On Monday, we reported about experimenting with the 4-bit mode now available at the station. This allows us to cover up to 190.6 Mhz of continuous bandwidth, four times the amount available using the usual 16-bit mode. Of course, the low-band and high-band filters only allow up to 80 MHz of continuous bandwidth in any of the 100 MHz Nyquist zones, but it does mean that we can use mode 357 to cover fully the frequency ranges 10-90 MHz, 110-190 MHz and 210-244 MHz simultaneously. Also, as reported on Monday, there is an issue with saturation across the peak of sensitivity in the low band.
On Sunday night, we carried out the first ionospheric scintillation (as detailed here) observation of Cas A using 4-bit mode. To alleviate the saturation issue as much as possible, we used the maximum 8 dB attenuation on the signal. The results look pretty good: