[App_rpt-users] RTCM de-emphasis setting

Stephen - K1LNX k1lnx at k1lnx.net
Thu Oct 12 18:01:22 EDT 2017


Lee, good stuff, thank you! I may have to investigate a different audio
path on my radio, detector audio may not be the best choice for my
application, but may be my only option.

73
Stephen
K1LNX

On Thu, Oct 12, 2017 at 12:46 PM, Lee Woldanski <ve7fet at tparc.org> wrote:

> Hi Stephen,
>
> Have a read through http://wiki.allstarlink.org/wiki/RTCM_
> Client#Receiver_De-emphasis  (and some of the other info that is there)
> and see if it answers your questions.
>
>
> Cheers!
>
>
>
> Lee
>
> On Thu, Oct 12, 2017 at 7:40 AM, Stephen - K1LNX <k1lnx at k1lnx.net> wrote:
>
>> I'm going to be deploying a dedicated 900Mhz simplex node soon using an
>> RTCM. I will need de-empasis set, as I will be pulling my audio directly
>> from a discriminator, but I am little unclear as to what the defaults are
>> for de-emphasis.
>>
>> For example, I see this in the RTCM manual:
>>
>> [5678]
>> buflen=750
>> mobile1 = mobp1,adpcm,transmit,*nodeemp*
>>
>> If I just simply leave out "nodeemp" will that perform de-emphasis by
>> default?
>>
>> Waiting on parts to be delivered so I am unable to test anything myself
>> just yet, but just curious if someone has already ran into this and could
>> clarify for me.
>>
>> 73
>> Stephen
>> K1LNX
>>
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>
>
>
> --
> Lee Woldanski, AScT
> VE7FET
>
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