The device is designed to display on the LCD alphanumeric display thevalues ​​of the forward power and the VSWR . For this purpose it should beconnected to the directional coupler of any design, say Tandem-match .The forward voltage must be applied tothe input F, reflected to input R.
Power is supplied from the DC power source with a voltageof 7 to 15 volts.The device is supplied to display thepower of 1250 W ( value depends on the version of the firmware ) . To switchthe display mode of 125 W ( value depends on the version of the firmware ) youmust set a jumper to free holes markedon the board.For proper operation the device requirescalibration. Calibrate the Power Meter reading with trimpot FWR on referenceinstrument. Calibrate the readings SWR by REW trimpot on the reference meterconnected in series to the antenna or using the load with known resistance ,such as 100 ohms. In this case, the VSWR set to 2.0.

Maximum SWR readings 9.9 : 1.Firmware versions :
6 or 60 W fullscale
20 or 200 W fullscale
125 or 1250 W fullscale (standard programming)
180 or 1800 W fullscale

Jumper allows you to set the fullscale value (depending on thefirmware version) .

Please let me know the firmware required, otherwise 1250W version will be shipped.