On 10/7/20 1:30 AM, Roy Thistle wrote:
On Sun, Oct 4, 2020 at 03:27 PM, Robin Szemeti wrote:
at a reasonable price?
Well Keysight is selling N8481A Thermocouple Power Sensors for 2334 CDN pesos. Which if you are running business, or running a lab... is... I suppose reasonable. (But then your customers, or the government is paying for it.)
If you're not doing those things... then why do you need the dynamic range, and sensitivity? And, they are not all that accurate anyway... so you have to be able to live with that too.
IMO... to many people buy a cheap HP power meter... and then just have to have a cable and sensor.
But then hundreds of dollars later... what have they got? Unless they can afford several hundreds of dollars more for calibration (every so often)...then they've got a more expensive version of a Bird or Daiwa... with a sensor that is a lot easier to destroy.
You are confusing the usual HP power meter, which reads from about -30 dBm to +10 dBm with a Bird or Daiwa, which read from maybe 5 Watts to about a kilowatt, depending on plug-ins or model. Two different
animals, completely. BTW, I find, in my small sample of two Daiwas and one MFJ, compared to a Waters Dummy-Load Wattmeter, the Daiwas are more accurate.
--doug, WA2SAY, retired RF engineer
