[time-nuts] Re: List Opinion/Suggestion(s)

[Eric Scace]

Hello all —

   I am working on several broadcast radio projects that require a local PTP server at multiple locations. The purpose of PTP in this context is to timestamp audio and related control data. The timestamps ensure proper reassembly at distant locations after transfer over public/private internets.

   The precision and stability requirements are just beyond the reach of NTP.

   Of course, once installed, such a server becomes the on-premises reference for other uses, including frequency reference for transmitters and transmitter monitoring.

   I’m considering the Time Machines TM2500C <https://timemachinescorp.com/product/gps-ntpptp-network-time-server-10mz-output-tm2500/>. At $750 it seems an economical solution — economical enough to install pairs as primary and secondary in critical locations.

   If you’ve any experience with the performance of these units, I’d appreciate hearing about it.

   Thanks.

— Eric

> On 22 Nov 2021, at 19:13, Shawn <comsec at xmtservices.net> wrote:
> 
> Hey Guys,
> 
> I'd like to ask for opinions from the list if I could.
> 
> I have a need to put a couple GPSDOs on some remote locations, 10MHz
> output plus NTP.  Found some Spectracom 9183s as well as some
> Symmetricom XLi units on EBay that look like they'd fill the bill.    
> 
> The 10MHz will be mostly used by some Service Aggregation Routers to
> re-clock some DS1s that are being transported over packet microwave and
> the NTP is for the computers and cameras, the network is closed off
> from external access.
> 
> I'd really appreciate any insights/gotchas/other suggestions that you
> guys may have in this arena.
> 
> Thanks in advance!
> 
> Shawn