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310 high sensitivity covert pickup
Pure tone, built-in automatic gain control (AGC) circuit is designed.
Working voltage: DC 612V
The output signal amplitude: 2.5Vpp / 25db;
Frequency response: 100-5500Hz;
Transmission distance: 1000m;
Monitor range: 5-60 ㎡
Pickup location choice
Pickup at the ceiling ceiling installation, can be installed on the wall side hung. Installation position as far as possible from the conversation area mainly close to.
For example: the interrogation room can be installed in the neighborhood; the classroom can be installed on the platform near; small meeting rooms can be mounted on the ceiling of the central.
Installation principle: as close as possible to the conversation area mainly, this pickup is better.
Connect power line of positive electrode method
Pickup power supply mode requires use of remote centralized power supply (i.e. in the audio recording device / centralized sound amplification equipment end power supply), its main purpose is stronger anti interference and noise. In order to avoid due to dirty power caused by the sound quality decline.
Pickup can use 8V-20V wide range of DC stabilized power supply, recommend the use of DC12V. Power line if more than 500 meters, the loss generated voltage drop, recommend the use of 15V-20V DC regulated power supply.
Current pickup consumed about 50-100 Ma, that is to say a nominal DC regulated power supply of 2 AMPERES can be used for 5 monitor head works at the same time. Applications should consider the power efficiency and power loss problem, try to use the nominal value and higher power.
The DC regulated power supply is often said that the "Transformers", from the general power transformer, rectifier, filter capacitor and integrated voltage regulator.
Try not to use the switch power supply, it may cause a lot of circuit noise! There are lots of switch power quality is poor, the ripple coefficient is very large, will cause the monitor head buzzing sound.
What is power?
Simple said: is the DC switching power supply, is a kind of automatic regulated power supply is composed of the electronic switch and an electronic switch oscillator. For example, ordinary desktop computer power supply is switch power supply.
Common ground connection the cathode of the power supply and audio wire
Microphone audio wire and the cathode of the power supply Become, must be negative and audio input and a DC power supply (Line In) of the ground.
If the power supply and the audio is not well connected, will cause the sound quality decreased or no sound. If the audio equipment Line In terminal no monitor head is connected with the ground and, generally speaking the sound is very small.
Return Policy
If the product you receive is not as described or low quality, the seller promises that you may return it before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe) and receive a full refund. The return shipping fee will be paid by you. Or, you can choose to keep the product and agree the refund amount directly with the seller.N.B.: If the seller provides the "Longer Protection" service on this product, you may ask for refund up to 15 days after order completion.
Seller Service
On-time Delivery: If you do not receive your purchase within 60 days, you can ask for a full refund before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe).Hot Flash Deal monitoring special fidelity miniature pinhole adjustable sensitivity CCTV MIC
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