (peak)Software-controlled output level control
Pilot Level:
Adjustable from 6.0% to 12.0% and OFF, software controlled.
Pilot Stability:
19 kHz, ±1 Hz (10 degrees to 0 degrees C).
D/A Conversion:
2-bit
Signal-to-Noise Ratio:
<= –8 dB (Bypass mode, de-emphasised, 20 Hz – 1 kHz bandwidth.
Distortion:
<= 0.02% THD (Bypass mode, de-emphasised, 20 Hz – 1 kHz bandwidth.
Stereo Separation:
Typ. > 70 dB 0 Hz - 1 kHz.
Crosstalk-Linear:
<= –80 dB, main channel to sub-channel or sub-channel to main channel.
Crosstalk-Non-Linear:
<= –80 dB, main channel to sub-channel or sub-channel to main channel.
38 kHz Suppression:
>= 70 dB.
76 kHz & Sideband Suppression:
>= 80 dB.
Connectors:
BNC, floating over chassis ground
Filtering:
RFI filtered.
Subcarrier (SCA) Inputs
Configuration:
Subcarrier input sums into composite baseband output.
Impedance:
>10K
SCA input level Sensitivity:
Sums into MPX output at 10% injection.
Connector:
BNC, unbalanced and floating over chassis ground.
