Calrec Hydra2, Installation Manual

Page: 83 / 104

CALREC
Putting Sound in the Picture
83
AL5870 – 2
X
MIC/LINE IN WITH SPLITS (XLR)
WIRING INFORMATION
Function Pin
Positive 2
Negative 3
Ground 1
2 1
3
2 1
3
Connector side
Female
Male
Wiring Side
2 1
3
2 1
3
The AL5870 provides 2 balanced
mic / line level analog inputs to the
Hydra2 network along with a pre-
gain analog “split” output for each
input in a 2 slot-wide module. Input
connectors are female XLR, outputs
are male XLR.
The pre gain analog split outputs are
active, irrespective of the Hydra2 interface
card status, as long as the rack is
powered.
Front panel LEDs indicate audio signal
presence for each input and split output,
lighting green for signals above -60dBFS.
Each input also has front panel LED
indicators which light red when 48V
phantom power is on.
This module supports phantom power
detection, allowing for power to the
mic input to be controlled by the device
being fed from the split output. This
feature is enabled per input / split using
PCB mounted DIP switches fitted to
the card. When active, if +24V DC or
greater is detected on a split output
(i.e. phantom power is being fed by the
device connected to the split), the card
will automatically switch its own phantom
power to the corresponding mic input. If
phantom power has been switched in this
way, the 48 V LED indicator will briefly
blink off approximately every two seconds.
The standard modular I/O status LED
flashes green once the card has booted
and lights solid green once a connection
between the card and the Hydra2
interface has been established.
FRONT PANEL VIEW
• Card input connectors are female,
requiring male terminated interface
cabling.
• Card Split output connectors are
male, requiring female terminated
interface cabling.
SPECIFICATION
Format Analog
Type
Balanced Mic/Line Level
Inputs 2
Outputs 2 (Pre-gain input splits)
Input Gain Range
-18 dB to +78 dB, remotely controlled per
input
Phantom Power
48 V remotely switchable per input
Input Impedance
2 k
Ω
@ Mic Level / 10 k
Ω
@ Line level
(auto-switching)
ADC 24 bit