AnsweredAssumed Answered

Analyzer protection when connecting an antenna?

Question asked by sr75pro on Jul 8, 2008
Latest reply on Jul 8, 2008 by dgun
Dear Group,

I'd like to have some advice regarding the typical practice when connecting an antenna (aerial for US purists) to a spectrum analyzer.

I suppose the dangers are
- DC levels
- ESD / static charge of the antenna
- power outside the band you're currently watching (eg you zoom in on some detail and reduce input attenuation to reduce the noise level and simultaneously fry the mixer because you were hit by a radar signa)
- thunder strike  

I should add that the perspective is not to use a 2.4 GHz rubber duck antenna but do scalar analysis of a 10 meter amateur affair.

The prospective protections are:
- a DC block
- attenuators
- diode limiters

The analyzer would be a 70000 series with 70904A 2.9 GHz RF section. It has both DC and AC coupled modes.
I know how to watch for mixer overload.

Again, any advice on how it should be done?

Best regards,