ATI Audio MX200 - Manual (Page 7)

Audio Technologies Inc. 856-719-9900 [email protected] www. audio.com
Line
Outputs
The output stages, A9 and A10, utilize a unique active balanced output driver IC,
the SSM2142, The ICs sense whether the connected load is balanced and
floating or is unbalanced due to either side being grounded. A balanced output
load will be driven with equal and anti-phase levels on the HI and LO output
lines. An unbalanced (one side grounded) load will cause the driver IC to shut off
the signal output to the grounded side of the load and double the output level
applied to the other side, thus maintaining equal output to either type of load. The
output stage will drive loads of 600 ohms and higher. Nominal output is +4dBm
with clipping at +22dBm into balanced loads. Maximum output
at
clipping
is
reduced by 6dB when driving an unbalanced load, since the full output swing of
only one driver is available.
Output
Level
Switches
-­‐
MXS100
S11 and S12, located on the rear panel directly above their respective output
XLR connector individually insert a 54dB attenuator into the left or right output
line for nominal output at -50dBm microphone level.
Output
Level
Selector
-­‐
MX200C
and
MX200
Two internal jumper plugs located directly behind the output XLR connectors
select either full line level at +4dBm or attenuated microphone level at -50dBm.
Headphone
Output
Level
A front panel 1/4” TRS jack and thumbnail-adjust headphone gain control
provides an isolated stereo program output for headphones. The headphone
output provides 100mW to phones of up to 600-ohm impedance and reduced
levels into higher impedance phones.
Headphone
Program
/
Cue
Switch
-­‐
MXS100
only
A panel toggle switch allows selection of normal stereo program monitoring or
summed L+R into one side of the headset and an amplified CUE feed into the
other side. A rear panel external CUE input or a jumper plug programmed and
amplified pre-fader cue from any of the three mixer inputs may be fed into the
headphone CUE circuit. The external CUE input is a 2.5mm TS jack. The
external CUE feed should supply -10dBu (.25V) nominal level into 20Kohms. The
pre-fader cue jumper plugs are labeled CUE1, CUE2 and CUE3.