24apr23-
sbcables remeasured more accurately, below data should be
discarded.
On 18mar22 felix measured the cable loss in
the sband cables that go from the lna to the postamp chassis
using the fieldfox cable analyzer.
S11 was measured and then the loss was halved since the signal
passed through the attenuation twice.
the plots show
the sband cable loss from the lna
to the postamp chassis (.ps) (
.pdf)
- Black is the polA cable, red is the polB cable
- the top frame has 2 to 10 Ghz
- the bottom plot shows 2 to 3 Ghz.
- The loss goes from 7 to 12 db 2 to 10 ghz with a
larger dip around 8Ghz (down to 20db).
- the loss in the portion of sband that the filter selects
is -7.5 dbm.
- we had previously measured the cable loss by comparing the
output power of the lna and the output power of the cables.
- In this instance we got around 13db loss (this was
before any sband filtering)
processing: x101/220318/12mscable.pro