Spurious signals with no antenna
Posted: Fri Jun 07, 2019 12:01 pm
Hello
I'm a new RSP1A user and I've been playing with it to see it's limitations.
I've connected a 50 ohm terminator to see the device noise baseline and I've observed repetitive signals trough the available spectrum.
For example, a spike is at exactly 120.00MHz ( in the air-band ).
It's not affected by the LNA / IF GAIN settings.
The same signal is present with an open input.
I've tested under Windows / Linux with the provided sofware / drivers and custom builds - the signals are present in all cases.
Is it normal ?
Is it some sort of LO leakage ? Or is it generated by the front end architecture ?
I'm a new RSP1A user and I've been playing with it to see it's limitations.
I've connected a 50 ohm terminator to see the device noise baseline and I've observed repetitive signals trough the available spectrum.
For example, a spike is at exactly 120.00MHz ( in the air-band ).
It's not affected by the LNA / IF GAIN settings.
The same signal is present with an open input.
I've tested under Windows / Linux with the provided sofware / drivers and custom builds - the signals are present in all cases.
Is it normal ?
Is it some sort of LO leakage ? Or is it generated by the front end architecture ?