Description
Two timing signals rarely agree on paper, and a scope screen alone seldom settles the argument. The Tektronix FCA3003 frequency counter gives you numbers you can repeat. It measures up to 3 GHz and resolves single-shot time intervals to 100 ps. Lost in HCM lists it for rental and sale, so a lab can borrow it for a study or buy it for the bench.

From oscillator checks to time intervals
Start with frequency and period to examine an oscillator. Then use time-interval measurements to compare two suitable timing signals. Frequency resolution reaches 12 digits per second, and phase resolution is 0.001 degree. However, resolution is not absolute accuracy, because the timebase, signal quality and trigger settings all play a part.
Tektronix FCA3003 frequency counter at a glance
| Item | Value |
|---|---|
| Series | FCA3000/FCA3100 |
| Maximum frequency | 3 GHz |
| Single-shot time resolution | 100 ps |
| Frequency resolution | 12 digits/s |
| Phase resolution | 0.001 degree |
| Remote interfaces | USB and GPIB |
| Results display | TrendPlot, histogram and measurement statistics |
| Timebase option | Optional oven timebase |
Statistics that show the spread
TrendPlot and histogram views reveal how repeated readings vary. As a result, you can see drift that a single number would hide. Meanwhile, measurement statistics sit beside them on the display.
Wiring input A and input B
First, feed the clock or pulse source into input A through a rated cable. Then connect the second timing signal to input B. However, microwave signals use the high-frequency input where one is fitted. Before you connect anything, confirm voltage limits, termination and grounding. Never wire a counter input straight to mains power.
When to specify the oven timebase
The optional oven timebase matters when you need tighter stability. Tell Lost in HCM the stability and calibration documents you expect. The quote can then match them to the Tektronix FCA3003 frequency counter.
Rent for a study, or buy for the bench
A rental suits an oscillator evaluation or a short timing investigation. A purchase suits a lab that checks clocks every week. In either case, Lost in HCM confirms price, condition and local availability individually.
Request a quote
SMK Vietnam lists this counter for its partner Lost in HCM. To begin, request a quote from Lost in HCM with your frequency range, signal levels and options. More models sit under frequency counters. You can also read about the brand at tek.com or contact SMK Vietnam.
FCA3003 questions
What does 100 ps resolution tell me?
It is the smallest single-shot time step the counter resolves, not a guarantee of accuracy.
Can a script drive it?
Yes. USB and GPIB suit automated setups driven from a control computer.
Do I need the second input?
For time intervals, yes. Connect the second timing signal to input B.














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