Description
Long ripple captures need a contact that does not move. The Rohde & Schwarz RT-ZA26 pigtail is a 15 cm SMA solder-in pigtail cable for R&S RT-ZPR power-rail probes. You solder its bare end to the rail and its ground, then connect the SMA end to the probe, so the probe stays on the point with no hands needed.
Probe fit and key data
| Item | R&S listing |
|---|---|
| Type | SMA solder-in pigtail cable |
| Length | 15 cm |
| Compatible probes | RT-ZPR20, RT-ZPR40 |
| Order number | 1800.5258.00 |
The R&S product photo shows three thin blue cables, each with a gold SMA plug at one end and a short bare end at the other. However, the listing does not state how many cables one order brings, so confirm the quantity in your quote.
Why solder in on a power rail
A hand-held tip works for a quick look, yet it wobbles over minutes of capture. A soldered pigtail, by contrast, holds the same contact for hours. As a result, ripple, load-step and start-up tests repeat on exactly the same spot. It also frees both hands, so you can change the load or adjust the board while the scope records.
Where the Rohde & Schwarz RT-ZA26 pigtail fits a project
- Overnight or long-run ripple logging on a regulator output.
- Comparing several boards at the same rail, one pigtail per board.
- Start-up and sequencing checks where the probe must be attached before power-on.
- Points under a heatsink or shield where a browser cannot reach in use.
For quick surveys across a board, R&S offers the RT-ZA25 browser kit for the same probes. So the two parts work as a pair rather than as rivals.
Supply through Lost in HCM
SMK Vietnam lists this cable, while Lost in HCM supplies it. Lost in HCM rents and sells the Rohde & Schwarz RT-ZA26 pigtail and arranges service on request. In your request, give the RT-ZPR model, the number of pigtails and your dates. Then request a quote from Lost in HCM. For reference, see the R&S probe accessories page, more oscilloscope probes, or contact SMK Vietnam.
RT-ZA26 FAQ
How long is the RT-ZA26 cable?
Rohde & Schwarz lists a 15 cm length.
Can I reuse a pigtail on another board?
Often you can unsolder and move it, but fine conductors tire with each rework. So keep spares for multi-board work and inspect each one before use.
Which probes accept the Rohde & Schwarz RT-ZA26 pigtail?
R&S lists the RT-ZPR20 and RT-ZPR40 power-rail probes, so other probe types need other parts.
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