MIX 301 • Installation and Operation
Installation and Operation, cont’d
MIX 301 • Reference Information
Reference Information
Specifications
Audio
Gain ................................................ Adjustable per input. When all three gain
potentiometers are set to 12 o’clock, the
gain is as follows:
Unbalanced output: -6 dB
Balanced output: 0 dB
Frequency response .................... 20 Hz to 20 kHz, ±0.05 dB
THD + Noise ................................. 0.05% @ 1 kHz at nominal level
S/N ................................................ >90 dB, balanced, at maximum output
(unweighted)
CMRR ............................................ >70 dB @ 60 Hz to 20 kHz
Audio input
Number/signal type ................... 3 mono, balanced/unbalanced
Connectors ................................... (3) 3.5 mm captive screw connectors,
3 pole
Impedance .................................... >10k ohms unbalanced, DC coupled
Nominal level ............................... -10 dBV (316 mVrms) or +4 dBu (1.23
Vrms)
Maximum level ............................ >+18 dBV, (balanced or unbalanced) at 1%
THD+N
Input gain adjustment ................. Mute to +20 dB, adjustable per input
0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV 2 dBu
Audio output
Number/signal type ................... 1 mono, balanced/unbalanced
Connectors ................................... (1) 3.5 mm captive screw connector, 3 pole
Impedance .................................... 50 ohms unbalanced, 100 ohms balanced
Nominal level ............................... -10 dBV (316 mVrms) unbalanced, or
+4 dBu (1.23 Vrms) balanced, adjustable
Maximum level ............................ +25 dBu, balanced with 100k ohm load at
1% THD+N
+18 dBm balanced with 600 ohm load at
1% THD+N
General
External power supply ................ 100 VAC to 240 VAC, 50/60 Hz, external,
autoswitchable; to 12 VDC, 1 A, regulated
Power input requirements ......... 12 VDC, 0.2 A (max.)
Front Panel Features
123
MTP SERIES
1
1
2
3
4
Figure 4 — MIX 301 front panel
1
Power LED — Lights green to indicate that the MIX 301
has power.
2
3
4
Input channel audio gain controls — Adjusts the audio
input gain for each input. The gain is adjusted by rotating
the screw and the adjustment range is from mute (fully
counterclockwise) to +20 dB (fully clockwise). See the note
below.
Unity gain (0 dB) for each input channel is around the
12 o’clock (vertical) position with the potentiometer
adjustment screws vertically aligned with the indicator
dots, as shown here:
1
2
3
The potentiometers of the MIX 301 are set precisely to
unity gain at the factory. Once an adjustment screw is
turned, test equipment will be required to accurately
reset the potentiometer to unity gain.
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