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New Spectrum Analyzer

SMILEX2692002

Well-Known Member
Oct 26, 2011
386
103
53
I'm thinking about purchasing a spectrum analyzer.
I have this one in mind.
https://www.tequipment.net/Rigol/DSA705/Spectrum-Analyzers/?OrderItemId=6231334
About six months ago I got tired of having other people do my radio work and I decided to give it a go myself.
I purchased a oscilloscope and a function generator. I also purchased a BK precision frequency counter.
I have a couple bird sample ports that I use with my bird 43p.
I have had good luck using my oscilloscope to see my radios modulation waveforms and set them up properly.
I mostly have 10 meter all mode export radios.
I also stopped worrying about output power of my radios and now care more about spectral purity of my signal.
From my understanding I have to have a spectrum analyzer to verify that my signals are spectrally clean.
I don't really know if I want to invest the 700-plus dollars into one.
I have no desire to work on others radios for a profit either.
From time to time I pick up a used radio and clean up the modulation level if it's flat topping and verify that the radio is transmitting on frequency.
Sometimes I sell them sometimes I keep them.
 

I have a RF sampler that I use to send my modulation information to my ocilliscope. It is connected to my Bird 43 input. The Bird 43 output has a 50 ohm dummy load connected.
The RF sampler has a BNC output. I use a 50 ohm BNC cable connected to the RF sampler and the other side connected to the ocilliscope.

Can this same setup be used with the Spectrum Analyzer when I get it?
The Rigol has a N connection input. I purchased a adaptor to accept a BNC.
To be on the safe side I also purchased a 20db BNC anttenuator if needed?

I assuming the RF sampler also anttenuates the RF since my Radios output power remains the same as measured on my Bird 43 with or without it connected in series.
 
The second thing is to purchase a DC blocker to save the input of your new analyzer. Yes, you can hook it up with your sampler. I have mine hooked that way, tied in with my scope.
Can you point me in the direction of a reasonably priced DC blocker?
 

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