Shure SCM262 User Manual

SCM262
Stereo Mixer
IMPORTANT SAFETY INSTRUCTIONS
1. READ these instructions.
2. KEEP these instructions.
3. HEED all warnings.
4. FOLLOW all instructions.
5. DO NOT use this apparatus near water.
6. CLEAN ONLY with dry cloth.
7. DO NOT block any ventilation openings. Allow sufficient distances for adequate ventilation and install in
accordance with the manufacturer’s instructions.
8. DO NOT install near any heat sources such as open flames, radiators, heat registers, stoves, or other
apparatus (including amplifiers) that produce heat. Do not place any open flame sources on the product.
9. DO NOT defeat the safety purpose of the polarized or grounding type plug. A polarized plug has two
blades with one wider than the other. A grounding type plug has two blades and a third grounding prong.
The wider blade or the third prong are provided for your safety. If the provided plug does not fit into your
outlet, consult an electrician for replacement of the obsolete outlet.
10. PROTECT the power cord from being walked on or pinched, particularly at plugs, convenience receptacles,
and the point where they exit from the apparatus.
11. ONLY USE attachments/accessories specified by the manufacturer.
12. USE only with a cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the
apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury
from tip-over.
13. UNPLUG this apparatus during lightning storms or when unused for long periods of time.
14. REFER all servicing to qualified service personnel. Servicing is required when the apparatus has been
damaged in any way, such as power supply cord or plug is damaged, liquid has been spilled or objects have
fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or
has been dropped.
15. DO NOT expose the apparatus to dripping and splashing. DO NOT put objects filled with liquids, such as
vases, on the apparatus.
16. The MAINS plug or an appliance coupler shall remain readily operable.
17. The airborne noise of the Apparatus does not exceed 70dB (A).
18. Apparatus with CLASS I construction shall be connected to a MAINS socket outlet with a protective earthing
connection.
19. To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.
20. Do not attempt to modify this product. Doing so could result in personal injury and/or product failure.
21. Operate this product within its specified operating temperature range.
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Publications

Shure SCM262 Specifications

General

Channels quantity	2 channels
Digital sound processing	- bit
AC input voltage	220 - 240 V
AC input frequency	50 - 60 Hz
Microphone in	Yes
Line inputs (RCA)	3
Number of microphone inputs	2
Microphone input impedance	1400 Ω
Total Harmonic Distortion (THD)	0.25 %
Type	Stereo Microphone Mixer
DJ mixer	-
Product color	Black, Grey
Rack capacity	0.5U

Weight and Dimensions

Depth	162 mm
Width	218 mm
Height	43 mm
Weight	1100 g

Summary

Important Safety Instructions

General Description

Product Features

Lists the key capabilities and design aspects of the SCM262 stereo mixer.

DIP Switch Settings

Applications

General Application Setup

Describes a general setup for integrating professional microphones with consumer stereo equipment.

Paging with Ducking Application

Explains how to use the ducking feature for paging with background music.

Jukebox Mute Application

Details how to use the Jukebox Mute feature to mute other audio sources.

Internal Modifications

Unit Disassembly

Provides step-by-step instructions for disassembling the SCM262 to access internal components.

Mono Mixer Modification

Enables mixing all inputs to a single mono signal for both left and right outputs.

Phantom Power Disable

Instructions for disabling phantom power for individual microphone channels.

15 dB Mic Preamplifier Pad

Adds a 15 dB pad for better gain adjustment with high-level microphone signals.

Hard Panning MIC Channels

Details how to remove MIC channels from specific left or right outputs.

Low-Cut Filter Modification

Explains how to eliminate or change the frequency of the low-cut filter.

Ducking Depth Modification

Adjusts the level of attenuation for input channels when ducking is activated.

Ducking Threshold Modification

Adjusts the threshold for activating the ducking circuit by modifying resistors.

Supplied Hardware

Rackmount Installation

Single Unit (Half-Rack) Installation

Instructions for mounting a single SCM262 unit in a half-rack configuration.

Dual-Mounted Installation

Steps for mounting two SCM262 units side-by-side in a rack.

Stand-Alone Installation

Fixed Installation Methods

Technical Specifications

Frequency Response

Details the frequency response characteristics for Mic/Line and Aux inputs.

Low-Cut Filter

Specifies the low-cut filter roll-off rate and frequency.

Total Harmonic Distortion

Indicates the THD level at a specified output level and frequency.

Equivalent Input Noise

Specifies the EIN for a 150-ohm balanced source, A-weighted.

Common Mode Rejection

Specifies the CMRR at 1 kHz.

Polarity

Describes the polarity of inputs to outputs (non-inverting).

Overload and Shorting Protection

Details protection against output shorting and input signal overload.

Equalization Specifications

Details Bass and Treble shelving equalization ranges and corner frequencies.

Ducking Specifications

Specifies ducking levels, activation, and deactivation times.

Phantom Power

Details the 12 Vdc phantom power output specifications.

Temperature Range

Specifies the operating and storage temperature ranges for the unit.

Dimensions

Provides the physical dimensions of the SCM262 stereo mixer.

Net Weight

Indicates the net weight of the SCM262 stereo mixer.

Voltage Gain

Lists input and output voltage gain values for Mic, Line, and Aux.

Input Specifications

Details impedance, designed use, and clipping levels for various inputs.

Output Specifications

Details impedance, designed use, and clipping levels for various outputs.

Replacement Parts