Come on post your project please.... fieldstrength meter
Posted: 20 Oct 2020, 22:02
Still designing and make my radio's
Adjusting the maximum rf output of a transmitter better can be done bij measuring the field strength at some distance. It gives a better indication for the hand held transmitters.
Because I am also Ham operator I combined two instruments in one, in fact three instruments.
1. A sensitive monitor receiver to check for 'foreign'signals on the 27 MHz band.
2. A Dot bar indicator for fleid strength independent of frequency, use for my ham field tranceivers.
3. Bar dot display to show the 27 MHz carrier wave of the transmitter to tune. This bar dot display also shows the modulation depth of the tones that are send for each channel. With extracted antenne the signal can be measured at a distant of about 30 m, if retracted, also of the transmitter, for example 4/5 m. For tuning I use an entena length so the indication is 80 % at aroud 10 m. Of the last situation a short video, 50 % modulation depth.
Adjusting the maximum rf output of a transmitter better can be done bij measuring the field strength at some distance. It gives a better indication for the hand held transmitters.
Because I am also Ham operator I combined two instruments in one, in fact three instruments.
1. A sensitive monitor receiver to check for 'foreign'signals on the 27 MHz band.
2. A Dot bar indicator for fleid strength independent of frequency, use for my ham field tranceivers.
3. Bar dot display to show the 27 MHz carrier wave of the transmitter to tune. This bar dot display also shows the modulation depth of the tones that are send for each channel. With extracted antenne the signal can be measured at a distant of about 30 m, if retracted, also of the transmitter, for example 4/5 m. For tuning I use an entena length so the indication is 80 % at aroud 10 m. Of the last situation a short video, 50 % modulation depth.