| Electronics > Projects, Designs, and Technical Stuff |
| DIY 1.8GHz spectrum analyzer |
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| Theboel:
It's getting better with "eBay ready" parts like that |
| bd139:
Nice job! That's seriously impressive work! |
| erikka:
--- Quote from: Theboel on June 06, 2019, 10:19:37 am ---It's getting better with "eBay ready" parts like that --- End quote --- Well... There are some parts you better not order from eBay. I did receive my share of counterfeits and bad parts. Even from known good suppliers Examples: ADE-11X being relabeled as ADE-25HM Mixer module with -27dB conversion loss ADL5801 module with bad performance Ultra low noise MICC, 10 pcs, all with twice the normal current so they will self destruct within days |
| notadave:
How did you know the ADE-11X could output much lower than 5MHz ? Looks like it is meant for IF of 30MHz. I would not even have had the idea that one could by stuff like that off eBay! Earlier this year I had the idea to make something similar, but for much lower frequency, with DVB-T ICs or an ADC (I did not have the idea to use a sound card thinking they were 44.1kSps and 16bit.) but a 24bit sound card is a great/better solution. I concluded that generating the two LO signals in fine steps and without jitter was too hard. |
| erikka:
Many double balanced diode mixer has one port that can go to DC. The port directly connecting to the diodes. Some mixers have a balun between the port and the diodes, those won't work to DC |
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