Re: HP 8566A large amplitude error in 2-22GHz range
|
What you are seeing is normal. As you sweep the whole range, the RBW increases to allow the new band to fit into the same linear width as the previous band. If each range is twice the previous, the noise floor will jump up 6 dB each time (20log2). 73 ¨C Mike ? Mike B. Feher, N4FS 89 Arnold Blvd. Howell NJ 07731 848-245-9115 ?
toggle quoted message
Show quoted text
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Don Bitters via groups.io
Sent: Sunday, December 6, 2020 11:35 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 8566A large amplitude error in 2-22GHz range ? 1) What does the noise floor of the 8566A look like with no signal connected after IP (Instrument Preset). ??? hint: the top of the noise floor from 2-5.8GHz should be flat and about 65dB down from the top graticule,? from 5.8-12.5GHz almost flat and about 60dB down from the top graticule, from 12.5-18.6GHz - tilted up about 4dB and about 54dB down from the top graticule, from 18.6-22GHz - tilted up about 6dB and about 48dB down from top graticule. The gain is stepped up about 6dB for each band from 2-22GHz, which causes the noise floor steps. ? ? ? 2) What happens when you put an external signal from your 8340Bon each of the bands I listed above and then do a PSP (preselector peak - a front panel key)? Better yet put a signal in at the low, mid, and high ends of each band, but not right at the band edge - 100-200MHz above the lower, and below the upper edges will work just fine. 3) What kind of cable are you using to hookup the 8340 and 8566? Is it rated for 22GHz? Don Bitters ? ? ? ?
|
