Reviews Low Frequency Spectrum Analyzer

USB Logic Analyzer Device with USB Cable 5MHz 24MHz 8CH 8 Channel UART IIC SPI Debug Logic Analyzer Professional Microcontroller Device Network Analyzing Set for Ardu-ino FPGA ARM M100 SCM

...d, otherwise the measured data will be unreliable..
If the logic analyzer works at 24M, the USB device must not only provide a 24M communication rate, but also must ensure that other devices occupy USB resources before the 4 buffers are filled. For these reasons, the logic analyzer cannot always work at the sampling frequency of 24M for a long time, depending on the computer performance, the availability and latency of the USB bandwidth, and other devices that are occupying the USB drive..
The normal working voltage of the logic analyzer is below 5.5V, the voltage below 1.5V will be regarded as low level, the voltage between 1.5V and 5.5V will be regarded as high level, the maximum withstand voltage is 7.5V, so please pay attention to the test Voltage..

【Supported Protocols】Serial Peripheral Interface, IIC, UART, SMBus, I2S, CAN, Parallel, Custom, Search, Async, 1-Wite, PS / 2.
【Multi Purpose】8-channel logic analyzer, Data Logger. PWM controller, Frequency generator. Frequency meter, Remote controller.
【Dual Channel】Dual channel voltmeter, Mixed signal oscilloscopes and logic analyzer, Dual input oscilloscope (single, 16Msps, 3MHz bandwidth).
【Frequency Meter】PWM controller, Frequency generator. Frequency meter, Remote controller.
【100% Guarantee】High quality product, we promise to do everything possible to satisfy all customers. However, if you are not 100% satisfied with our service or our products, simply contact us. We are always at the side of our customers to support and continuously seek new ways to improve.

Professional 15-band stereo Graphic Equalizer for both live and studio applications.
Revolutionary FBQ Feedback Detection System instantly reveals critical frequencies and can also be used as Audio Analyzer.
Dedicated mono subwoofer output with adjustable crossover frequency.
Ultra low-noise audio operational amplifiers offer outstanding sound performance.
Shielded toroidal power transformer for ultra low-noise performance.

DUAL 21 BAND EQUALIZER With Individual LED Indicators..
INPUT/OUTPUT: RCA (4 audio sources), MP3 (1/8'') / RCA (record, main) - Frequency Response: 20Hz-20kHz.
EQUALIZATION POINTS: 32Hz, 63Hz, 100Hz+, 1kHz, 2kHz, 4kHz, 6kHz, 8kHz, 10kHz+ - Adjustment Range: ±12dB.
FLUORESCENT SPECTRUM DISPLAY - Direct / Equalizer function allows option of unfiltered pass-through.
BASS BOOSTER increases the low frequency levels - Loudness Booster increases the low and high frequency levels - Removable rack-mount brackets Included.

NEW UPGRADED VERSION: This Vector Network Analyzer added battery circuit management, more secure. Redesigned PCB, you can connect to mobile phone with....
IMPROVED HIGH ACCURACY: HF VHF UHF Antenna Analyzer Measuring added a shell case, which is protective and dust-proof.The metal shield is designed to....
IMPROVED FREQUENCY ALGORITHM RANGE: Frequency range is 10KHz -1.5GHz .The improved frequency algorithm can use the odd harmonic extension of si5351 to....
MINI & PORTABLE:Upgraded NanoVNA that provides perfect vector network measurement capabilities, tiny and handheld, stand-alone with 2.8-inch LCD....
WHAT CAN YOU GET: Upgraded NanoVNA hostx1, USB Type-C data cable x1, 30mm SMA male to male RG174 RF cable x2, SMA simple calibration kit x1, SMA....

DUAL 21 BAND EQUALIZER With Individual LED Indicators..
INPUT/OUTPUT: RCA (4 audio sources), MP3 (1/8'') / RCA (record, main) - Frequency Response: 20Hz-20kHz.
EQUALIZATION POINTS: 32Hz, 63Hz, 100Hz+, 1kHz, 2kHz, 4kHz, 6kHz, 8kHz, 10kHz+ - Adjustment Range: ±12dB.
FLUORESCENT SPECTRUM DISPLAY - Direct / Equalizer function allows option of unfiltered pass-through.
BASS BOOSTER increases the low frequency levels - Loudness Booster increases the low and high frequency levels - Removable rack-mount brackets Included.

Professional 31-band stereo graphic equalizer for live and studio applications.
Revolutionary FBQ Feedback Detection system instantly reveals critical frequencies and can also be used as audio analyzer.
Ultra-low noise 4580 operational amplifiers for highest signal integrity.
Dedicated mono subwoofer output with adjustable crossover frequency.
Additional sweepable high and low-cut filters for each channel remove unwanted frequencies, e.g. floor rumble, hiss etc..

...a storage(support up to 32GB memory card, not included in the package). The NanoVNA-H4 vector network analyzer is a Hugen Origin that provides perfect vector network measurement capabilities, tiny and handheld, stand-alone with 4-inch LCD display, portable with 1950mAh battery powered or USB powered.
✔️[Improved Frequency Algorithm] The improved frequency algorithm of NanoVNA-H4 can use the odd harmonic extension of si5351 to support the measurement frequency up to 1.5GHz. The 50K-300MHz frequency range of the si5351 direct output provides better than 70dB dynamic, The extended 300M-900MHz band provides better than 60dB of dynamics, and the 900M-1.5GHz band is better than 40dB of dynamics.
The metal shield is designed to reduce the external interference and improve the measurement accuracy.
✔️[Antenna Performance Measurement] The default firmware main function for NanoVNA-H4 vector network analyzer is used for antenna performance measurement. The TX/RX method can measure the complete S11 and S21 parameters. If you need to obtain S12 and S22, you need to manually replace the transceiver port wiring.
✔️[PC Control] Using PC software NanoVNASaver, NanoVNA-H4 antenna analyzer can connect to a NanoVNA and extracts the data for display on a compute....