Sound-devices 302 User Manual download pdf (Page 10)

302 User Guide and Technical Information

v. 3.6 Features and specifications are subject to change. Visit www.sounddevices.com for the latest documentation.

When possible, attempt to equalize at the sound source with microphone selection, use of

windscreens, microphone placement, and on-board microphone ﬁltering. Many microphones have

on-board high pass ﬁlters, and the high-pass ﬁlters on the 302 can be used in conjunction with the

microphone’s ﬁlters to increase the ﬁlter’s slope.

The high-pass ﬁlter is defeated when the switch is in the center position.

Pan Switches

The pan switches assign inputs to the output buses. Inputs can be sent to the left, right, or

both outputs equally. The 302 features excellent “off-attenuation” in the left and right

positions. With the use of the pan switches, separate mixes can be sent to the left and right outputs.

For example, a summed mono mix of all three inputs can be sent to the right output while an

isolated mix of only one input can be sent to the left output.

Input Limiters

The 302 Input Limiters act solely as “safety” limiters. Enabling the Output Limiters with the “LIM”

switch, located on the front panel, will also enable the Input Limiters. See Setup Menu to defeat the

Channel Limiters entirely.

In normal operation, with a properly set gain structure, the threshold of the Input Limiter will not

be reached. In the event of extremely high input signal levels, such as in high SPL environments, the

Input Limiter(s) will activate to prevent the input signal from clipping. Without the Input Limiters,

high signal conditions can overload the channel causing distortion.

Sound Devices recommends that the Input Limiters be engaged at all times. Input Limiters do not

effect audio below the set threshold (just below clipping) in any way. There is no user-selectable

adjustments to the Input Limiter’s threshold or its envelope.When Input Channels 1 and 2 are linked

as a stereo pair, the Input Limiters also are linked and perform the same gain reduction equally

across the channels.

LED

Each channel has an orange limiter LED which illuminates in proportion to the amount of

limiting. If the channel limiter LED illuminates substantially, reduce the amount of gain applied to

the channel by turning down the Gain (trim) pot.

Peak LED

Each channel has its own red Peak LED to indicate that the signal is 3 dB below the clipping level

of the respective channel. If the red Peak LED illuminates often, reduce the amount of gain applied

to the respective channel by turning down the Gain (trim) pot.

Polarity Reverse - Input 2

Engaging the Polarity Reverse Switch inverts the polarity of Channel 2. Polarity reversal is often

used to quickly reverse the stereo ﬁeld in MS recording. The normal position is OFF, with polarity

reversal occurring when the switch is in the position.

Be advised that an audible pop occurs when the polarity switch changes states.

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Sound-devices 302 User Manual Page 10