Changing SWITCH OUT Terminal to Momentary, Independent of S1 position. (Figure 6 on page 12)
To accommodate interface equipment requiring momentary clo- sure of the microphone (even when the desired microphone func- tion is latching on/off), proceed as follows:
1.Remove R45 from the top of the circuit board.
2.Reinstall R45 at location R46 on the top of the circuit board.
Custom Switch Modifications
S4 is available for custom logic modifications. When S4 is in the ON position, pad W4 is connected to pad W5.
SHURE, the Shure logo, and MICROFLEX are registered trade- marks of Shure Incorporated.
DESIRED MICROPHONE FUNCTION | USER ACTION/LED DISPLAY |
| DIP SWITCH SETTINGS |
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|
Push to Mute (As Shipped) | Press and hold switch to temporarily mute | S1 | = OFF |
| microphone; release switch to unmute | S2 | = OFF |
| LED turns on when microphone is active | S3 | = OFF |
Push to Talk | Press and hold switch to activate microphone; | S1 | = OFF |
| release switch to mute | S2 | = ON |
| LED turns on when microphone is active | S3 | = OFF |
Push On/Push Off | Press switch to toggle microphone on or off | S1 | = ON, |
| LED turns on when microphone is active | S2 | = ON for muted initial state |
|
| S2 | = OFF for active initial state |
|
| S3 | = OFF |
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|
Switch Deactivated, Mic Always Active | No action, LED Always OFF | S3 | = ON |
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Switch Deactivated, Mic Always Active | Short LED IN terminal to LOGIC GROUND terminal | S3 | = ON |
| LED Always ON |
|
|
Automatic Mixer Mode | If S1=OFF, SWITCH OUT signal will be momentarily | S1 | = ON or OFF |
| logic low when switch is pressed | S3 | = ON |
| If S1=ON, SWITCH OUT signal will be latching logic |
|
|
| low when switch is pressed |
|
|
| Connect SWITCH OUT signal to various logic inputs |
|
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| of automatic mixer for custom functions |
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| Connect mixer channel GATE OUT to microphone |
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| LED IN. LED on microphone turns on when its |
|
|
| channel is gated on |
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|
SPECIFICATIONS
Frequency Response (Figure 3 on page 11) 50 to 17,000 Hz
Polar Pattern (Figure 4 on page 11)
Output Impedance (at 1,000 Hz)
Rated at 150 Ω (180 Ω actual)
Open Circuit Sensitivity
At 1 kHz, ref. 1 V per Pascal*
* 1 Pascal=94 dB SPL
Maximum SPL (1kHz at 1% THD, 1 kΩ load)
Cardioid:123.0 dB
Supercardioid:122.0 dB
Omnidirectional:117.5 dB
Equivalent Output Noise
Cardioid:29.0 dB SPL
Supercardioid:28.0 dB SPL
Omnidirectional:70.5 dB SPL
Signal to Noise Ratio (referenced at 94 dB SPL)
Cardioid:65.0 dB
Supercardioid:66.0 dB
Omnidirectional:70.5 dB
Dynamic Range with 1 kΩ load 94.0 dB
Common Mode Rejection 45.0 dB minimum
Mute Switch Attenuation
50.0 dB minimum
Preamplifier Output Clipping Level (1% THD)
Polarity
Positive sound pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 of XLR output connector.
Power Requirements
11 to 52 Vdc phantom, 2.0 mA
Environmental Requirements
Operating Temperature Range:
Relative Humidity: 0 to 95% Dimensions (Figure 5 on page 12)
Weight
MX412D: 0.81 kg (1.80 lbs.) net, 1.63 kg (3.62 lbs.) packaged
MX418D: 0.82 kg (1.82 lbs.) net, 1.64 kg (3.64 lbs.) packaged
Cable Type (Figure 7 on page 12)
The attached custom cable contains a shielded audio pair and three unshielded conductors for logic control.
Overall diameter=0.6 mm (0.165 in.)
CERTIFICATION
Eligible to bear CE Marking. Conforms to European EMC Direc- tive 89/336/EEC. Meets applicable tests and performance criteria in European Standard EN55103 (1996) parts 1 and 2, for residen- tial (E1) and light industrial (E2) environments.
FURNISHED ACCESSORIES
| |
(1 furnished, 4 in replacement kit) | RK412WS |
OPTIONAL ACCESSORIES
Foam Ball Windscreen | A99WS |
Locking Metal Windscreen | A412MWS |
Custom Logic Cable (specify length) | 15A525 |
Custom Logic Cable |
|
with threaded adaptor, to male XLR | C131 |
REPLACEMENT PARTS
Omnidirectional Cartridge | R183B |
Supercardioid Cartridge | R184B |
Cardioid Cartridge | R185B |
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