Search found 34 matches

by kb3cs
Sun Apr 07, 2019 8:27 pm
Forum: KerberosSDR
Topic: Quick Start Guide page missing?
Replies: 3
Views: 999

Re: Quick Start Guide page missing?

it moved back to the long-descriptive-name link
https://www.rtl-sdr.com/hydrasdr-previe ... -and-more/

dunno why, though ..
by kb3cs
Sat Apr 06, 2019 9:01 pm
Forum: KerberosSDR
Topic: semi-passive radar
Replies: 12
Views: 2818

Re: semi-passive radar

i think you're going to need specially crafted modulation from the illumination source and pin diode T/R switches.
your echoes won't be doppler-shifted, of course, therefore your measurements will be time delays.
by kb3cs
Fri Apr 05, 2019 7:15 pm
Forum: KerberosSDR
Topic: semi-passive radar
Replies: 12
Views: 2818

Re: semi-passive radar

i used FRS as an example because it is consumer gear and unlicensed. no problem staying legal. the terminated but unshielded end of coax serves well as an RF probe and attenuation is adjustable by the distance to the transmitter's antenna. 1/4 mi is plenty of range for what i have in mind to measure...
by kb3cs
Thu Apr 04, 2019 2:31 pm
Forum: KerberosSDR
Topic: semi-passive radar
Replies: 12
Views: 2818

semi-passive radar

i'd like to invite comments on a possibly not-so-crazy idea for how to use the passive radar capability. the idea is to use my own source of RF (a FRS walkie-talkie, for instance [no modulation FM, 0.5W, UHF band]) to illuminate the field of interest. i suspect a simple sampling probe is enough to p...