4 Hints for Making Better Microwave Counter Measurements:  Agilent Application Note   (Circuit / schematic design added 6/06)

50 MHz Frequency Counter Voltage Meter and SWR/Pwr Indicator:  (circuit added 7/02)

8 Hints for Making Better RF Counter Measurements:  Agilent Application Note   (Circuit / schematic design added 6/06)

Frequency Counter Module:  The counter is 24 bit and the 24 output are connected to shiftregisters. There is a timer wich produce 2 frequency 2 Hz and 0.2Hz. This two frequency is the measuring time. (The time under wich a measurement should take plase.) In the logic is a divider so the actual measure time will be 1 sec or in the other case 10sec. The "start" signal activates the logic wich let the Fin be connected to the counter. after 1 sec the logic disconnect the Fin from the counter and the "Ready" signal is activated by the logic. If you want higher resolution you can let the 0.2 Hz control the logic. In this case the logic will let the Fin be connected to the counter for 10sec. If you want other measure times you can easy change it. Mostly often i use 0.5 s and I use a prescaler wich divides with 250. This gives me the resolution of 500Hz and I get 2 measurement per second. I find this good enough....  (Schematic / circuit added 10/05)

Frequency Counter using PIC16C5x:  Microchip Application Note - Published 26-Aug-97   (Circuit / schematic design added 6/06)

Frequency Counter:  (Electronic circuit added 4/05)

Get six quick tips to make more accurate frequency measurements:  Agilent Application Note   (Circuit / schematic design added 6/06)

Making Low frequency measurements with a Frequency Counter:  Agilent Application Note   (Circuit / schematic design added 6/06)

Microcontroller Makes Effective Frequency Counter:  11/23/00 EDN-Design Ideas / (Circuit / schematic design added 6/06)

Simplified Analysis of Phase-Locked Loop Capture and Tracking Range (AN 1200-7):  Agilent Application Note   (Circuit / schematic design added 6/06)

Speed test times by utilizing the built-in features of your frequency counter:  Agilent Application Note   (Circuit / schematic design added 6/06)

Transition Counter Gauges Thermal Stability:  01/04/96 EDN-Design Ideas / (Schematic / circuit added 10/05)