The station has two receivers. The SDRplay RSP1 (12-bit, up to 2 GHz) sits on the outdoor antenna and surveys 24 MHz to 1.7 GHz when nobody is listening live; the HackRF One (8-bit, up to 6 GHz) surveys 24 MHz to 6 GHz around the clock on its own small antenna. A channel counts here when a radio saw it in at least 3 sweeps and it isn't that radio's own interference. Strength is dB over each radio's own noise. The two surveys ran at different times and on different antennas, so a difference can be the antenna or the hour as much as the radio.
What running both radios at once has added: Two radios report.
Channels found by both only the RSP1 only the HackRF
| BAND | RSP1 | HACKRF | BOTH |
|---|
Positive: the HackRF heard it more clearly. Negative: the RSP1 did.
| MHZ | WHAT | RSP1 DB | HACKRF − RSP1 |
|---|
| MHZ | WHAT | DB | ON |
|---|
| MHZ | WHAT | DB | ON |
|---|
All measured only, never listened to.
| MHZ | WHAT | DB | ON |
|---|