How does Field strength meter lock into a particular frequency to check its field strength . Say If I intend to use a Log amplifier then how the meter would detect dB level a desired frequency of interest , 315MHz in present case.
If you look in amateur radio literature or publications you'll find numerous field strength meter designs however many are untuned. Dip meters (or what used to be called grid-dip meters) often have a switch to turn off the oscillator and allow use as a tuned sensing meter -- which might serve your needs. As with the FSM there's stuff in amateur radio publications.
It may be possible to use a receiver with an S meter - possibly adding an attenuator to prevent overload.
Hi , Please Please help me with this , TDA5210 FSK receiver which provides peak detection output. This could provide lograthmic data as I could tune this Receiver IC to the desired frequency . Please confirm this ,if ok.
Yes, the TDA5210 could be used as a king of field strength meter.
However, in your first post you state that your frequency of interest is 315Mhz, the TDA5210 operates at 400 or 800Mhz (ish).
So, it does not cover your frequency range.
Yes, the TDA5210 could be used as a king of field strength meter.
However, in your first post you state that your frequency of interest is 315Mhz, the TDA5210 operates at 400 or 800Mhz (ish).
So, it does not cover your frequency range.