That is very bad news.
It was promised to have a broadband matching network instead of the very narrow UMTS/LTE optimized one.
Please post detailed analysis of how the final HW and the “HF fixed” HW behave when a signal is sweeped on the 3 RX antenna ports from 100 kHz to 3.8 GHz.
The interesting thing is the behaviour from the antenna input plug to the final I/Q output on the computer.
And then sweeping a signal on the 2 TX ports and look at the output signal on the antennas.
These are the optimized frequencies for the current matching network:
RX1 L = 700 MHz - 900 MHz
RX1 H = 2 GHz – 2,6 GHz
RX1 W = 700 MHz – 2.6 GHz
What does that mean.
How much attenuation do I see if I am in a non optimized frequency?
RX1L is optimized for 700-900 MHz (veeeery small frequency band)
What behaviour will I see if I go outside of that optimal band?
0.95% or 0.05% of the signal that would have made it in the optimized band? something in between?
How does the “HF Fix” worsen the behavior on higher frequencies?
We need information that we can decide weather to cancel the purchase, or go for the HF fix or go for unmodified HW v1.4.
Please give detailed answers, as we need a basis for the decision if we want to cancel or not.
Out of curiosity what were the motives to break the promise to change the matching network to be much more broadband??
How does the frequency sensitivity compare to Ettus USRP and the BladeRF and HackRF.
They use 1 matching network for the entire frequency spectrum they support. How does their sensitivity on certain bands compare to the LimeSDR’s? (when taking into the account everything from the antenna plug on)
Personally I find it sad that we have not been informed earlier that the promise of a more broadband matching network has been broken.