Shure SCM262E User manual

Model SCM262E User Guide
©2008 Shure Incorporated
27AS8879 (Rev. 3)
Printed in U.S.A.
SCM262E
STEREO MIXER
立体声混音器


3
! 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. Install in accordance with the manu-
facturer's instructions.
8. DO NOT install near any heat sources such as radiators, heat registers, stoves,
or other apparatus (including amplifiers) that produce heat.
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 out-
let, 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.
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 dam-
aged, 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.
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.
This symbol indicates that dangerous voltage constituting a
risk of electric shock is present within this unit.
This symbol indicates that there are important operating and
maintenance instructions in the literature accompanying this unit.
WARNING:
Voltages in this equipment are hazardous to life. No user-serviceable parts inside. Refer all servicing to qualified service personnel. The
safety certifications do not apply when the operating voltage is changed from the factory setting.
WARNING: This product contains a chemical known to the State of California to cause cancer and birth
defects or other reproductive harm.

4
SHURE SCM262
DESCRIPTION
The Shure Model SCM262 is a stereo mixer intended for sound rein-
forcement applications that integrate microphones with consumer stereo
products. It incorporates two active-balanced microphone inputs with
three unbalanced stereo aux level inputs.
The SCM262 Stereo Mixer is designed for restaurants, classrooms,
corporate training, aerobics classes, and other situations where a paging/
public announcement system is combined with background music or oth-
er program material.
FEATURES
• Designed to combine paging with background music.
• One active-balanced, XLR microphone input channel.
• One active-balanced XLR microphone and 1/4-in. TRS line in-
put channel.
• Three STEREO INPUT channels
• Stereo AUX level OUTPUTs
• Stereo MIC/LINE OUTPUTs
• BASS and TREBLE tone controls on the master output.
• 1/2-rack chassis.
• 12 V phantom power for condenser microphones.
• Internal power supply.
• Removable power cable.
• Ducking function (defeatable).
• Jukebox mute function (defeatable).
FRONT PANEL
MIC Channel Gain Controls, 1-2. Control the gain levels
of the MIC channels and LINE IN 2 (MIC 2).
STEREO Channel Gain Controls, 1-3. Control the gain
levels from CD players, juke boxes, VCRs, or other con-
sumer stereo equipment connected to the STEREO inputs.
BASS and TREBLE Controls. Control the boost/cut of the
low- and high-frequency of the shelving filters.
MASTER Gain Control. Allows adjustment of the overall
output gain.
POWER Indicator. Lights up to indicate when the unit is
plugged in and receiving power.
NOTE: The SCM262 does not have a power switch. To turn
the unit off, unplug the power cord or use an external power
strip with a switch. However, it can remain plugged in as it uses
very little power when idle.
REAR PANEL
Power Connector. Accepts 100-120 Vac (SCM262) or
220-240 Vac (SCM262E).
Left/Right MIC/LINE Output Connectors. These 1/4-in.
connectors are stereo, balanced outputs for use with pro-
fessional audio equipment. Controlled by DIP switch.
Left/Right AUX Output Connectors. These phono jacks
are stereo, unbalanced outputs for use with consumer ste-
reo equipment.
DIP Switches. These allow you to adjust the SCM262 for
specific applications. See DIP Switches.
Left/Right STEREO INPUTS, 1-3. These phono jacks are
stereo inputs for connection to consumer stereo devices.
MIC Channel 2 INPUT. Microphone channel 2 has two
available inputs. There is a 1/4-in. connector for balanced/
unbalanced line-level connections, or an XLR connector for
balanced mic-level connections.
MIC Channel 1 INPUT. This is an XLR connector for bal-
anced mic-level connections.
1 2 3 4 5
1
2
3
4
5
1 2 3 4 5 6 7
1
2
3
4
5
6
7

5
DIP SWITCHES
LEFT/RIGHT OUTPUT MIC/LINE:
DIP switches 1 and 2 adjust the left
and right outputs for line- or mic-level operation.
MIC 1/MIC 2 Ducking:
When ducking is on, the SCM262 will automat-
ically lower the gain of all STEREO inputs when someone is speaking into
one of the microphones.
DUCKING LEVEL:
Adjusts the amount of STEREO channel gain re-
duction when ducking is activated.
STEREO 3 JUKEBOX MUTE:
This DIP switch turns the Juke Box
Mute feature on or off. When on, any source connected to STEREO 3 will
mute STEREO 1 and 2 inputs.
PHANTOM POWER:
When in the down position, this switch activates
a 12 V phantom power source for condenser microphones. Phantom
power does not affect the operation of balanced, dynamic microphones,
so one can be connected to the SCM262 in combination with a condenser
microphone.
APPLICATIONS
General Application
This is a general setup for most situations which require the combined
use of professional microphones and consumer stereo equipment. Using
this general setup, there are several other options available for further ad-
justing the SCM262 for your sound system. See the diagram on the fac-
ing page.
1. Turn all gain controls counterclockwise.
2. Connect L/R STEREO INPUTS of the SCM262 to the L/R stereo
outputs of the desired stereo audio equiment (CD players, VCRs,
televisions, juke boxes, etc.).
3. Connect microphone(s) to the MIC INPUTS on the SCM262.
4. For microphones which require phantom power, such as con-
denser microphones, place DIP switch 7 in the down position
(phantom power on).
5. Connect the L/R outputs of the SCM262 to the L/R inputs of the
amplifier.
NOTE: If you are using a consumer stereo amplifier, use the
AUX OUTs. If you are using a professional audio power
amplifier, use the LINE OUTs. The MIC/LINE and AUX
OUTPUTs can be used simultaneously to feed two separate
amplifiers.
6. Apply power to the mixer by connecting the supplied power cable
between the power connector on the mixer and the appropriate
AC power supply. The green POWER LED will illuminate to indi-
cate that the mixer is powered on.
NOTE: The SCM262 has no power switch. It is designed to
be plugged into a power strip which supports the whole sound
system. A typical power strip will have a power switch, so that
when the power strip is powered on, the SCM262 is powered
on.
Paging with Ducking Application
With Ducking on, the SCM262 will automatically sense when someone
is talking into one of the microphones and lower the volume of the music
so the talker can be heard more clearly. Once the talker is finished, the
music resumes.
NOTE: Use a microphone with an ON/OFF or pushbutton
switch for the Paging with Ducking Application. A microphone
without a switch will false-trigger, causing unwanted
interruptions in the program material.
1.
Connect the SCM262 to the sound system as described in
Gen-
eral Application.
2. Set DIP switch 3 or 4 to the down position to activate ducking for
microphone channel 1 or 2, respectively.
3.
Set DIP switch 5 position. The
Down position sets the ducking so
that the program sound is lowered 20 dB when someone uses a
microphone. The Up position sets the ducking so that the pro-
gram sound is muted when someone uses a microphone.
Jukebox Mute Application
In this application, designed primarily for Jukeboxes, any sound
source connected to the STEREO 3 channels will automatically mute any
sound coming over the STEREO 1 and 2 channels. This way, a CD play-
er can be playing music, and then when someone plays a song on the
Jukebox, the SCM262 will automatically mute the CD player channels
and switch to the Jukebox. STEREO 1 and 2 channels will remain muted
for about 30 seconds after program material is finished, to allow the juke-
box time to move on to the next song.
1.
Connect the SCM262 to the sound system as described in
Gen-
eral Application.
2. Connect the L/R audio outputs of the jukebox to the L/R inputs of
STEREO 3.
NOTE: This feature is designed especially for use with
jukeboxes, but will work for any equipment connected to
STEREO 3.
3. Set DIP Switch 6 to the down position (Jukebox Mute on).
NOTE: If the ducking application is used in conjunction with the
Jukebox Mute application, then activated microphones will
mute or duck the STEREO 3 input.
DIP
SWITCH
FUNCTION POSITION
UP (default) DOWN
1 LEFT OUTPUT MIC/LINE Line Mic
2 RIGHT OUTPUT MIC/LINE Line Mic
3 MIC 1 DUCKING Off On
4 MIC 2 DUCKING Off On
5 DUCKING LEVEL –∞–20 dB
6 STEREO 3 JUKEBOX MUTE Off On
7 12 V PHANTOM Off On
LINE
LINE
OFF
OFF
OFF
OFF
-∞
MIC
MIC
ON
ON
ON
ON
-
20
LOUTPUT
ROUTPUT
MIC 1 DUCKING
MIC 2 DUCKING
DUCKING LEVEL (dB)
ST. 3 JUKEBOX MUTE
12 V PHANTOM
DOWN
UP
12346
57

6
CONNECTIONS
MIC INPUT 2
WIRELESS MICROPHONE SYSTEM MIC INPUT 1
MICROPHONE
AUX INPUT 3
JUKEBOX
AUX INPUTS
AUX INPUTS
L/R AUX OUTPUTS
L/R MIC/LINE
OUTPUTS VIDEO CAMERA
POWER SUPPLY
PROFESSIONAL
AUDIO POWER
AMPLIFIER
CONSUMER
STEREO
AMPLIFIER
LOUDSPEAKERS LOUDSPEAKERS
OR
OR
CD PLAYER
AM/FM RECEIVER
TAPE DECK
TELEVISION
VCR
LR
LR
OR
OR
TAPE DECK
VCR
L
R
L
R
LR
OR OR

7
INTERNAL MODIFICATIONS
DISASSEMBLY
To access the printed circuit board (pc board) for internal modifica-
tions, use the following steps:
1. Unplug the power cord.
2. Remove the knobs and retainer nuts from the front panel.
3. Remove the two screws at each bottom corner of the front panel.
4.
Remove the four screws at each corner of the
back panel.
5. Slide the back panel and pc board out from the rear of the chas-
sis.
CAUTION: When reassembling the SCM262, DO NOT
OVERTIGHTEN the knob retainer nuts. Use a minimal amount
of force to secure the nut (0.6-0.8 N⋅m (5-7 in⋅lb)). Damage to
the internal components will result if too much force is used.
Mono Mixer Modification
This modification allows all the inputs to be mixed to a single mono sig-
nal sent over both the left and right outputs.
Short jumper X203.
Phantom Power Disable
This modification disables the phantom power per channel.
To disable the phantom power from mic 1, remove resistor R121. To
disable the phantom power from mic 2, remove resistor R122.
15 dB Mic Preamplifier Pad
When a microphone has an extremely high signal, getting the desired
gain might be difficult -- a small turn of the gain control might change the
sound from a whisper to deafeningly loud. This modification adds a 15 dB
Mic preamplifier pad to allow more accurate gain adjustment with ex-
tremely high microphone signals.
Remove R160 (mic 1) or R183 (mic 2).
Hard Panning MIC Channels
To remove MIC 1 from the left outputs, remove R912. To remove MIC
1 from the right outputs, remove R913.
To remove MIC 2/LINE 2 from the left outputs, remove R910. To re-
move MIC 2/LINE 2 from the right outputs, remove R911.
Low-Cut Filter
To eliminate the 80 Hz, low-cut filter, remove resistor R501 (mic 1), or
resistor R519 (mic 2). Place a 10 to 33
μ
F capacitor in X501 (mic 1) or
R502 (mic 2). The polarity of the capacitor does not matter.To change the
frequency of the low cut filter, remove resistor R501 (mic 1) or R519 (mic
2), and place the proper capacitor into X501 (mic 1) or X502 (mic 2) to get
the desired corner frequency.
The following tables list the low-cut frequency corners for some of the
most common capacitor values:
Ducking Depth
This modification adjusts the level of ducking depth attenuation of the
input channels when ducking is activated.
The aux ducking depth may be changed by removing resistor R213
and inserting a resistor into jumper X202. Use the following tables to de-
termine the proper resistor value for the desired ducking depth.
Ducking Threshold
This modification adjusts the threshold for activating the ducking
circuit.
The ducking threshold can be raised or lowered by first removing re-
sistor R333, and then placing a resistor (R) at jumper X303. To lower the
ducking threshold, use a resistor value (R) less than 2k ohms. To raise
the ducking threshold, use a resistor value (R) greater then 2k ohms.
WARNING! Voltages in this equipment are hazardous to life. No user-serviceable parts
inside. Refer all servicing and modifications to qualified service personnel.
Capacitor
Value
Corner
Frequency
Capacitor
Value
Corner
Frequency
.033 μF 803 Hz .33 μF80Hz
.047 μF 564 Hz .47 μF56Hz
.068 μF 390 Hz .68 μF39Hz
.1 μF 265 Hz 1.0 μF26.5Hz
.22 μF 120 Hz 2.2 μF12Hz
Ducking
Depth
Resistor
Value
Ducking
Depth
Resistor
Value
6 dB 4,000 Ω36 dB 20,000 Ω
9 dB 5,000 Ω42 dB 25,000 Ω
15 dB 7,500 Ω47 dB 30,000 Ω
20 dB 10,000 Ω50 dB 33,000 Ω
24 dB 12,000 Ω55 dB 40,000 Ω
29 dB 15,000 Ω

8
INSTALLATION
SUPPLIED HARDWARE
•
4 rubber feet.
For stand-alone installation.
•
1 rackmount bracket, long.
For half-rack (single unit) instal-
lations.
•
1 rackmount bracket, short.
For half-rack (single) or du-
al-mount installations.
•
2 straddle brackets.
For dual-mount or fixed installations.
•
12 bracket screws,
1
/
4
-in. (6 mm).
For securing the brackets
to the chassis.
•
4 rackmount screws, 1 in. (2.5 cm).
For mounting the unit in
a rack.
•
4 plastic washers.
For use with the supplied rackmount
screws.
•
4 wood screws, 1/2 in. (1.25 cm).
For fixed installations
RACKMOUNT INSTALLATION
The SCM262 can be mounted as a single unit or dual-mounted with ei-
ther another SCM262 or another Shure half-rack unit such as the
SCM268 or DFR11EQ. Attach the rackmount brackets using one of the
following methods:
Single unit (half-rack) installation:
1. Attach the short and long rackmount brackets to the SCM262 with
eight (8) of the supplied bracket screws.
Dual-mounted installation:
2. Connect the two units together side-by-side using two (2) straddle
brackets. The brackets should straddle the recessed edges on on
the top and bottom of each chassis. Fasten them using eight (8)
bracket screws.
NOTE: Be sure to use both straddle brackets-one on the top
and one on the bottom.
3. Attach the short rackmount brackets to the outsides of the com-
bined units with eight (8) of the bracket screws.
4. After attaching the brackets, mount the unit in an equipment rack
using the supplied rackmount screws and plastic washers.
STAND-ALONE INSTALLATION
5. Adhere the four (4) supplied rubber feet to the bottom of the unit
at each corner. This will keep it from sliding and protect the table
surface.
FIXED INSTALLATION
To permanently affix the SCM262 above or below a table, shelf, or
counter top, use the following steps:
1. Fasten the straddle brackets to the recessed edges of the chassis
using four (4) bracket screws.
Top mount: Fasten the straddle brackets to on the bottom of the unit
Hanging mount: Fasten the straddle brackets to the top of the unit.
2. Fasten the straddle brackets to the surface using the four (4) sup-
plied wood screws.
TOP MOUNT
HANGING MOUNT
Wood Screw
Rackmount Screw
Bracket Screw

9
SPECIFICATIONS
Measurement Conditions (unless otherwise specified):Tone controls
centered; Line voltage 120 Vac, 60 Hz (SCM262) or 230 Vac, 50 Hz
(SCM262E);
full gain; 1 kHz, one channel activated;
source impedances:
Mic 150
Ω
; Line/Aux 40
Ω
, terminations: Line/Mic/Aux 20 k
Ω.
Frequency Response (Ref 1 kHz, channel and master
controls centered)
MIC/LINE Inputs: 150 Hz to 20 kHz ±2 dB
AUX Inputs: 20 Hz to 20 kHz ±2 dB
Low-Cut Filter (Microphone inputs only)
3dB down at 80 Hz, 6 dB/octave
Voltage Gain (typical, controls full clockwise)
Inputs
Outputs
Total Harmonic Distortion
<0.25% at +4 dBu output level, (through 22 Hz—22 kHz filter;
MIC Input 1 and Master at center, all other controls full coun-
terclockwise)
Equivalent Input Hum and Noise (150 W source; 22 Hz—
22 kHz)
–125 dBV
Output Hum and Noise (22 Hz—22 kHz; channel controls full
counterclockwise)
Master full counterclockwise ................................–85 dBV
Master full clockwise ............................................–60 dBV
Common Mode Rejection
>70 dB at 1 kHz
Polarity
All inputs to all outputs are non-inverting.
Overload and Shorting Protection
Shorting outputs, even for prolonged periods, causes no
damage. Microphone inputs are not damaged by signals up
to +10 dBV; Line and Aux inputs by signals up to +28 dBV
Equalization
Bass (Low-frequency shelving,
corner frequency at 250 Hz) ......................................±6 dB
Treble (High-frequency shelving,
corner frequency at 4 kHz).........................................±6 dB
Ducking
Mic channels 1 and 2 Levels.................. –20 dB or –∞dB
Activation time ........................................... 10 ms (typical)
Mic Deactivation time...................................... 2 s (typical)
Jukebox Mute Deactivation Time.................. 30 s (typical)
Phantom Power
12 Vdc open-circuit through 680 Ωresistors
Operating Voltage
SCM262: 100—120 Vac, 50/60 Hz, 60 mA
SCM262E: 220—240 Vac, 50/60 Hz, 30 mA
Temperature Range
Operating ............................–7°to 49°C (20°to 120°F )
Storage ..............................–29°to 74°C (–20°to 165°F)
Overall Dimensions
43 x 218 x 162 mm (1.72 x 8.60 x 6.37 in.)
Net Weight:1.1 kg (2 lbs, 5 oz)
Certifications
SCM262: UL, cUL listed by Underwriters Laboratories.
SCM262E: Conforms to European Union directives, eligible
to bear CE marking; VDE GS-Certified to EN 60 065; meets
European Union EMC Immunity Requirements (EN 50082-1:
1992, EN 50082-2: 1992).
Replacement Parts
Knob, Master (blue) .......................................... 95B8752
Knob, Channel Gain (white).............................. 95A8752
Line (Power) Cords:
SCM262: 100—120 Vac (US/Canada) ......... 95A8762
SCM262E: 220—240 Vac (EU)..................... 95A8778
SCM262E: 230 Vac (Australia/New Zealand)95A9128
Fuse:
SCM262 (5x20 mm, 250V,
100mA, time delay) ....................................... 80B730
SCM262E (5x20 mm, 250V,
40mA, time delay)...........................................80J258
Hardware Kit ...................................................90AF8100
Link Bars (Bracket) ........................................... 53A8443
Single Mount Bracket........................................ 53A8484
Dual Mount Bracket ......................................... 53B8484
Optional Accessories
Line (Power) Cord, 230—240 Vac (UK)............ 95A8713
Service Statement
For additional service or parts information, please contact
Shure's Service department at 1-847-600-8699. Outside the
United States, please contact your authorized Shure Service
Center.
Output
Input Mic Line Aux
Low-impedance mic
(150 Ω)
32 dB 72 dB 60 dB
Line –9 dB 31 dB 19 dB
Stereo –5 dB 35 dB 23 dB
Impedance
Input
Designed
for use with
Actual
(typical)
Input
Clipping Level
Mic (XLR) <600 Ω1.4 kΩ–16 dBV
Line <10 kΩ155 kΩ+24 dBV
Stereo <2 kΩ21 kΩ>28 dBV
Impedance
Output
Designed for
use with
Actual
(typical)
Output
Clipping Level
Mic > 600 Ω3 Ω–22 dBV
Line >5k Ω300 Ω+18 dBV
Aux ≥10 kΩ1.5k Ω+5 dBV
N108

10
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11
SHURE SCM262E
说明
Shure
型号
SCM262E
是一种立体声混音器,专门用于同时需要麦克风
和消费级立体声产品的扩音场合。
该设备包括了两个有源平衡麦克风输入
和三个非平衡立体声辅助电平输入。
SCM262E
立体声混音器设计用于餐馆、教室、企业培训、有氧运动健
身课和其它结合了寻呼
/
公共广播系统和背景音乐等播放内容的场合。
特性
ï
设计为能够将寻呼与背景音乐功能相结合。
ï
一个有源平衡
XLR
麦克风输入频道。
ï
一个有源平衡
XLR
麦克风和
1/4
英寸
TRS
线路输入频道。
ï
三个立体声输入频道。
ï
立体声辅助电平输出。
ï
立体声麦克风
/
线路输出。
ï
可以对主输出进行低音和高音音调控制。
ï
1/2
机架。
ï
用于电容麦克风的
12
伏幻象电源。
ï
内置电源。
ï
可拆卸式电源线。
ï
突降功能 (可停用)。
ï
点唱机静音功能 (可停用)。
前面板
麦克风频道增益控制器,1-2。用于控制麦克风频道和线路
输入 2 (MIC 2) 的增益电平。
STEREO ( 立体声 ) 频道增益控制器, 1-3。用于控制连接
到立体声输入的 CD 播放机、点唱机、录像机等其它消费级
立体声设备。
BASS ( 低音 ) 和TREBLE ( 高音 ) 控制器。用于控制倾斜滤
波器的低频和高频升高 /降低。
MASTER ( 主) 增益控制器。用于调节整体输出增益。
POWER ( 电源 ) 指示灯。亮起表示已经插上电源插头并且已
经接通电源。
注释:SCM262E 没有电源开关。要将设备电源关闭,可拔下
电源插头或使用带有开关的外置电源接线板。但是,您可以让
电源插头保持接通,因为它在待机状态下的功率很低。
后面板
电源接头。可接受 100-120 伏交流 (SCM262) 或220 伏交
流(SCM262E) 电源。
左/右MIC/LINE ( 麦克风 /线路 ) 输出连接器。这些 1/4 英
寸连接器是是用于专业音响设备的立体声平衡输出。由DIP
开关控制。
左/右AUX ( 辅助 ) 输出连接器。这些 Phono 插孔是用于消
费级立体声设备的立体声非平衡输出。
DIP 开关。这些开关能够让您将 SCM262E 调节为符合特定
规格。请参见 DIP
开关
。
左/右STEREO INPUTS ( 立体声输入 ),1-3。这些 Phono
插孔是用于连接到消费级立体声设备的立体声输入。
麦克风频道 2 输入。麦克风频道 2 具有两个可用输入。此设
备具有一个用于平衡 /非平衡线路电平连接的 1/4 英寸连接
器,或一个用于平衡麦克风电平连接的 XLR 连接器。
麦克风频道 1 输入。这是一个用于平衡麦克风电平连接的
XLR 连接器。
5
1 2 3 4 5
1
2
3
4
5
1 2 3 4 5 6 7
1
2
3
4
5
6
7

12
DIP 开关
左
/
右输出麦克风
/
线路:
DIP
开关
1
和
2
调节线路或麦克风电平操作
的左右输出。
麦克风
1/
麦克风
2
突降:
如果打开突降功能,
SCM262E
将在有人向
其中一个麦克风讲话时自动降低所有 “立体声”输入的增益。
突降电平:
调节在启动突降时 “立体声”频道增益的降低程度。
立体声
3
点唱机静音:
该
DIP
开关用于打开或关闭 “点唱机静音”功
能。
当开关处于 “开”状态时,任何连接到 “立体声
3
”的音源将使立体
声
1
和
2
输入静音。
幻象电源:
位于向下位置时,此开关为电容麦克风启动
12
伏幻象电
源。
幻象电源不会影响平衡动态麦克风的工作,因此可以将其与电容麦克
风一起连接到
SCM262E
。
应用场合
一般应用
这是一个通用设置,适用于需要同时使用专业级麦克风和消费级立体
声设备的大多数场合。
使用这一通用设置,您还可以根据所使用的音响系
统使用几个其它选项对
SCM262E
进行进一步调节。
请参见正面页上的示
意图。
1. 逆时针旋转所有增益控制器。
2. 将SCM262E 的“左/右立体声输入”连接到所需立体声音频设
备(CD 播放机、录像机、电视、点唱机等)的左 /右立体声输
出。
3. 将麦克风连接到 SCM262E 上的 “麦克风输入”。
4. 对于电容麦克风等需要幻象电源的麦克风,应将 DIP 开关 7 置于
向下位置 (幻象电源打开)。
5. 将SCM262E 的左 /右输出连接到放大器的左 /右输入。
注释:如果使用消费级立体声放大器,应使用 “辅助输出”。
如果使用专业级音频功率放大器,应使用线路输出。可以同时
使用 “麦克风 /线路”和 “辅助输出”为两个独立放大器提供
信号。
6. 用电源缆线将适合的交流电源连接到混音器的电源连接器,为混音
器加电。绿色的 “电源指示灯”点亮表示混音器电源已经打开。
注释:SCM262E 没有电源开关。此设备设计为直接插入能够
支持整个音响系统的电源接线板。一般的电源接线板都配有电
源开关,因此当打开电源接线板电源时,也就接通了
SCM262E 的电源。
使用突降功能的寻呼应用
在“突降”功能打开情况下,
SCM262E
会自动检测是否有人朝其中一
个麦克风说话,并且会降低音乐音量,让讲话者的声音更为清晰。
讲话结
束后,音乐将恢复。
注释:可以在
使用突降功能的寻呼应用
中使用一个带双位开关
或按钮开关的麦克风。不带开关的麦克风会发生错误触发情
况,导致播放内容的意外中断。
1.
根据
一般应用
中的说明将 SCM262E 连接到音响系统。
2. 将DIP 开关 3 或4 置于向下位置,分别为麦克风频道 1 或2 启用
突降功能。
3.
设置
DIP
开关
5
位置。
向下位置可将突降功能打开,这样可以在
有人使用麦克风时,将背景音乐的音量降低到 20 dB。向上位置可
将突降功能设置为在有人使用麦克风时,将背景音乐静音。
点唱机静音应用
在此应用中,主要设计为用于点唱机,任何连接到“立体声
3
”的音源
都会将来自立体声
1
和
2
频道的声音静音。
使用这种方式,可以使用
CD
播放机播放音乐,当在有人在点唱机上唱歌时,
SCM262E
会将
CD
播放
机频道自动静音,并切换至“点唱机”。
立体声
1
和
2
频道将在背景音乐
完成后保持静音
30
秒,以让点唱机播放下一首曲目。
1.
根据
一般应用
中的说明将 SCM262E 连接到音响系统。
2. 将点唱机的左 /右音频输出连接到立体声 3 的左 /右输入。
注释:此功能设计为专门用于点唱机,但是也可以将其用于连
接到立体声 3 的任何设备。
3. 将DIP 开关 6 至于向下位置 (点唱机静音功能打开)。
注释:如果同时使用突降应用和点唱机静音应用,则打开的麦
克风将使立体声 3 静音或音频突降。
DIP 开关 功能 位置
向上 (默认) 向下
1LEFT OUTPUT MIC/LINE ( 左输出麦克
风/线路 )
线路 麦克风
2RIGHT OUTPUT MIC/LINE ( 右输出麦
克风 /线路 )
线路 麦克风
3MIC 1 DUCKING ( 麦克风 1 突降 )关开
4MIC 2 DUCKING ( 麦克风 2 突降 )关开
5DUCKING LEVEL ( 突降电平 )–∞–20 dB
6STEREO 3 JUKEBOX MUTE ( 立体声
3 点唱机静音 )
关开
712 V PHANTOM (12 伏幻象 )关开
LINE
LINE
OFF
OFF
OFF
OFF
-∞
MIC
MIC
ON
ON
ON
ON
-
20
LOUTPUT
ROUTPUT
MIC 1 DUCKING
MIC 2 DUCKING
DUCKING LEVEL (dB)
ST. 3 JUKEBOX MUTE
12 V PHANTOM
DOWN
UP
12346
57

13
连接
麦克风输入 2
无线麦克风系统 麦克风输入 1
麦克风
辅助输入 3
点唱机
辅助输入
辅助输入
左/右辅助输出
左/右麦克风 /线
路输出 摄像机
电源组件
专业级
音频功率放大器
消费级
立体声放大器
扬声器 扬声器
或
或
CD 播放机
中波 /调频接收机
磁带卡座
电视
录像机
左右
左右
或
或
磁带卡座
录像机
左
右
左
右
左右
或或

14
安装
附带硬件
ï
4
个橡胶支脚。
用于独立安装。
ï
1
个设备安装支架,长型。
用于半高 (单件)安装。
ï
1
个设备安装支架,短型。
用于半高 (单件)或双件安装。
ï
2
个跨装支架。
用于双件安装或固定安装。
ï
12
个
1/4
英寸 (
6
毫米)支架螺钉。
用于将支架固定到机架。
ï
4
个
1
英寸 (
2.5
厘米)支架安装螺钉。
用于将设备安装在支
架上。
ï
4
个塑料垫圈。
适用于附带的支架安装螺钉。
ï
4
个
1/2
英寸 (
1.25
厘米)木螺钉。
用于固定式安装
机架安装
可以将
SCM262E
以单件设备形式安装,也可以将其与另一台
SCM262E
或者
SCM268
或
DFR11EQ
等其它
Shure
半高设备一起安装。
使用下列方法固定安装机架:
单件设备 (半高)安装:
1. 使用八 (8) 个附带的螺钉将短型或长型安装机架固定到
SCM262E。
双件安装:
1. 使用两 (2) 个跨装支架将两件设备并排连接。支架可以跨接在每个
机架顶部和底部的凹入边缘上。使用八个 (8) 支架螺钉固定设备。
注释:
确保使用了两个跨接支架,一个位于顶部,一个位于底部。
2. 使用八 (8) 个支架螺钉将
短型
安装支架固定到组合单元的外侧。
3. 在固定支架后,使用附带的机架安装螺钉和塑料垫圈将设备安装在
设备机架中。
独立安装
1. 将四 (4) 个附带的橡胶支脚固定到设备底部的四个脚上。它能够防
止设备滑动并保护桌子表面。
固定安装
如果想要将
SCM262E
固定在桌子、支架或柜台顶部,应执行以下步
骤:
1. 使用四个 (4) 支架螺钉将跨接支架固定到机架的凹入边缘。
顶部安装:将跨接支架固定到设备单元底部。
悬吊安装:将跨接支架固定到设备单元顶部。
2. 使用附带的四 (4) 个木螺钉将跨接支架固定到表面。
顶部安装
悬吊安装
木螺钉
机架安装螺钉
支架螺钉

15
规格
测量条件(除非另有说明):
音调控制器居中;线路电压
120
伏交流,
60
赫兹
(SCM262)
或
220
伏交流,
50
赫兹
(SCM262E)
;满增益;
1
千
赫,启动一个频道;
源极阻抗:
麦克风
150
Ω
;线路
/
辅助
40
Ω
,
终结:
线路
/
麦克风
/
辅助
20 k
Ω
。
频率响应 (基准 1 千赫,频道和主控制器居中)
麦克风 /线路输入:150 赫兹 至20 千赫 ±2 dB
辅助输入:20 赫兹 至20 千赫 ±2 dB
低切滤波器 (仅麦克风输入)
80 赫兹 下降低 3dB,6 dB/ 频程
电压增益 (典型值为将控制器顺时针旋转到底)
输入
输出
总谐波失真
在+4 dBu 输出电平下为 <0.25%,(通过 22 Hz—22 kHz 滤
波器;麦克风输出 1 和主控制器居中,所有其它控制器逆时
针旋转到底)
等效输入交流声和噪声 (150 W 音源; 22 赫兹 —22 千赫)
–125 dBV
输出交流声和噪声(22 赫兹 至22 千赫,频道控制器逆时针旋到
底)
主控制器逆时针旋转到底 .....................................–85 dBV
主控制器顺时针旋转到底 .....................................–60 dBV
共模抑制
1 千赫 时> 70 dB
极性
所有输入到所有输出均不可反相。
过载和短路保护
将输出短接,即使时间较长,也不会导致任何损害。+10 dBV
伏以下的信号不会损害麦克风输入。 +28 dBV 以下的信号不
会损害线路和辅助输入。
均衡
低音 (低频倾斜,
250 赫兹 下的转角频率).............................................. ±6 dB
高音 (高频倾斜,
4 千赫 下的转角频率)................................................... ±6 dB
突降
麦克风频道 1 和2 电平 ...........................–20 dB 或–∞dB
启用时间.............................................. 10 毫秒 (典型值)
麦克风停用时间.........................................2 秒 (典型值)
点唱机静音停用时间................................ 30 秒 (典型值)
幻象电源
通过 680 Ω电阻的 12 伏直流开电路
工作电压
SCM262E:220—240 伏交流, 50/60 赫兹, 30 毫安
温度范围
工作状态下........................–7°至49°C (20°至120°F)
存放状态下....................–29°至74°C (–20°至165°F)
整体尺寸
43 x 218 x 162 毫米 (1.72 x 8.60 x 6.37 英寸)
净重:1.1 公斤 (2 磅.5 盎司)
认证
SCM262E:符合中国安全标准(GB8898-2001、GB13837-
2003、GB17625.1-2003)。 允许带有 CCC 标志。
备件
旋钮,主控制器 (蓝色).................................. 95B8752
旋钮,频道增益 (白色).................................. 95A8752
线路 (电源)线:
SCM262:100—120 伏交流
(美国 /加拿大)............................................ 95A8762
SCM262E:220—240 伏交流 (中国)....... 95B9073
保险丝:
SCM262 (5x20 毫米, 250 伏,
100 毫安,延时)........................................... 80B730
SCM262E (5x20 毫米, 250 伏,
40 毫安,延时)..............................................80J258
硬件套件 .........................................................90AF8100
连接杆 (支架)................................................. 53A8443
单件安装支架 .................................................... 53A8484
双件安装支架 .................................................... 53B8484
可选配附件
电源线, 230—240 伏交流 (英国适用).......... 95A8713
服务声明
有关其它服务或部件信息,请与 Shure 服务部门联系,电话:
1-847-600-8699。美国以外的国家和地区,请与 Shure 授权
的服务中心联系。
输出
输入 麦克风 线路 辅助
低阻抗麦克风
(150 Ω)
32 dB 72 dB 60 dB
线路 –20 dB 31 dB 19 dB
立体声 –20 dB 35 dB 23 dB
阻抗
输入
设计为用于 实际
(典型)
输入削波电平
麦克风 (XLR)<600 Ω1.4 kΩ–16 dBV
线路 <10 kΩ155 kΩ+24 dVB
立体声 <2 kΩ21 kΩ>28 dBV
阻抗
输出
设计为用于 实际
(典型)
输出削波电平
麦克风 > 600 Ω3 Ω–22 dBV
线路 >5k Ω300 Ω+18 dVB
辅助 ≥10 kΩ1.5k Ω+5 dVB

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ꑝ麕陲隕꾅냕넍뼍겢겑꿙
ꑝ麕덵렝냹늵ꯍ뼍겢겑꿙
넩韥韥ꌱꓱ閵頁넩꾅鸅隕ꩡ끞뼍덵ꍽ겢겑꿙
ꍽꌭꯍ阩냱ꈑꎁ鲛냱겢겑꿙
쀍韥霡ꌱꍾ덵ꍽ겢겑꿙뇑눥꽺뙩넍덵렝꾅黥ꄱ렍뼍겢겑꿙
驑ꗞ韥ꗞ꾩눥놽韥걙뭕ꟁ韥멵꾩냹ꗑꩥ뼍鱉韥韥꼥뺹붡뼝
鞱뙍꾅렍뼍덵ꍽ겢겑꿙
껽놹냹낹뼑ꜹ鞮뿊鿅鱉뇆덵뿊뻁ꆡ鞭鱉끞鵹꾅놶뼞뼍陁ꩡ끞뼍
겢겑꿙냕鞮냕뿊넍뻁ꆡ鞭鱉붢넩ꈑ鲙ꌭ뻵냱ꈑ霡ꫦ鷍꽩넽
걪鱽鲙뇆덵뿊뻁ꆡ鞭꾅鱉鸅闑넍뻵隱뼍驍넍뇆덵鲝녅閵넽걪
鱽鲙髈냵뻵넩驍뇆덵鲝녅鱉ꩡ끞녅넍껽놹냹낹뼑阸넺鱽鲙뇑
險鷑뻁ꆡ鞭閵뤍꫱뱭꾅ꎓ덵껿냹陲끥놹韥韥ꩡ꾅陁ꓭ넍뼍꾡
霡뿊뤍꫱뱭ꌱ霅뙩뼍겢겑꿙
놹낅뤉麑鱉ꗔ섽덵껿鵹ꈒ늱넍뼍隕뱮섽놹낅뻁ꆡ鞭ꩡ넩뇆ꭂ
ꭁ룈ꗄ韥韥꾅驍꿙鱉ꜵꜹ꾅놹낅뤉麑閵騱덵껿鵹ꈒꚩ뿭뼍
겢겑꿙
뇑눥꽺뙩閵덵뇊뼑ꜵꭂ븽ꜵ븽ꎁꩡ끞뼍겢겑꿙
驎ꉥ겑鿅鱉녚韥閹鶎껽ꩡ끞뼍덵껿냹鼁鱉韥韥넍놹낅냹꠱魈
냱겢겑꿙
ꑝ麕ꟹ걙鱉阵덒鷑ꟹ걙鲩鲮녅꾅陁ꗐ냱겢겑꿙놹낅뤉麑
驍뻁ꆡ鞭閵ꭅꩶ鷑陲끥韥韥꾅꼖뙩ꌱ섍ꍡ阥驍ꓱ阩냹齝꽩ꃝ
ꍥ陲끥韥韥閵ꟹ驍걪韥꾅鬭띑鷑陲끥韥韥閵뇊ꩶ녆鶎뼍덵
껿鱉陲끥韥韥ꌱ齝꽩ꃝꍥ陲끥麦韥韥閵ꭅꩶ鷑陲끥꾅鱉ꟹ
걙ꌱꗐ껹꼱뼞鱽鲙
꼖뙩閵齝꽩덵阥驍섞驕ꍡ鱉녚ꭁ꾅韥韥ꌱ鸅덵ꍽ겢겑꿙飸Ꚇ隱
闎넩ꓱ넩鲩陝넽鱉ꓱ阩냹韥韥낹꾅꿡ꇙ魈덵ꍽ겢겑꿙
0$,16뻁ꆡ鞭驍韥韥끞뢙뻁ꆡ鱉녆鶎閵鱚뼑ꩶ몑ꈑ驝껹넽꽩
꼱뼞鱽鲙
$&꽩鳆뫥넍險韥ꎙ闑녖넁냵G%냹뚽隱뼍덵껿껹꼱뼞鱽鲙
&/$66,霡눥넍韥韥鱉0$,16ꭁ룈뤍꫱뱭꾅ꚩ뿭뇆덵꾥陥ꗞ
겒냱ꈑ꾥陥鷍꽩꼱뼞鱽鲙
쀉녡驍闅놹낹뾍냹늹넩ꇙꐩ넩韥韥ꌱꠌꓱ鿅鱉걪韥꾅鬭띑겑
멙덵ꍽ겢겑꿙
넩뇑븽냹隕렍ꇙ隕겑鵹뼍덵ꍽ겢겑꿙鞭ꆼ陁뼍ꐩꩡꅁ넩鲙렍
阥驍뇑븽넩隕녚냹넱냱멡ꯍ넽걪鱽鲙
닆끉껽놹덵렝
뇑눥꽺뙩꾅덵뇊뼍阥驍韥韥꿵뼝颍볅ꎙ鷍鱉렩
뱭걙몕麑ꗐ렝鲵鿅鱉묁넩Ꟊ꾅ꎁꩡ끞뼍겢겑꿙
렩뱭ꌱꩡ끞뼍鱉陲끥넩鶎겑렩뱭꿵韥韥閵髍꽩뇭
ꜵꩶ냹넺덵껿鵹ꈒ늱넍뼍겢겑꿙
넩韥뿭鱉韥韥꾅놹韥ꮱ먡낹뾍냹냕ꗑ뼍鱉낹뾍뼑놹꼊넩섅ꌭ鲙鱉阸냹넍ꖭ뼞鱽鲙
넩韥뿭鱉넩韥韥꿵뼝颍뇑險鷑ꓭ꾅닆끉뼑녆鶎ꗄ냕덵ꚩꯍ덵렝넍驩끞넩麙꽩넽鲙鱉阸냹넍ꖭ뼞鱽鲙
陲隕넩韥韥넍놹꼊냵ꪒꐺ꾅낹뾍냹닂鱽鲙驩ꜵ꾅鱉ꩡ끞녅閵쀑끞뼕ꯍ넽鱉ꟹ걙ꜵ븽넩꽻걪鱽鲙ꑝ麕ꟹ걙鱉阵덒鷑ꟹ걙鲩鲮녅꾅陁
ꗐ냱겢겑꿙녆鶎놹꼊넩險녚띑뼍겑넍뇊놹꼊隱鲙ꌩ陁ꙵ陲鷍꽽냹陲끥꾅鱉껽놹ꚩ덒넩놶끞鷍덵껿걪鱽鲙

SHURE SCM262E
Shure SCM262E
SR(sound reinforcement)
.
Active-balanced
2
Unbalanced
3
.
SCM262E Stereo Mixer
,
,
,
,
/
.
ï
.
ï
Active-balanced XLR
1
.
ï
Active-balanced XLR
1
1/4
TRS
.
ï
STEREO INPUT(
)
3
ï
AUX(
)
ï
MIC/LINE OUTPUT(
/
)
ï
BASS
TREBLE
.
ï
1/2
.
ï
12 V
.
ï
.
ï
.
ï
(Ducking)
(
).
ï
(
).
MIC , 1-2. MIC LINE IN 2(MIC 2)
.
STEREO( ) , 1-3. CD ,
, VCR, STEREO
.
BASS TREBLE . (shelving filter)
/ .
MASTER( ) .
.
POWER( ) .
.
:SCM262E . ,
. ,
.
.100-120 Vac (SCM262) 220 Vac
(SCM262E) .
/ MIC/LINE( / ) . 1/4
Balanced
. DIP .
/ AUX( ) .
Unbalanced
.
DIP . SCM262E
. DIP
.
/ STEREO INPUTS( ), 1-3.
.
MIC 2 INPUT( ). 2
2 . Balanced/Unbalanced
1/4 Balanced
XLR .
MIC 1 INPUT. balanced
XLR .

DIP
LEFT/RIGHT OUTPUT MIC/LINE(
/
/
):
DIP
1
2
.
MIC 1/MIC 2 Ducking(
1/
2
) :
,
SCM262E
STEREO(
)
.
DUCKING LEVEL(
):
STEREO
.
STEREO 3 JUKEBOX MUTE(
3
):
DIP
.
,
STEREO 3
STEREO 1
2
.
PHANTOM POWER(
):
,
12V
.
balanced
SCM262E
.
.
,
SCM262E
.
.
1. .
2. SCM262E L/R STEREO INPUTS
(CD , VCR, , )L/R
.
3. SCM262E MIC INPUTS .
4. DIP 7
( ).
5. SCM262E L/R L/R .
: , AUX OUT(
) .
LINE OUT( ) . MIC/LINE( /
)AUX OUTPUT( ) 2
.
6. AC
. POWER( )
LED .
:SCM262E .
.
,
SCM262E .
, SCM262E
.
,
.
:
ON/OFF
.
(false-trigger)
.
1.
SCM262E .
2. DIP 3 4 1
2 .
3.
DIP
5
.
20dB .
.
, STEREO
3
STEREO 1
2
.
CD
, SCM262E
CD
.
STEREO 1
2
30
,
.
1.
SCM262E .
2. L/R STEREO 3 L/R
.
:
, STEREO 3 .
3. DIP 6 ( ).
: ,
STEREO 3
.
DIP
UP( , )DOWN( )
1 LEFT OUTPUT MIC/LINE
2 RIGHT OUTPUT MIC/LINE
3 MIC 1 DUCKING
4 MIC 2 DUCKING
5 DUCKING LEVEL –∞-20 dB
6 STEREO 3 JUKEBOX MUTE
7 12 V PHANTOM
LINE
LINE
OFF
OFF
OFF
OFF
-∞
MIC
MIC
ON
ON
ON
ON
-
20
LOUTPUT
ROUTPUT
MIC 1 DUCKING
MIC 2 DUCKING
DUCKING LEVEL (dB)
ST. 3 JUKEBOX MUTE
12 V PHANTOM
DOWN
UP
12346
57

2
1
3
L/R
L/R /
CD
AM/FM
VCR
LR
LR
VCR
L
R
L
R
LR

ï
4
.
.
ï
1
.
(
)
.
ï
1
.
(
)
.
ï
2
.
.
ï
12
, 1/4
(6 mm).
.
ï
4
, 1
(2.5 cm).
.
ï
4
.
.
ï
4
, 1/2
(1.25 cm).
SCM262E
,
SCM262E
SCM268
DFR11EQ
Shure
.
:
(
)
:
1. (8)
SCM262E .
:
1. (2)
.
(recessed edge) . (8)
.
:
.
2. (8)
.
3. ,
.
1. (4) .
.
,
,
SCM262E
,
:
1. (4)
.
: .
: .
2. (4)
.
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