ReviewsTwo Selected Frequency Module

Display Digital Signal Frequency Counter PLJ 6LED H LED Signal Generator Cymometer Tester Frequency Measurement Modules Adjustable Module 0.1~1000MHz(Backlight Font red)

  • Test Accuracy: The frequency meter is designed with dual intermediate frequencies. The intermediate frequency value and the addition and subtraction mode can be preset separately without affecting each other, which can achieve high stability and high resolution. The tester has good sensitivity, better than 60mVPP.
  • Excellent Performance: The frequency reference uses a temperature compensated voltage controlled crystal oscillator. The display driver adopts LED display special chip, the digital tube has high brightness and less external interference.
  • Small and Convenient: This module is compact and exquisite in design, can be put into a pocket, does not occupy extra space, is convenient to carry, and has reliable performance, good visual effects, and low cost.
  • Convenient to Operate: The circuit of the frequency meter is simple, the design structure is reasonable, and the unique two key control method and precise time algorithm are used to make the operation simple and fast.
  • Multi Function: The circuit is simple, the structure is reasonable, double button control, and the operation is simple. Each setting is automatically saved, and the power is on.
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RF Oscillator Module, VCO 515MHz-1150MHz Voltage Controlled RF Oscillator Frequency Source Broadband Oscillator Module

  • [Strong compatibility]:For Yaesu FT-817/857/897 and other models for temperature-compensated crystal components, fully compatible with the original TCXO-9..
  • [High stability]:he frequency is 22.625MHz, which can improve the stability of the machine after replacing the original crystal. It is superior to the original module in different environments..
  • [High cost performance]:The price is only 15% of the original module, and the cost performance is extremely high..
  • [Effect is remarkable]:Actual test the frequency of the crystal is observed with a high-precision frequency meter. The original crystal frequency is deflected with a fire-baked , but this temperature-compensated crystal has no obvious change, and the effect is remarkable..
  • [Simple operation]:Turn off the power of the machine, open the cover of the machine, find the position where the temperature compensation crystal is installed. You need to unplug the ordinary crystal of the machine, then insert it according to the stitching of the machine. After installation, you can start using it without any settings..
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Honeywell LYNX Touch 5210 4.3\ All-in-One Wireless Home and Business Alarm Control System

  • ...audio alarm verification Programming Options stored in EEROM Can be uploaded, downloaded or controlled via IBM-compatible computer using Compass Downloader software and specified modem or via capable GSM, Wi-Fi or IP communications module Intuitive programming interface reduces time and mistakes Programming options selected from allowable list Contextual options, defaults and pre-fills for faster set-up Listings UL 985, UL 1023, UL 1635 CAN/ULC-S545, CAN/ULC- Subject-C1023 ANSI/SIA CP-01-2010 System Power Primary power: plug-in power supply, 110VAC to 9VDC, 2.7A output 300-04705V1 or 300-04065V1 (300-04063V1 in Canada) Four or 24-hour backup battery: rechargeable nickel-metal hydride battery pack rated at 7.2Vdc Operating temperature: 32°F – 122°F (0°C – 50°C) Dimensions (approx) 6.1" H x 8.5" W x 1.71" D (15.5cm H x 21.6cm W x 4.4cm D).
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Retevis RT3S DMR Radio, Dual Band Radio, Digital 2 Way Radio, Dual Time Slot 2000mAh Dual Band Scanning SMS Emergency Alarm, Long Range Handheld Walkie Talkie for Camping Traveling(1 Pack)

  • compatible with digital and analog modes.
  • includes dual band 3,000 channels multiple digital talk groups.
  • quickly switch working modes to adapt to different usage environments.
  • 2m and 70cm frequency bands can be used in urban or suburban areas.
  • different frequency bands can be selected for use.
  • long distance calls such as camping and hiking are available.
  • easy to use interface and digital buttons.
  • allow you to operate without any trouble.
  • manual operation to quickly adjust function and frequency.
  • support SMS function and can write, receive and send information.
  • realize two groups of calls at the same time at one frequency point to improve communication efficiency.
  • dual time slot for repeater or point to point.
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High Speed Comparator High Speed Frequency Meter Front Shaping Comparator for Low-Voltage Applications Conversion Circuit

  • LOW VOLTAGE APPLICATIONS -- The input common mode range is better than the swing input, which is very suitable for low voltage applications..
  • APPLICATION -- Digital module can be used for wide voltage range and periodic signal shaping..
  • FRONT END ADJUSTMENT -- Used as a front end conditioning module in time domain measurements for frequency and phase difference..
  • PARAMETER -- The input voltage is 10 to 1000mV, the input frequency is about 200MHz DC, and the input impedance is 50 ohms..
  • RAIL TO RAIL OUTPUT -- The output level mode is rail to rail output, which can directly drive TTL / CMOS level..
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Synology 5 bay NAS DiskStation DS1019+ (Diskless), 5-bay; 8GB DDR3L

  • Quad-core CPU with AES-NI encryption engine, delivering reading and writing throughput at over 225 MB/s even when data are encrypted.
  • Loaded with two 4GB DDR3L memory module, providing 8GB memory capacity in total.Power Supply Unit / Adapter - 120 W. AC Input Power Voltage - 100 V to 240 V AC .Power Frequency - 50/60 Hz, Single Phase.
  • Built-in two M.2 NVMe SSD slots for system cache support.
  • Dual 1GbE (RJ-45) ports with failover and Link Aggregation support.
  • Dual-channel H.264/H.265 4K video transcoding on the fly.
  • Scalable up to 10 drives with one expansion unit DX517 connected.
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HiLetgo BTS7960 43A High Power Motor Driver Module/Smart Car Driver Module for Arduino Current Limit

  • 5V isolate with MCU, and effectively protect MCU.
  • Voltage indication of motor driver output end.
  • Just need four lines from MCU to driver module (GND. 5V. PWM1. PWM2).
  • isolation chip 5 V power supply (can share with MCU 5 V)..
  • Able to reverse the motor forward, two PWM input frequency up to 25kHZ.
  • two heat flow passing through an error signal output..
  • Isolated chip 5V power supply (can be shared with the MCU 5V), can also use the on-board 5V supply.
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Spectrum Analyzer USB 35-4400M Signal Source RF Frequency Domain Black Analysis Tool with Tracking Source Module Industrial Supplies

  • RF Frequency Domain Analysis Tool. Sweep Bandwidth: 33mHz---4400mHz.
  • Turn on the tracking source output bandwidth 33mhz---3000mhz.
  • Made of fine quality material, the Spectrum Analyzer has a long service life. Small and portable, high accuracy.
  • Signal Source Spectrum Analyzer. Software used on the computer side: NWT4.11.09 version.
  • Computer operating system: Winxp, Win7, Win10.
  • 35-4400M Signal Tracking Source Module is an RF frequency domain analysis tool.
  • Signal Tracking Source Module with Shell. Sweep Step: ≥33-68.75mHz/125Hz, 68.75-137.5mHz/250Hz, 137.5-275mHz/500Hz, 275-550mHz/1kHz,....
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ALMOCN 4 Set 433MHz RF Wireless Transmitter and Receiver Kit High Frequency Super Regenerative Transceiver Module for Arduino Raspberry pi

  • Great influence on the antenna module reception, preferably connected to the 1/4 wavelength of the antenna, typically 50 ohm single conductor. The....
  • Wireless Transmitter Modules allow your Arduino to wirelessly comunicate with other arduinos, or with radio frequency (RF) controlled devices that....
  • Antenna position has also affected the reception of the module, the installation, the antenna as possible straight away from the shield, high....
  • Frequency used to receive, decode and oscillation resistor should match with the transmitter..
  • Application:Usually used for remote control systems, such as Remote control rolling gates, smart car, smart home, etc..
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Monolith THX-265IW THX Select Certified 2-Way in Wall Speaker, 1in Silk Dome Tweeter with Neodymium Magnet and Copper Shorting Ring, for Home Theater, Easy Install

  • Premium drivers high excursion woofers. Silk dome midrange. Silk dome tweeter. Featuring carefully selected drivers that deliver a flat frequency response in the listening window, the THX-LCR features two 6. 5in woofers, a 2in silk dome midrange, and a 1in silk dome tweeter. The silk dome midrange operates in the 550Hz-1. 9kHz range, improving power handling, lowering distortion, and improving the polar response, which allows the speaker to achieve higher SPL..
  • The 6. 5in high excursion Woofers feature a long fiber pulp cone, NBR Surround, and are designed with shorting rings to keep distortion at a minimum. The combined driver design enables the speaker to reach Sonic heights and deliver accurate sound For the best in home theater dynamics and detail.
  • Precision crossover network: The THX speaker series feature carefully selected fourth order Linkwitz-Riley crossover network acoustic filters. This sophisticated crossover minimizes sonic frequency overlap, reduces distortion, and is an excellent choice to minimize off axis response errors near the crossover frequency..
  • Easy install: the heavy duty dog ear mounting system makes for a fast and problem free installation. The magnetically detachable grille is powder coated in white and can be painted to matc....
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2PCS DC-DC Boost Converter, DC-DC 3.3V-13V to +15V/-15V Positive Negative Dual Step-Up Converter Board

  • This boost converter module can convert DC 3.3V~13V to DC ±15V..
  • The boost converter module can output positive and negative voltages..
  • Working Frequency: 400kHz, and the power module is automatically raised and lowered..
  • The boost converter module can be widely used as power supply for for ADC, DAC, LCD, and etc..
  • Maximum Input Current: 1.8A, Maximum Output Current: +Vo 600mA,-Vo 120mA, Quiescent Current: 3-4mA.
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