Main specifications / special features:
Multi-frequency infrared emitting device microphone PCBA, product number A2
A2 Infrared Microphone Series is tailor-made for the use of a large number of small rooms
The 360-degree omnidirectional infrared signal receiving device more completely solves the problem of disconnection that often occurs in wireless microphones
Comprehensive technical parameters:
Infrared wavelength: 850nm
Carrier frequency: dual-channel design CHA=3.8 MHz, CHB=4.5MHz
Effective viewing radius distance: about 8 meters.
Carrier frequency error: <±5ppm
Wide operating temperature range (-20~+55℃)
S/N signal-to-noise ratio: >85dB
Offset: ±75KHz with companding circuit
With the pilot frequency mute function, it can effectively improve the anti-interference ability and completely solve the switch impact sound.
Distortion: <0.3%, 1KHz for A
Frequency response range: 75Hz~15k±3dB
Audio transmission method: FM
The main technical parameters of the receiver:
Receiver frequency: dual-channel design CHA=3.8 MHz, CHB=4.5MHz
Output level: 200mV
Line: 300mV
Power supply: AC220V/50Hz
Specifications of chest-mounted infrared wireless microphone:
Microphone form: single-pointing type
Transmission frequency: 4.5MHz
The automatic power saving function when there is no voice signal can greatly extend the battery life.
Dedicated lithium ion rechargeable battery: 4.2V/1100MAh
Low battery and charging indication
Charging method: constant voltage and constant current
Battery continuous working time: about 6 hours
Handheld infrared wireless microphone specifications:
Microphone form: single-point moving coil type
Transmission frequency: 3.8MHz
The automatic power saving function when there is no voice signal can greatly extend the battery life.
AA alkaline batteries or AA rechargeable batteries,
Battery continuous working time: about 6 hours
Due to the flexible frequency point selection, avoiding the easily interfered frequency band (2~3MHz), and adopting the structure of multiple frequency conversion, the anti-interference ability of the whole system is greatly improved, and the overall performance of the infrared wireless microphone is greatly comprehensive. Promote. The following is a comparison table of the performance of the infrared microphones of Maxic and Panasonic.
Maxic infrared wireless microphone (A series)
Panasonic infrared wireless microphone (WX series)
1
MCD2006S (Frequency stable, quartz crystal for reference frequency)
The frequency error range is within ±5ppm,
Wide operating temperature range (-20~+55℃)
HJ4046A (LC for reference frequency)
The frequency error range is about ±20ppm,
Narrow working temperature range (+5~+35℃)
2
Modulation distortion degree <0.3%.
Modulation distortion degree <1.5%.
3
32.768KHZ pilot frequency
Companding circuit
Receive IF processing
32.768KHZ pilot frequency
Compression and expansion circuit (Panasonic dedicated chip integrated AN6444)
Receiving intermediate frequency processing (Panasonic dedicated chip AN6438SC)
4
Multi-channel (supports MCU arbitrary frequency writing)
Multi-channel (can only be equipped with parameter fixed frequency)
5.
Frequency response (wide) 75HZ~20KHZ±3dB).
The maximum frequency deviation is ±75KHz,
S/N: 85dB
Integrated receiver and amplifier
Frequency response 300HZ~10KHZ±3dB.
The maximum frequency deviation is ±40KHz.
S/N: 60dB
Receiver only (requires external power amplifier)
A conclusion can be drawn from the above table. In addition to using dedicated companding and IF chips in the pilot function, Panasonic’s products are more advanced than Maxic, and other aspects such as the use of phase-locked loops, requirements for ambient temperature, modulation distortion, and more Channels, bandwidth, and signal-to-noise ratio have all fallen behind MMIC's products. Therefore, Maxic's products have an advantage in terms of cost performance. Chinese engineers come on, let us in the near future, the overall electronic products can catch up with or even surpass Japan, and let Chinese manufacturing become the symbol of the world's high-quality products.
USB Microphone:https://www.soft-voice.com/
