Sonifex S2 - Page 53

S2 User Handbook
41
S2CMM MIC/MIC CHANNEL WITH EQ
S2CMM MIC/MIC CHANNEL WITH EQ
6
frequency rumbles the LF response of the microphone can be rolled o, at 125kHz, 6dB per
octave, to reduce these acoustic problems. This is achieved by removing jumper J7.
Phantom Power Mic 2
If you will be using a phantom powered microphone, jumper J8 must be placed over pins 1
& 2. If a normal microphone is used the jumper should be left over pins 2 & 3. With phantom
power selected a voltage of +48V is applied to pins 2 & 3 of the XLR connector. The voltage
is applied through 6k8 resistors limiting the current to 14mA. The default setting is with the
jumper over pins 2 & 3.
Mic 2 LF Response
The default setting of J9 is with the jumper over pins 1 & 2 which gives a full LF response to
the microphone. However, if your studio is acoustically poor and suers from a lot of low
frequency rumbles the LF response of the microphone can be rolled o, at 125kHz, 6dB per
octave, to reduce these acoustic problems. This is achieved by removing jumper J9.
Enabling the Insert Point
The Insert point is useful for hooking up an outboard eects unit to be used with the
microphone. The insert send signal is always available as a line level balanced output. The
insert return signal is enabled by placing jumper J10 over pins 1 & 2. The default setting of
J10 is none (not tted).
Jumpers J11 and J12 are not tted to the Mic/Mic channel.
Mic Live Muting
The microphone inputs can be set to mute the control room or studio monitors. The default
setting of J13 over pins 1 & 2 will enable a live microphone on Mic 1 input to mute the
control room monitors. If it is required to mute the studio monitors the jumper should be
shifted to pins 2 & 3. If no muting is required, the jumper should be removed. Similarly, J15
sets the muting function for the microphone on Mic 2 input. A jumper over pins 1 & 2 will
mute the control room monitors and over pins 2 & 3 will mute the studio monitors. The
default setting of J15 is none (not tted).
Talkback Mic Selection
When the channel is enabled as a talkback MIC, the talkback input can be selected from
either MIC1 or MIC2 using J16. This is independent of the active MIC input. To enable the
microphone input to be added to the talkback bus, connect pins 7 (0V logic) and 9 (Talkback
mic enable) on the remote connector. This is useful if, for example, you want to use the mic
channel to talk to a caller connected to the cleanfeed output of the telco channel.
Presets
Two presets are available for adjustment of the input gain for mic 1 and mic 2 levels. Mic
1 preset, P1, and Mic 2 preset, P2, provide 59dB of gain adjustment, allowing an input
range of –7dB to –66dB. The presets should be adjusted to give 0dB output for the chosen
microphones in use. The level is preset for –50dB input when shipped.
Presets P5 & P6 are for altering the audio waveform symmetry (i.e. distortion). They are factory
set on nal test and should not be adjusted further.