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Specifications

BUS SPECIFICATIONS

Note: Specifications subject to change, especially those marked "TBD"

Audio/control signals only. No power.
Audio signals onto virtual earth busses.
All audio busses balanced.

Audio signals:
10k bus resistors (0.1% tolerance or better)
-4dBu nominal feed level into bus resistors

PFL Sense
Connect sense lines together with 1k0 resistor for PFL active

Signals
Main buses: L, R, 1, 2, 3, 4
Aux buses: 1, 2, 3, 4
PFL: audio, sense
Other: REF0 (common reference across all modules)

Connector
26-way IDC header, gold-plated contacts, latching, right-angle
Support for 25-way D-sub for inter-cabinet bussing (wire #26 not connected)

Cable
26-way 0.05in-pitch PVC-insulated IDC ribbon, flat-n-twist (e.g., Amphenol SpectraStrip part 132-2801-026 or 3M part 1700/26)

PERFORMANCE SPECIFICATIONS

Output impedance: < 60 Ohms
Frequency response (line input to main output): 10Hz to 40kHz (+0, -0.5dB) @ 0dB gain
THD+N @ +4dBu Output (line input to main output @ 0dB gain): < 0.005% (@ 1kHz)
Noise : Residual noise (main output fader at 0): < -90 dBu
Bus noise (8 input channels, muted, main output @ 0dB): < -80 dBu
Crosstalk/bleedthrough (all @ 20kHz): Adjacent channel: < -90 dB
Channel muted: < -90 dB
Channel to unassigned bus: < -90 dB
Phase : line in to main out: +30 to -30 degrees (20Hz to 20kHz)

SIGNAL LEVELS

Line input : -27dBu to +13dBu nominal
Aux Send : +4 dBu nominal
Bus Insert : +4 dBu nominal send/return
Maximum input : Channel input: +20dBu (10Vpk-pk sine)
Maximum output : Main output: > +18 dBu
Aux send: > +18 dBu

Backbone Signal Assignment

PositionSignalComment
1PFLSENSE-ABridge with 1k0 to enable PFL
2PFLSENSE-B
3PFLSIG+PFL audio send (mono)
4PFLSIG-
5AUX1+(Pre-Fade)
6AUX1-
7AUX2+(Pre-Fade)
8AUX2-
9AUX3+(Post-Fade)
10AUX3-
11AUX4+(Post-Fade)
12AUX4-
13B1+Bus #1
14B1-
15B2+Bus #2
16B2-
17B3+Bus #3
18B3-
19B4+Bus #4
20B4-
21R+Main R
22R-
23L+Main L
24L-
25REF0Reference
26REF0 [1]

[1] - Not carried across when using 25-way D-SUB connectors for inter-cabinet links

02.04.2016. 23:41