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About AD8307 USB 0-500MHz RF Power Meter
Measurement of transmitter output RF power has never been easier and more precise. AD8307 USB 0-500MHz RF Power Meter allows to measure the power of transmitters from 1nW to 2W. Output is displayed in dBm, Watts (nW, uW, mW and W range) as well as input voltage. USB RF Power Meter is based on popular AD8307 watt meter IC and PIC18F2550 microcontroller. Instead of using LCD display module the meter connects to a PC via USB port and displays measurements on a computer via USB RF Power Meter software. The software settings can be changed to use 10-50dBm attenuator and thus allowing to measure higher RF power than 2W. |
Digital AD8307 RF Power Meter Probe
 AD8307 RF Power Meter Probe can be mounted on a small 1.5cm x 3cm pre-drilled PCB board. To measure output RF power of transmitter connect AD8307 probe input directly to the output of your transmitter (antenna output). AD8307 probe should be connected to USB IO Board by using three wire cable. The three wires provide power for the probe that is drawn from USB port through USB IO Board, ground wire and output that connects to PIC18F2550's PIN2 (A0). For best results AD8307 probe may be mounted in standard two way antenna splitter which could be obtained in a local hardware store. This will provide a nice ground shielding and antenna connector already in place.    |
USB IO Board PCB
 USB IO Board is used to sample voltage from AD8307 chip and pass the information in a digital format to a PC via USB port. The board consists of very few components; mainly PIC18F2550 microcontroller, standard USB Type B connector, breadboard compatibille PCB, 20MHz crystal resonator, two capacitors and two resistors.  |
Installing USB IO Board Drivers
| Before USB IO Board can be used the following drivers must be installed. 1) Download USB IO Board drivers and unzip it. 2) Connect USB IO Board and to your computer using USB cable. 3) Windows will ask you if you want to install a driver. Point it to drivers you unzipped. Windows 2000 / XP Under Windows 2000 or XP you will be prompted twice to install two drivers. On the first prompt please browse and point to MCHPUSB driver folder. On the second prompt please browse and point to USB CDC driver folder. Windows 7 / VISTA Under Windows 7 or VISTA you might be only prompted once to install USB CDC driver if MCHPUSB driver is already installed. 4) After the drivers are installed go to the Device Manager (right click on My Computer and click Properties->Hardware->Device Manager), and look under the Ports (COM & LPT) section, and you should see a new serial port there. Note the COM port number. |
AD8307 USB 0-500MHz RF Power Meter Kit
| We are distributing Power Meter Kit at Electronics-DIY store. The software and drivers are included with the kit. Please see the link for more information. |
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