2.5GHz Frequency Counter
#frequency counter
#2.5GHz
#RF measurement
#signal analysis
#test equipment
#electronics
#high frequency
#precision
#digital display
#oscilloscope
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Phase indication by vectorscope
An oscilloscope capable of displaying in X/Y mode and a reference "LO" signal source are required. In-phase and quadrature reference square wave signals are generated using a divide-by-4, 2-bit ring counter with two D-type flip-flops. To utilize an RF generator...
nixie clock
One of the random devices found in a basement was an HP frequency counter. It is robustly built, functions perfectly, and the manual includes a complete parts list, circuit diagram, and theory of operation. The counter features a 4-digit display...
Precision Oscillator With 20ns Switching
A precision oscillator can be constructed using a quartz crystal; however, with appropriate component selection, it is also possible to build one using an RC (resistor and capacitor) circuit.
An RC oscillator generates an oscillating signal through the use of resistors...
Dual-trace, triggered oscilloscope
This site contains public-domain schematics for a dual-trace, triggered oscilloscope, and some theory. Click on the topic in the table below to see the schematic for that block. I designed and built this oscilloscope in 1986 using the chassis of...
Precision frequency counter tachometer
Precision frequency counter/tachometer. The ICM7207A provides a 1-second gating window along with the store and reset signals. The display reads hertz directly. When pin 11 of the ICM7207A is connected to V+, the gating time will be 0.1 seconds, resulting...
Spike Detector For Oscilloscopes
Dynamic flip-flops ignore pulses at their inputs that are shorter than 40 ns or do not have TTL levels. This means that TTL flip-flops are not well-suited for capturing noise pulses with unknown durations and magnitudes. This issue is commonly...
FREQUENCY COUNTER
Built around an Intersil 7216 frequency-counter IC, this counter features a basic frequency range of 10 MHz, complemented by a 100-MHz prescaler and an additional frequency divider (IC3). This divider further extends the counting range by dividing the frequency by...
Mini Oscilloscope schematic
Probably the best advantage is its very small size and the fact that it can run off the power supply of the circuit being tested. Although it has a low frequency range, it can still be used for most circuits....
Frequency Counter
Built around an Intersil 7216 frequency counter IC, this counter has a basic range of 10 MHz, a 100-MHz prescaler, and an extra frequency divider (IC3). This divider reduces the frequency by an additional factor, as indicated on S7 (refer...