Cadac M16 - Manual (Page 21)

3-7
Revision MA2005-7 M16 Microphone Amplifier
Phantom Power Switch: 48v
48v Phantom Power can be provided on each microphone channel
individually by enabling the 48v switch. When enabled, the 48v
switch will illuminate. To cancel Phantom Power, simply press the
48v switch again.
NOTE: Phantom Power provides up to 14mA load current per
microphone.
NOTE: Good operating practice is to Mute a particular channel
before enabling or disabling Phantom Power. This prevents the
potential for any audio thumps occurring.
High Pass Filter:
To enable the selected channel’s high pass filter to remove any low
frequency rumble, press the High Pass Filter switch. Once enabled,
the switch will illuminate. To deactivate the High Pass Filter, press
the switch again.
The High Pass Filter is fixed at 60Hz with a 12dB/octave slope.
3.5 Headphones
A headphone socket is provided on the M16 front panel. The head-
phone output is sourced from the PFL bus, therefore any PFL selec-
tion can be monitored on the headphones.
The headphone circuitry is designed to drive a load of 150 ohms up-
wards. Headphone impedances below 150 ohms can still be used,
however, the audio level will be reduced.
It is possible to bus link the PFL bus of multiple M16 units. See sec-
tion
3.7 Monitoring the PFL bus on multiple M16 units .
3.6 MADI Output
The M16 is provided with a MADI output connector as standard.
MADI (Multi-channel Audio Digital Interface) is a digital protocol that
enables multiple channels to be transmitted over a single coaxial ca-
ble or fibre optic link.
The M16 utilises the fibre optic link, therefore extending the available
transmission length to over 1000m, avoiding any radio frequency in-
terference issues that can occur with long cable runs of unbalanced
coaxial cable and also reducing the weight and size of the cable
drum.
Using MADI allows direct digital connection to a wide variety of dig-
ital audio consoles and digital audio workstations (DAWs) that are
commonly available today. Note, however, that some digital con-
soles, and DAWs, may require optional hardware in order to accept
an optical MADI data stream. Please check with the appropriate
manufacturer for further details.