When it is required to make a measurement at a node of an RF circuit,
connecting to the circuit using a normal oscilloscope probe, even on the x10
setting can change the behaviour of the circuit.For those difficult cases, you
need a special, high impedance and low capacitance, probe like Im selling
here. Also you can notice two , soldered in series, capacitors on the input of
probe. It is Hi Q, Low ESR, Hi V (100v according specification). That
capacitors help windstand high DC voltage on the input.
This lot includes assembled and well tested RF probe PCB. It suppose to be
placed in some tube or enclosure. Even old marker pen will be ok.
Also you need solder 50 Ohm coaxial cable to probe output. For people who are
too lazy to do it, they can buy from me http://www..com/itm/332393676082 a
version of the probe with 30cm SMA-SMA cable and an already soldered SMA
connector on probe.
To get accurate results it is important that the ground probe contacts an RF
ground close to the point on the circuit.
So to solder the wire somewhere on the RF probe ground surface and then
connect it to the ground of tested device.
We ship worldwide from Ukraine by Registered Airmail with tracking number. We
ship next business day once payment received. Delivery time depends on
destination and Customs, usually it takes about 15-25 business days