No, Butch is right, the DSP in the 480 is AF.  Here is a clip from the 
480 manual:
" transceiver features a Digital Signal Processing
(DSP) unit to process AF signals. "

73, Steve KW3A




On 6/25/2012 4:03 AM, Michael Thurman wrote:
> no the dsp is int he if ont he 480 and the 2000 main reciever as well    =
> the 2k is total crap on vhf uhf though and I wish I had ogtten a 480 =
> back in the day when i got the 2k  as it failed me for the second time =
> on satellites
>
> On Jun 23, 2012, at 1:03 PM, Butch Bussen wrote:
>
>> Also, the dsp is better in the 590, and it is in the i f, and I =
> believe=20
>> the 480 is in the audio section.  I have both rigs and like them both,=20=
>
>> but I really like the 590.
>> 73
>> Butch
>> WA0VJR
>> Node 3148
>> Wallace, ks.
>> =20
>> =20
>> On Sat, 23 Jun 2012, Howard Kaufman wrote:
>> =20
>>> Audio and roofing filters.
>>> I don't want to get my hands on a 590, because I will love my 480 =
> less I am
>>> afraid.
>>> =20
>>> =20
>
>
>