Description
A power supply design review often stalls on one question: how much ripple does the rail really carry? The Tektronix TPR1000 power rail probe gives a clean answer. It is an active TekVPI probe with 1 GHz bandwidth and low 1.25X attenuation, so small ripple stays well above the scope noise. Its ±60 V offset also lets you center the DC level and zoom in. Lost in HCM supplies it for rental or sale in Vietnam and arranges service on request.
Where the Tektronix TPR1000 power rail probe fits
Buck and boost converters fill a board with switching ripple, edge spikes and load steps. A 1 GHz probe leaves room for that content on many product boards, such as controllers, chargers, gateways and motor drives. In addition, the 50 kΩ DC input draws very little from the rail. So the probe reports the converter’s output rather than changing it.
Listed TPR1000 figures
- Bandwidth: 1 GHz.
- Interface: TekVPI, so check your exact scope.
- Attenuation: 1.25X.
- Offset: ±60 V DC.
- Dynamic range: ±1 V.
- Impedance: 50 kΩ at DC and 50 Ω at AC.
- Coupling: DC or LF reject.
- Kit: TPR4KIT, contents to confirm.
TPR1000 or TPR4000?
Both listings share the same offset, range, impedance and kit. However, the TPR4000 lists 4 GHz instead of 1 GHz. Pick it when you chase very fast load transients on processor or FPGA core rails. For converter ripple and general rail noise, the Tektronix TPR1000 power rail probe usually covers the job.
A repeatable ripple routine
First, probe near the load, not at the regulator output pins. Then set offset to bring the rail to the screen center. Next, pick a vertical scale that fits the ripple inside the ±1 V window. After that, keep the bandwidth limit and scale the same for each run. That way, a change in the trace means a change in the circuit.
Rental or purchase
A rental suits a validation sprint, a supplier audit or a one-off field issue. Meanwhile, a purchase suits teams that sign off rails on every new board. To begin, ask Lost in HCM for a TPR1000 quote and share your scope model, rail voltage and expected ripple. You can also look through other oscilloscope probes, check Tektronix, or contact SMK Vietnam.
Questions on the TPR1000
Can I see ripple on a 12 V rail?
Yes, as long as the rail sits inside the ±60 V offset range and the ripple fits the ±1 V window. Follow the manufacturer’s manual and ratings.
What does LF reject coupling do?
It removes slow drift from the view, so the faster ripple and noise stand out.
Which details speed up a quote?
Your scope model, the rail voltage, the ripple you expect and any tips you need.
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