Shure SCM800, SCM800E User Manual

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The Shure Model SCM800 is a full-featured, eight-channel mi­crophone mixer for sound reinforcement, general audio re­cording, and audio-visual systems. Any low-impedance, bal­anced dynamic or condenser microphone, including a wire­less microphone system, can be used with the SCM800 mixer.
Each SCM800 accepts up to eight microphone- or line–level inputs and one aux-level input (two input jacks feed the same channel). Up to four SCM800 mixers can be linked to provide up to 32 input channels. Each input channel has a two-band equalizer, switchable microphone- or line-level operation,
FEATURES
S Compatible with Shure SCM810 and FP410 automatic mi-
crophone mixers
S Adjustable EQ per channel: low-frequency rolloff and high-
frequency shelving
S 48 V phantom power selectable for each input
S Active balanced microphone- and line-level inputs and line-
level output
S Highly RF-resistant chassis and circuitry
S LED indication of channel clipping
SCM800 FRONT PANEL
switchable 48 V phantom power, and a 1/4-inch send/receive insert jack.
The SCM800 operates on 120 Vac power; the SCM800E oper­ates 230 Vac power. Both models are supplied with rack­mounting hardware, link cable and removable block terminal connectors. An accessory rack panel adapter (Model RKC800, available separately) converts the removable block input and output connectors to XLR connectors, and the Aux connectors to phono jacks.
S Linking capability for systems up to 32 microphones
S Two Aux-level input jacks that feed one channel
S Insert jack on each channel
S Manual mixing of input channels
S Internal Modification permits 230 V operation (SCM800) or
120 V operation (SCM800E)
S Front-panel headphones output with level control
S Peak-responding output limiter with selectable thresholds
and LED indicator
1 2 5 7 8 10
3 6 9
1. Microphone Channel Gain Controls 1 - 8: Allows ad­justment of microphone gain.
2. Input LED 1 - 8: Lights red at 6 dB below clipping level.
3. Low-Cut Filter 1 - 8: Recessed screwdriver adjustment provides adjustable low-frequency rolloff (high pass) to reduce undesirable low-frequency signals.
4. High-Frequency Shelving Filter 1 - 8: Recessed screw- driver adjustment provides level boost or cut in mid/high­frequency region for compensation of off-axis lavalier mi­crophones, or for cutting the high-frequency sibilance of vocal microphones.
5. AUX Level Control: Sets the input level for aux-level equipment connected to the adjacent INPUT or rear-panel
4
1
/4-inch AUX input.
MODEL SCM800/E FRONT PANEL
FIGURE 1
6. AUX INPUT iary- or line-level sources, i.e., tape recorders, into output. Signal appears at output of all linked mixers.
7. MASTER Level Control: Determines the overall mix level.
8. Output Level Meter: Nine-segment LED meter indicates peak output signal level. Last LED indicates limiter action.
9. PHONES Control and monitoring of mixer output through headphones. PHONES control determines headphones output level.
10. POWER LED: Lights green when unit is powered.
1
/4-inch phone jack
1
/4-inch Phone Jack: Mixes external auxil-
1
/4-inch Phone Jack: Permits
3
SCM800 REAR PANEL
120VAC 50/60 Hz 200mA
LINK OUT
AUX/INS/INS
LINK
IN
(SWITCH)
LINE
OUTPUT
INSERT AUX IN
MIC/PHM/LINE
SWITCH
INSERT
MIC/PHM/LINE
SWITCH
INSERT
MIC/PHM/LINE
SWITCH
INSERT
MIC/PHM/LINE
SWITCH
INSERT
MIC/PHM/LINE
SWITCH
INSERT
MIC/PHM/LINE
SWITCH
INSERT
MIC/PHM/LINE
SWITCH
INSERT
MIC/PHM/LINE
SWITCH
78
Ć
+
11 12 17
13
Ć
+
14 15
16
MODEL SCM800/E REAR PANEL
FIGURE 2
11. SCM800: 120 VAC Power Connector and Rocker Switch: Switch turns unit on when power cord is plugged
into 120 Vac. Can be internally changed to 230 V opera­tion (see Voltage Selection).
SCM800E: 230 VAC Power Connector and Rocker Switch: Switch turns unit on when power cord is plugged
into 230 Vac. Can be internally changed to 120 V opera­tion (see Voltage Selection).
12. DIP Switch: The 7-position DIP switch provides control of the output limiter threshold (see DIP Switches).
13. LINK IN/OUT Jacks: Permit multiple SCM800 mixers to be stacked for additional inputs.
14. LINE OUTPUT Removable Block Connector: Active balanced line-level signal for connection to amplifiers, re­corders or other mixers. If necessary, output level can be changed to microphone level. Refer to the Internal Modifi- cations section of this manual.
Ć
+
Ć
+
Ć Ć
+
18
Ć
+
MICĆ
+
LEVEL
Ć
+
123456
+
PHANTOM
(PHM)
(MIC)
(SWITCH BEHIND
CONNECTOR)
1
15. SEND/RECEIVE
/4-inch Insert Jacks: Post-fader,
post-EQ insert point to add external compressor/limiter, graphic or parametric EQ, or other signal processors. Tip is send, ring is return. Can be modified for use as a Direct Out (see Internal Modifications).
16. AUX/INS/INS 3-Position Slide Switch: Selects either aux input function or insert function for channel 8 (only) In­sert jack. Left switch position is AUX IN; center and right positions are INSERT. This switch is located behind Line Output connector.
17. INPUT 1-8 Removable Block Connectors: Active bal­anced microphone- or line-level inputs.
18. Input 1 - 8 MIC/PHM/LINE 3-Position Slide Switch: Se- lects operation at either microphone-level (left), micro­phone-level with 48 V phantom power (center), or line-lev­el (right) signals. This switch is located behind the remov­able block connector.
Ć
LINEĆ LEVEL (LINE)
44
SYSTEM SETUP
RACK MOUNTING THE SCM800/E
To mount an SCM800 or SCM800E in a standard 483 mm (19-inch) audio equipment rack so that the front panel faces out, as shown in Figure 4. Then secure secure the mixer to the rack with the four supplied Phillips head screws.
SCM800/E CONNECTIONS
Refer to Figure 5 and proceed as follows:
1. Connect microphone- or line-level signal sources to the Channel Input connectors (use conventional two-conduc­tor shielded cables).
2. Insert a screwdriver or similar tool into the slot above each block connector and adjust the input slide switch as re­quired: microphone level (left position), 48 V phantom power (center position), or line level (right switch posi­tion).
3. Connect the Line Level Output of the SCM800/E to the input of other mixers, equalizers, amplifiers, or recorders. If multiple SCM800/E mixers are to be used, refer to the Mixer Linking paragraph of this manual.
4. If headphone monitors are to be used, plug them into
5. Connect the power cord to a 120 Vac (SCM800) or 230
NOTE: For instructions on how to change the operating volt­age of either model, refer to the Internal Modifications section of this manual.
1
/4-inch PHONES jack on the front-panel.
the
Vac (SCM800E) power source.
RACK MOUNTING THE SCM800/E
FIGURE 4
TO STEREO OR MONO HEADPHONES
FROM AUX– OR LINE–LEVEL SOURCE
MIXER OUTPUT TO AMP/REC/MIXER INPUT
TO POWER SOURCE
SCM800/E AUDIO CONNECTIONS
FIGURE 5
TO AMP/REC/MIXER INPUT (CH. 1–7)
FROM MIC/LINE SOURCE (CH. 1–8)
TO AMP/RECORD/MIXER INPUT OR FROM AUX SOURCE (CH. 8)
TO LINKED SCM800 MIXERS
OUTPUT LIMITER THRESHOLD SETTINGS
The DIP switches on the rear-panel, shown below in Figure 3, control the output limiter threshold settings. Switches 5 and 6 change the output limiter threshold to OFF (default setting), +16 dBm, +8 dBm, or +4 dBm. Other settings are as shown in the table at right. Refer to the Internal Modifications section of this manual for additional settings.
NOTE: Switches 1, 2, 3, 4 and 7 are inactive and are not used.
(MIXER
REAR
PANEL)
OUTPUT LIMITER THRESHOLD DIP SWITCH
1 2 3 4 5 6 7
FIGURE 3
DIP SWITCH FUNCTIONS
DIP Switch Position Limiter Threshold
5 Up
6 Up
5 Down
6 Up
5 Up
6 Down
5 Down
6 Down
5
Limiter Off
(default)
+8 dBm
+16 dBm
+4 dBm
LINKING MULTIPLE SCM800 MIXERS
Up to four SCM800 mixers can be “linked” using the supplied link cables If additional inputs are needed. Such a configura­tion can provide 32 mic inputs. Refer to Figure 6.
When multiple SCM800 mixers are linked, all input signals ap­pear at all linked mixer outputs––there is no master-slave rela­tionship. The output controls and functions of each linked mix­er are post-link and do not affect the signals appearing at other linked mixer outputs. Each mixer’s Master level control only controls its own output. Each output can be used independent­ly. In a linked system, the Aux input of any mixer appears at each linked mixer’s output. See Internal Modifications to de­feat the linking of Aux signals.
Link jacks should be connected sequentially: the LINK OUT of one mixer to the LINK IN of the next, leaving one LINK OUT and one LINK IN unconnected.
NOTE: Each doubling of the number of linked mixers de­creases the master output level by 6 dB.
LINKING TO OTHER SHURE AUTOMATIC MIXERS
An SCM800 can be interfaced with Shure SCM810 and FP410 automatic microphone mixers via the link jacks. Linking an SCM800 is equivalent to adding an additional mixer with eight open microphones to a system. Because of the loading effects of additional open microphones, only one SCM800 can be linked to an automatic system. When using more than one SCM800 with other Shure automatic mixers, connect them as described in the following section.
NOTE: When linking an SCM800 to an automatic system, use the SCM800 LINK OUT jack to interface with the LINK IN jack of the automatic system (see Figure 7).
LINKING MULTIPLE SCM800/E MIXERS
FIGURE 6
USING AN SCM800 AS A SUBMIXER
The master output of the SCM800 (or the output of a mixer in a group of linked SCM800 mixers) can be connected to a chan­nel input or the aux input of an automatic mixer, or other types of mixers. See Figure 8.
ADDITIONAL LINK CABLES
Additional 381 mm (15 in.) link cables are available as Shure Part No. 95A8889. Longer cables in a variety of lengths are available from Apple Computer as computer printer connec­tions; they are variously referred to by Apple as “shielded serial
cable with two mini DIN-8 connectors,” and “Apple System Pe­ripheral–8 Cable.”
LINKING AN SCM800/E TO OTHER AUTOMATIC MIXERS
FIGURE 7
SCM800
OUT IN
SCM800
IN
LINE OUT
MIC IN
SCM810
USING AN SCM800/E AS A SUBMIXER
FIGURE 8
66
BASIC MIXER OPERATION
1. Turn on the Power switch.
2. Adjust each channel level so that its Overload LED flick­ers only during very loud speech or noise.
3. Turn unused channel controls full counterclockwise.
4. Adjust the Low-Cut and High-Frequency controls adja­cent to each Input Gain control until all microphones sound alike.
LIMITER
The SCM800’s output limiter prevents distortion during loud program peaks without affecting normal program levels. In­creasing the individual or Master level controls will increase the average output and, in turn, the amount of limiting. The lim­iter prevents excessive overloading of devices connected to the SCM800 output. As supplied, the limiter is defeated.
EQUALIZER FUNCTIONS
Low Cut Filter (High-Pass)
The low-cut (or high-pass) filter allows all frequencies above its cutoff point to pass from filter input to filter output without at­tenuation, while frequencies below the cutoff are attenuated (see Figure 9). The cutoff point is defined as the frequency where the signal has dropped 3 dB relative to the flat, or band­pass, region. Below the cutoff point, the filter exhibits increas­ingly more attenuation as the frequency diminishes. The rate at which this attenuation occurs is defined in decibels per oc­tave (dB/oct). The SCM800 has a one-pole, low-cut (high­pass) filter of 6 dB per octave.
Low-cut filters are ideally used for attenuating, or rolling off, the audio signal where extraneous noise, excessive proximity ef­fect, or other unwanted material is present. For example, the low-frequency vibration cause by footsteps and vehicle traffic can be transmitted through microphone stands to the micro­phone, and then into the sound system. These frequencies, typically ranging from 5 to 80 Hz, are generally not desirable.
+2
FULL CW
0
-2
-4
-6
-8
-10 20 100 1,000 5,000
50%
ROTATION
FULL CCW
FREQUENCY (Hz)
5. Adjust the SCM800 Master level control for the desired output level, as indicated by the output peak meter.
6. Adjust the headphones volume level with the PHONES control knob.
The limiter threshold can be set for a peak output level of +4, +8, or +16 dBm. With the threshold set at +16 dBm, the mixer has 12 dB of headroom at a nominal level of +4 dBm. Refer to the Internal Modifications section for information on how to change the limiter’s settings.
High-Frequency Shelving
The fixed-frequency equalizer produces a 6 dB boost or cut at 5 kHz and above (see Figure 10). High-frequency shelving is extremely useful for boosting flat frequency response, temper­ing very sibilant vocal microphones, or enhancing the sound of off-axis lavalier microphones.
+10
+8
+6
+4
+2
-2
-4
-6
-8
-10
0
200
1,000 10,000
FREQUENCY (Hz)
20,000
FULL
CW
50%
ROTATE
FULL CCW
HIGH-FREQUENCY SHELVING EFFECTS
FIGURE 10
LOW–CUT FILTER EFFECTS
FIGURE 9
7
SPECIFICATIONS
Measurement Conditions (unless otherwise specified):
Line voltage 120 Vac, 60 Hz (SCM800) or 230 Vac, 50 Hz (SCM800E); full gain; 1 kHz.
Source impedances: Mic 150 Terminations: Line 10 k:, Phones 300 :tip-sleeve and ring­sleeve), Direct Out 10 k Equalization controls adjusted for flat response, Channel 1 gain control full clockwise, other gain controls full counter-
clockwise
Frequency Response (Ref .1 kHz, channel controls centered)
50 Hz to 20 kHz r2 dB; -3 dB corner at 25 Hz
Voltage Gain (typical, controls full clockwise)
Input Line Head-
Low-impedance
mic (150 :)
Line 40 dB 48 dB –6 dB
Aux 44 dB 52 dB
Send/Return 20 dB 28 dB
80 dB 88 dB 34 dB
Inputs
Input
Mic 19-600 : 10 k: -15 dBV
Line
Aux
Send/Return
Designed
for use with
d2 k:
d2 k:
d2 k:
Outputs
Output
Line >600 : 60 : +18 dBV
Headphones 8-200 :,
Direct Out >2 k: 1 k: +18 dBV
Send/Return >2 k: 1 k: +18 dBV
Designed
for use with
60 : recom-
mended
Total Harmonic Distortion
<0.1% at +18 dBV output level, 50 Hz to 20 kHz (through 20 Hz-20 kHz filter; Input 1 and Master at 5, all other controls full counterclockwise)
Hum and Noise
Equivalent Input Noise: -125 dBV (150 : source; through
Equivalent Input Hum and Noise: -123 dBV (150 : source;
Output Hum and Noise (through 20 Hz to 20 kHz filter; channel controls full counterclockwise):
Master full counterclockwise: -90 dBV Master full clockwise: -62 dBV
:, Line 150 :
:
Output
phones
Impedance
Actual
(typical)
10 k: +22 dBV
10 k: +22 dBV
10 k: +18 dBV
Impedance
Actual
(typical)
300 : +12 dBV
400 Hz–20 kHz filter)
through 20 Hz - 20 kHz filter)
Direct Out
Input
Clipping Level
Output
Clipping Level
Common Mode Rejection
>70 dB at 1 kHz
Polarity
Mic/Line, Send inputs to all outputs are non-inverting; Aux input to all outputs is inverting
Overload and Shorting Protection
Shorting outputs, even for prolonged periods, causes no damage. Microphone inputs are not damaged by signals up to 3 V; Line and Monitor inputs by signals up to 20 V
Equalization
Low-frequency: 6 dB/octave cut, adjustable corner from 25 to 320 Hz
High-frequency: r6 dB at 5 kHz, r8 dB at 10 kHz, shelving
Limiter
Type: Peak Threshold: Switchable: off, +4, +8, +16 (dBm at output) Attack Time: 2 ms Recovery Time: 300 ms Indicator: Lights red when limiting occurs
Input LEDs
Light at 6 dB below clipping
Phantom Power
46 Vdc open-circuit through 6.8 k
: series resistance per
DIN 45 596
Operating Voltage
SCM800: 120 Vac rated nominal (see Voltage Selection
for 230 Vac operation), 50/60 Hz, 200 mA
SCM800E: 230 Vac rated nominal (see Voltage Selection
for 120 Vac operation), 50/60 Hz, 100 mA
Temperature Range
Operating: 0 Storage: -30
Overall Dimensions
44.5 mm H x 483 mm W x 317 mm D (1
q to 60q C (32q to 140q F ) q to 70q C (-22q to 158q F)
3
/4 x 19 x 121/2 in.)
Net Weight
4.3 kg (9 lb 9 oz)
Certifications
SCM800: Listed by Underwriters Laboratories, Inc.; listed as Certified by Canadian Standards Association
SCM800E: Conforms to European Union directives; eligible to bear CE marking; VDE GS-Certified to EN 60950; EU EMC Immunity Requirements: EN50082-1
Replacement Parts
Knob, Channel Gain & Phones (white) 95A8238. . . . . . .
Knob, Master (blue) 95B8238. . . . . . . . . . . . . . . . . . . . . . . .
Line (Power) Cord (SCM800) 95A8389*. . . . . . . . . . . . . .
Line (Power) Cord (SCM800E) 95A8247*. . . . . . . . . . . . .
Link Cable 95A8889. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Three -Terminal Block Connector 95A8580. . . . . . . . . . . .
Service Statement
For additional service or parts information, please contact the Shure Service Department at 1-800-516-2525. Outside the United States, please contact your authorized Shure Service Center.
*For systems requiring other mains connectors, use a power cord with an IEC 320 type mating connector for connection to the SCM800, and an appropriate plug on the other end for connection to the mains. The supplied cord uses Harmonized IEC Cordage with color coding as fol­lows: Brown = Line, Blue = Neutral, Green/Yellow = Ground.
88
INTERNAL MODIFICATIONS
WARNING: All modifications must be performed by quali-
fied service technicians. Voltages in this equipment are haz­ardous to life. No user-serviceable parts inside. Refer all servicing to qualified service personnel. The safety certifica­tions of the SCM800 do not apply when the operating volt­age is changed from the factory setting.
ABOUT PRINTED CIRCUIT BOARD MODIFICATIONS
S A jumper is represented by “X” on the printed circuit
board legend, a resistor is represented by an “R.”
S The first number in the reference designator indicates
the channel number; i.e., R1027 refers to a Channel 1 resistor, and X7216 refers to a Channel 7 jumper, etc.
S Components in the Master section are preceded by
the number “9” (X901, etc.).
S The circuit board contains holes where resistors are
to be added.
S A single drop of solder can serve as a jumper between
adjacent jumper pads.
S All Channel modifications in this section use
Channel 1 as an example.
REMOVING THE TOP COVER
To gain access to the main printed circuit board, remove the eight Phillips head screws securing the top cover to the chas­sis and remove it. Most internal modifications can be made from the top of the main board.
MODIFYING THE SCM800 FOR 220–240 VAC, 50/60 HZ OPERATION
The SCM800 can be internally modified to operate on 230 Vac, 50/60 Hz power.
NOTE: The supplied cord uses Harmonized IEC Cordage with the following color coding: Brown = Line, Blue = Neutral, Green/Yellow = Ground. For systems requiring other mains connectors, obtain a power cord with an IEC 320 type mating connector for connection to the SCM800, and an appropriate plug on the other end for connection to the mains.
Procedure:
1. Disconnect the SCM800 from the AC power source.
2. Remove the top cover.
3. Locate Voltage Selector switch SW903 adjacent to power transformer T901. Use a screwdriver to turn the center ro­tor on the SW903 to the 230V position.
4. Locate Fuse F901 and remove it. Replace it with a 100 mA, 250 V, time delay fuse for 230V operation. Fuse part numbers are listed in following table:
Fuse Type Shure Part No. Littelfuse Part No.
100 mA, 250 V 80C258 218.100
200 mA, 250 V 80BC8196 239.200
5. Replace the power cord with a cord rated for for 230V op­eration, i.e., an IEC appliance connector on the equip­ment end and a CEE 7/7 (“Schuko”) mains connector on the other.
MODIFYING THE SCM800E FOR 100–120 VAC, 50/60 HZ OPERATION
The SCM800E can be internally modified to operate on 120 Vac, 50/60 Hz power.
NOTE: The supplied cord uses Harmonized IEC Cordage with the following color coding: Brown = Line, Blue = Neutral, Green/Yellow = Ground. For systems requiring other mains connectors, obtain a power cord with an IEC 320 type mating connector for connection to the SCM800E, and an appropriate plug on the other end for connection to the mains.
Procedure:
1. Disconnect the SCM800E from the AC power source.
2. Remove the top cover.
3. Locate Voltage Selector switch SW903 adjacent to power transformer T901. Use a screwdriver to turn the center ro­tor on the SW903 to the 120V position.
4. Locate Fuse F901 and remove it. Replace it with a 200 mA, 250 V time delay fuse for 120 V operation. Fuse part numbers are listed in the following table:
Fuse Type Shure Part No. Littelfuse Part No.
200 mA, 250 V 80BC8196 239.200
100 mA, 250 V 80C258 218.100
5. Replace the power cord with a cord rated for 120V opera­tion, i.e., an IEC appliance connector on the equipment end and a mains connector suitable for 120V operation on the other.
9
INSERTING A 15 dB MICROPHONE PREAMPLIFIER PAD
Each channel’s microphone preamplifier gain can be reduced by 15 dB. This may be desirable with extremely high-output mi­crophones.
LINE-LEVEL OUTPUT TO MIC-LEVEL OUTPUT
DISABLE MASTER LEVEL CONTROL
The Master gain control can be disabled so it cannot be tam­pered with. The following table indicates the resistor value to be used for the desired gain.
Master Section Gain Resistance
-6 dB 5.1 k:
0 10 k:
6 dB 20 k:
Procedure:
To pad the gain of the MIC position
1. Remove surface mount resistor R1023.
2. Solder a 680 : resistor at jumper X112. For a greater gain reduction, use a resistor with a value greater than 680 :. Use a lesser value resistor for less reduction.
To pad the gain of the PHM (phantom) position:
1. Remove surface mount resistor R1026.
2. Solder a 1.5 k: resistor at jumper X110. This reduces gain by 8 dB. For a greater gain reduction, use a resistor with a value greater than 1.5 k:. Use a lesser value resis­tor for less reduction.
NOTE To compensate for higher output condenser micro­phones, the factory set gain in the PHM position is 13 dB lower than the gain in the MIC position.
Procedure:
1. Short jumper X901.
2. Remove resistors R900 and R909.
Procedure:
1. Remove resistor R9230.
2. Install new resistor at jumper X914.
CHANGE LIMITER THRESHOLD
All three threshold settings (+16, +8 and +4 dBm) can be changed. To shift the threshold down by 6 dB, resistor R will be 82 k:. To shift the limiter thresholds up by 6 dB, R will be 330 k:.
Procedure:
1. Remove resistors R9177 and R9180.
2. Install new resistor R at jumper X907.
LOCAL AUX OPERATION
With linked mixers, the Aux input from a modified mixer does not link.
Procedure:
Remove resistor R9024.
SEND/RETURN (INSERT) TO DIRECT OUT
Changes a channel’s 1/4-inch insert jack to a Direct Out jack. Procedure:
1. Remove resistors at X101, X102, X105 and X106, and X808 if modifying channel 8.
2. Short jumpers R1011 and R1020.
SEND/RETURN TO DIRECT OUT POST-FADER
A channel’s Insert phone jack can be changed to Direct Out, post-fader.
Procedure:
1. Remove resistors at X101, X102 and X105.
2. Short jumpers at R1020.
1010
REMOTE VOLUME CONTROL OF CHANNELS
The channel, aux, or master levels can be controlled remotely by a dc voltage via an external VCA (Voltage Controlled Ampli­fier). An example of an external VCA is the ST-VCA1 from Ra­dio Design Labs (1–800–281–2683 or www.rdlnet.com).
Procedure: For channel control:
1. Connect the tip of a 1/4-in. connector to the line input of the VCA, and the sleeve to the ground of the VCA.
2. Connect the ring to the line output of the VCA.
3. Plug the 1/4-in. connector to the Insert jack of the SCM800.
4. Set the channel level control should be set to 5.
For Aux In control:
1. Connect the external source to the VCA line input.
2. Connect the VCA line output to the tip and sleeve of the SCM800 Aux input.
3. Set the Aux control to 5.
For Master control:
1. Connect SCM800 Line output to the VCA line input.
2. Connect the VCA line output to the external device (amplifi­er, tape recorder, etc.).
3. Set Master control to 5.
11
SHURE Incorporated http://www.shure.com United States, Canada, Latin America, Caribbean: 5800 W. Touhy Avenue, Niles, IL 60714-4608, U.S.A. Phone: 847-600-2000 U.S. Fax: 847-600-1212 Intl Fax: 847-600-6446 Europe, Middle East, Africa: Shure Europe GmbH, Phone: 49-7131-72140 Fax: 49-7131-721414 Asia, Pacific: Shure Asia Limited, Phone: 852-2893-4290 Fax: 852-2893-4055
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