Licensing adaptive modulation has only been legal (in the US) since Oct 2012, so the vast majority of licensed paths will be licensed for one fixed modulation only.
-----Original Message----- From: Af [mailto:[email protected]] On Behalf Of George Skorup Sent: Thursday, July 30, 2015 5:02 PM To: [email protected] Subject: Re: [AFMUG] stupid FCC license question There are a lot of old telco paths licensed with fixed 30MHz and 128QAM. They usually have large antennas and lots of Tx power. You'll see their receive power in the -20's. I guess they don't want fade. :) On 7/30/2015 3:54 PM, Adam Moffett wrote: > I can't imagine why anyone would have licensed this path this way. > Oh well. > > On 7/30/2015 4:11 PM, George Skorup wrote: >> Yup, fixed. >> >> On 7/30/2015 2:57 PM, Adam Moffett wrote: >>> I'm looking at a path in ULS that only shows one modulation type. >>> I've seen others in the past that will list several modulations. >>> >>> Is this path ONLY allowed to use 16QAM? No ACM permitted? >>> >>> 30M0D7W >>> Baseband Digital Rate (kbps): 132270.0 Digital Modulation Type: >>> 16QAM >>> >> >
