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Yeah, that's an updated CPU board with a lithium battery. Not super common, but a good upgrade from the original design that put NiCds next to the most expensive/delicate RF hardware. The older 8662As

It has been doing it for like 2 months or so. No abuse or measurement that triggered it (at least not something I recall, it has not been used much lately) Wilko

Another vote for the Quick 861DW - I've had one for a few years, it's always performs very well, no matter if you're trying to reflow a couple surface mount resistors with the air turned way down, or

You may also use a differential probe, it is important to pay attention to the probe's input impedance and the common mode rejection ratio (CMRR) of the probe and oscilloscope. The input impedance of

One type of probe that could be used for this purpose is a passive probe with a bandwidth of at least 500 MHz and a maximum input voltage that exceeds +2 dBm. A passive probe is typically less

Yup, you got point :) I’ll search a resistor to apply that method, ohm law at it’s best. Regards, Ruben

Both SAs and Scopes measure voltage. If a signal level is CORRECTLY specified in dBm, the impedance must be 50 ohms unless otherwise stated. All that is necessary to do is the mathematical conversion

"Chuck Harris" <cfharris@...> writes: Ok, fair enough. I had assumed 2-3 dBm meant into a 50ohm load presented by whatever is downstream of this. If it's 2-3 dBm when you load it externally with

Did this just start out of nowhere or were you testing something? Andrew

If the OP's description of the set point being 2-3 dBm, is accurate, you can do nothing else but use a 50 ohm probe to make the connection. dBm is totally undefined at the arbitrary high impedances of

"Steve - Home" <sw.krull@...> writes: This is about $100 above your target, but I have the Quick 861DW and it's excellent. Matt

I got a GQ electronics 5200 hot air station for under $200 10 yrs ago...but ebay does not show any for sale now. That model has an iron output also. I've since gone to Metcal station for irons, so its

I tried the cheap Sparkfun Hot-Air Rework Station - 303D and hated it. the temperature over and under shoots, build quality and safety (bad grounding) were all issues. It also has no auto shutdown in

I’m considering a hot air soldering tool and am looking for recommendations. I have a bench top Hart 200A with top and bottom heat to do larger parts but I’m looking for a hand held unit for small

Matt - I agree - I was assuming a probe designed for Hi-Z and am unfamiliar with any others. Cheers! Bruce Quoting Matt Huszagh <huszaghmatt@...>:

It also does it when I use the plastic-covered BNC of the original HP probe to "rattle" the BNC input. Wilko

QuotingRubin - You should not need to break the main coil circuit to measure the current - that may affect the stability of the circuit. Look at the main drive circuit. You will find a resistor

"Bruce" <bruce@...> writes: While a FET probe is nice, a suitable high-frequency passive probe (like the PML series) can absolutely work up to 500 MHz and beyond. In fact, you can make them

Does it do that if you try moving the input with a non conductive tool? Or just your fingers? Andrew

I have an interesting phenomenon on my Agilent 54641D MSO. Upon cold powerup the trace of channel 1 is "all wiggly". The wiggliness is highly sensitive to mechanical movement of the BNC socket of