POLAR
PATTERN
PRESSURE
ZONE
MICROPHONE
®
PZM -11LLWR
he Crown®
with a balanced,
The microphone can be plugged directly into a VCR line input — no costly mic preamp is needed. Output (via screw terminals) can be balanced or unbalanced. Powering is by
special order, as a PZM-11LLWRS1.
In the
The unit is “weather resistant,” which means:
•The microphone will work during and after rainfall.
•The mic’s frequency response will change tempo- rarily if the membrane gets wet, but will return to normal when dry.
•If water freezes on the membrane, the mic’s frequency response will change, but will return to normal when the ice melts and the membrane dries.
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•The microphone is not designed to be sub- merged.
Installation
1.Please refer to Figure 3 and locate all the parts shown. The electrical outlet box and cables are not included.
2.Run a
3.The
From your power source, run a twisted pair power cable to the mic location. Run the power cable through the hole in the electrical box. Service the end of the power cable.
Features | • | ||
• Ideal for outdoor security, surveillance and | |||
| recorders | ||
intercoms | • | Clear, articulate sound | |
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• | • | Inconspicuous | |
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Specifications |
| Fig. 1 | |
Transducer type: Electret condenser. |
| Frequency Response | |
Frequency response (typical): 80 Hz to 10,000 Hz |
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(see Fig. 1). |
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Polar pattern: Hemispherical. |
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Impedance: 75 ohms, balanced. Recommended |
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minimum load impedance 1000 ohms. |
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Power sensitivity, typical: +8 dBm/Pa. |
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Equivalent noise level |
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cal (0 dB = .0002 dyne/cm2), |
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S/N Ratio: 68 dB at 94 dB SPL. |
| Frequency in Hz | |
Maximum SPL: 100 dB SPL produces 3% THD at |
| Fig. 2 | |
maximum gain. |
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Operating voltage: | Dimensions |
ering by special order as a |
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Polarity: Positive pressure on diaphragm produces |
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positive voltage on audio+ terminal with respect to |
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audio– terminal |
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Current drain: 4 milliamperes. |
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Operating temperature range: |
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+14° to +140° F. The mic still works at |
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its sensitivity is reduced. When the mic is returned |
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to normal operating temperature, its sensitivity will |
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be within |
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Output connector: Screw terminals labeled AUDIO +, |
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AUDIO – and GROUND. |
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Cable: None supplied. Use |
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cable and |
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Materials: Steel plate and |
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holder. Plastic membrane, part no. |
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Finish: Silver. If you paint the mic, take care not to |
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paint inside the louvered wall plate. |
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Net weight: 2.5 oz. (71 g). |
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Dimensions: 4.530 x 2.780 x 1.722 inches (LWD) |
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(see Fig. 2). |
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*1 pascal = 10 dynes/cm2 = 10 microbars = 94 dB SPL.