[1000mp] Two strange things...

[lhlousek]

Hi Guido

<<<If I listen in CW with the SSB filter (NOR bandwidth), I found that the radio inserts automatically a low pass audio
filter >>>

The audio low pass audio filter effect in CW mode is due to having the IDSP CW de-mod turned on (sub menu item on menu
item 7-7) .  This greatly cuts down the hiss you would hear in CW mode.  You can either turn off CW de-mod or, what I
do, is turn the Width control to 3:00 ~ 4:00 o'clock in USSB CW or 9:00 ~ 8:00 o'clock in LSSB CW to match the
corresponding edge of the IF bandpass to the IDSP audio cutoff.  (This assumes you have two matching or similar Nor
filters.  I'm using two INRAD 1.8 kHz filters.)  This eliminates AGC pumping from signals outside the audio passband.

Lou (AKA Luigi) W7DZN