I've got an HP X486A X-band WR90 waveguide power sensor, but I don't have a compatible meter, so have no idea if the sensor works. Are there any tests I can do which would at least indicate if it is OK?
I have a 20 GHz VNA and home-built waveguide calibration kit, so I can check the return loss, but would that still be ok if the unit was blown? Someone said one can test these with a DVM, but if so how do I do it?
I basically have no need for this, so want to sell it along with a cable, but I'm aware the sensort often get blown up, so would like to run at least a basic test of functionality.
Dave.
I have a 20 GHz VNA and home-built waveguide calibration kit, so I can check the return loss, but would that still be ok if the unit was blown? Someone said one can test these with a DVM, but if so how do I do it?
I basically have no need for this, so want to sell it along with a cable, but I'm aware the sensort often get blown up, so would like to run at least a basic test of functionality.
Dave.
generally the return loss of a power sensor gives you a good idea whether its blown or not !
also you can check those with a DVM , essentially those sensors contain two thermistors which is either 100 or 200 ohm ( i forgot how much it was on the 432 ), those two form a bridge with 2 other resistors in the meter , download the 432A/B Service manual which will give you a idea of which pins to measure, you should get somewhere around 100 or 200 ohm for each thermistor ( will vary slightly with temperature )