S-7002/S702/S618 professional one for two true diversity wireless headset microphone

●It adopts a dual-channel single-receiving system with a combination of four antennas, and has developed a unique high-sensitivity diversity selection circuit with excellent anti-interference performance and strong signal reception ability, which can minimize the occurrence of frequency disconnection.
●Dual-channel independent AFS frequency automatic search function, which can quickly scan the frequency with the least interference in the working environment and lock it.
●Professional performance-level phase locking circuit, combined with noise locking squelch control and digital pilot technology, when the transmitter is turned off, the pilot control mutes the AF signal to suppress noise, and at the same time mutes the corresponding receiver.To ensure the effective blocking of interfering signals.
●The backlit LED display indicates the RF and AF signal strength, battery status, diversity channel indication (A/B), frequency, frequency group/channel and other working status.
●The SQ receiving distance is adjustable from -65~-100dBm, and it has an operation lock key function to prevent misoperation.
●It has a high dynamic response and a wide frequency response, which eliminates the noise caused by high frequencies and achieves excellent sound quality.
●Self-developed core technology “VCO and radio frequency circuit” to make the available bandwidth larger and the signal reception more stable.
Receiver index：
Carrier frequency: UHF640~690MHz
Frequency width: 50MHz
Channel: 200CH (in steps of 250kHz)
Oscillation mode: PLL phase lock frequency synthesis
RF stability：±0.005%（-10~50℃）
Frequency adjustment: 1. The operation menu automatically searches for frequencies, and the undisturbed channels can be automatically scanned and locked immediately.
2. By operating the infrared frequency matching button, the transmitter can immediately automatically lock the same working channel of the receiver.
Sensitivity: The offset is equal to 25kHz.When entering–95dBm, S/N>80dB
Maximum offset: ±48kHz
Comprehensive S/N ratio: >102dB
Comprehensive T.H.D：＜0.5%@1KHz
Frequency response: 60Hz~15kHz
Maximum output voltage: 0dBV@45KHz
Output socket: XLR balanced and 6.3 unbalanced
Mute control mode: dual mute control of sound code and noise
Mute adjustment: -65dB~-100dB
Electronic SQ adjustable: eight-stage electronic SQ adjustable (about 30 meters~200 meters distance adjustable)
Power supply: DC12~15V/450~1000mA
Transmitter indicator：
Oscillation mode: PLL phase lock frequency synthesis
Carrier frequency band: UHF640~690MHz
Frequency band width: 50MHz
Frequency adjustment: automatic tracking and locking receiver working channel/manual adjustment
Output power: 15mW
Harmonic radiation: <55dBc
Maximum offset: ±48kHz
Batteries used: two No. 5 (AA) batteries
Head-mounted technical indicators：
Frequency response range: 40Hz-20kHz
Sensitivity: -39±3dB
Impedance: 1.3KW
Maximum sound pressure level:—-dB
Operating voltage range: 1.5-10V DC
Current consumption: ≥0.5mA
Directivity: single directivity
Test conditions: 3V DC power supply, bias resistance 2.21KW