Hello,
Thank you for your interesting about Soft66GPS. --- In [email protected], "drmail377" <drmail...@...> wrote: > 1. Where is the schematic? If you're not going to share it, do you get the > schematic if you buy a kit? > I will upload schematics and PCB layout soon. > 2. Is the $180 price for a kit or is the receiver pre-built? assembled PCB + TAKACHI enclosure with GPS antenna. shipping fee by registered mail is including. $180USD is special price until 2/28. Does anyone want kit? > > 3. The GPS receiver's disciplined NCO can only go up to 10MHz and is not > quadrature. You need to go through 120MHz then divide by four to to receive > through 30 MHz. How are you doing this? I see you set the GPS output ot > 1.8mHz to receive 3.8MHz via NMEA sentence. > ICS512M multiplier is used for 4x frequency of WI125. WI125 can output over 30MHz square wave. it is very clean and stable. > 4. Your site mentions the software sets up a bandpass filter. Does this mean > there is a switchable RF filter on the front-end? The board doesn't look like > it has a filter on it. > BPF selector is built in. I use FST3251. But built in BPF is not so high-performance. There is NO BPF mode for outer filters. > 5. You say there are digital isolators between the boards. Is this to prevent > ground loops? > Yes, Si8430 is used as isolator. USB BUS power is filtered by common mode transformer. It is same with Soft66ADI. Thank you, Miura JA7TDO > Best 73's, David WB4ONA > > --- In [email protected], "netnovel2005" <ja7tdo@> wrote: > > > > Hello, all > > > > My project Soft66GPS will be released soon. using WI125 by Navysync as Lo. > > WI125 is GPS module which can output signal stablised by GPS satelite. > > > > If you are interested in Soft66GPS, please visit my site. > > > > http://zao.jp/radio/GPS/ > > > > best 73 > > > > Miura > > JA7TDO > > >
