Shure SCM800E manual LINE-LEVEL Output to MIC-LEVEL Output, Disable Master Level Control

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 mi- crophones.

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 resis- tor for less reduction.

NOTE To compensate for higher output condenser micro- phones, the factory set gain in the PHM position is 13 dB lower than the gain in the MIC position.

LINE-LEVEL OUTPUT TO MIC-LEVEL OUTPUT

Procedure:

1. Short jumper X901.

2. Remove resistors R900 and R909.

DISABLE MASTER LEVEL CONTROL

The Master gain control can be disabled so it cannot be tam- pered 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:

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	Procedure:
not link.	Remove resistor R9024.

SEND/RETURN (INSERT) TO DIRECT OUT

Changes a channel’s 1/	inch insert jack to a Direct Out jack.	Procedure:
	4-	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.

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