The Unique PSK IMD Meter

Designed By KK7UQ

Uses No Direct Connection To Any Equipment

The IMD Meter designed by KK7UQ is by far the best, easiest and most accurate way to monitor your own transmitted PSK IMD.   The IMD Meter displays your transmitted BPSK31/63 or QPSK31/63  IMD in real time on an easy to read 3 digit LED panel.  There are absolutely no connections to your radio, coax or PC. The IMD Meter by KK7UQ is a true stand-alone IMD Meter with it's own telescopic rod antenna.     
 

Theory of Operation: The transmitted RF signal output from your antenna is picked up by the telescoping antenna on the meter and fed into an AGC controlled wide band RF amplifier.  The RF wave form of the signal is diode detected, then sampled with an A/D converter under control of an on-board micro controller.  The shape of the wave form is then analyzed by the micro controller's firmware, the signal is calculated and the IMD displayed on the meter 3 digit LED readout.

The signal quality is measured by analyzing the shape of the wave form which allows for precise IMD readings to be produced in real time while transmitting both in idle mode and even as you are transmitting text.  It also adjusts to your transmitted signal levels automatically and handles QRP to QRO RF output.  There are no levels to set or knobs to twist here.  Just turn it on and it analyzes and displays automatically.  

The IMD Meter also doubles as a relative HF Field Strength Meter and calibration is approximately

1 dB per unit. 

The IMD Meter is housed in a small hand held enclosure measuring: 2.75H x 4.5W x 1.75D (inches) or 70mm x 114mm x 45mm, and weighs just 5 ounces, or 142 grams. The telescoping antenna extends from approximately 5.5 to 20 inches or 139mm to 508mm. Operating from a 13.8V DC supply (Not Supplied).  The IMD Meter is not a kit, but comes complete built, and tested.

Download the IMD Meter Manual.

IMD Meter £79.00