Toni
If the 2355 is anything like the 2155 it should be very useful. The 2155 has
a selective receiver with 3.1 kHz and 20 Hz IF B/Ws  as well as a wideband
receive function for the full 200 Hz to 620kHz.  Using the 75ohm coax input
one can get the 0dB mark to correspond to -110dBm and read off at least 15
dB below that  reasonably accurately. A tracking oscillator covering the
full range up to 620kHz is included as well.
If you cant get a manual ex Europe somewhere get back to me and I should be
able to help.
73
Dave
ZL3FJ