Extron electronic MIX 301 Reference Information, Front Panel Features, Specifications, Audio

Installation and Operation, cont’d

Front Panel Features

	1	2	3
		MTP SERIES
1	12	3	4

Figure 4 — MIX 301 front panel

1Power 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.

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.)

8 MIX 301 • Installation and Operation MIX 301 • Reference Information 9