150 MHz frequency counter - with 26 programmable offset modes

150 MHz frequency counter elektor january 1982 — 1-17 150 MIIIz frequency counter with 26 programmable offset modes The circuit described in this article is a logical extension to the hand-held LCD frequency counter published in the November 1981 issue of Elektor (page 11-18). The two original frequency ranges of 4 MHz and 35 MHz are retained, but a further range allowing a maximum count of 150 MHz has also been included. Furthermore, the circuit here utilises the frequency offset capabilities of the FM77T module to the full, in fact, all 26 of them. The entire unit can be housed in the same Vero case as before, resulting in a very useful and versatile hand-held frequency counter. The LCD frequency counter featured in the November 1981 issue is extremely accurate and very simple to construct. The maximum count of 35 MHz is ideal for use with microprocessor systems and Citizen"s Band (CB) transceivers, but a higher frequency range would be very useful for many other applications....