Shure WH20 manual Polar Pattern, Impedance, Hum Sensitivity, Polarity

Polar Pattern

Cardioid (unidirectional) response-uniform with frequency, symmetrical about axis

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	ƒ		ƒ
ƒ			ƒ
ƒ			ƒ
		± G%
		± G%
ƒ		± G%	ƒ
+]		±G%
+]	ƒ		ƒ
+]
		ƒ

TYPICAL POLAR PATTERNS

FIGURE 7

Impedance

Rated at 150 ohms (200 ohms actual) Output Level (close talked* at 1,000 Hz)

Open Circuit Voltage: . . . . . . . . . . . . . . . . . . . . . . . . . . -67.0 db/Pa (0.45 m)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Pa = 94 dB SPL *At 12.5 mm (1/2 inch)

Hum Sensitivity

38.4dB equivalent SPL in a 1 millioersted field

Polarity

WH20QTR as a wired microphone: Positive sound pressure on diaphragm produces pos- itive voltage on tip with respect to sleeve (ground) of microphone output phone plug connector.

WH20QTR, WH20TQG used with Shure Wireless Systems:

1/4-inch Phone Jack Receiver Outputs: Positive sound pressure on diaphragm produc- es positive voltage on tip of receiver output connector.

3-pin XLR Receiver Outputs: Positive sound pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3 of low-impedance output connector, and on tip of Aux output connector.

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