Re: [time-nuts] Symmetricom S200 PSU

Check to see if PSU is a symmetricom power supply it MAY be a standard merchant power supply for which replacements are available from newark/digi-key/arrow/ebay etc Content by Scott Typos by Siri On Sep 18, 2017, at 3:21 PM, Clint Jay wrote: Hi Chris, if it's not

Re: [time-nuts] True Position GPSDP + Rb X72

The True Position GPSDO is working, locked to 8 satellites. It's 10MHz output is extremely close to the X72's output. Using an oscilloscope to compare the signals  with a lissajous pattern, there is only a very small, slow movement, barely perceivable. I don't  need to do any calibration to the

[time-nuts] Brandywine GPS Master Clock help

Hi, I picked up a Brandywine GPS Master Clock today at a hamfest and am hoping to get it working. It came with a 3-ring binder with dip switch settings and ASCII command descriptions. Based on prior postings, it seems like it's serial port behaves a lot like their GPS-4 model. My unit had a

Re: [time-nuts] Symmetricom S200 PSU

Opto-isolators degrade with time. The "optically clear" material between the emitter and detector will start turning opaque with time. At least this is what my boss told me years ago. We has a product that used opto-isolators to isolate our circuits from phone lines. After a few years of use,

Re: [time-nuts] True Position GPSDP + Rb X72

I figured it out. It was the ASCII settings, it's working now. - ASCII Sending,  "Echo typed characters locally" - ASCII Receiving,  "Append line feeds to incoming line ends" Thanks,Steve On Sunday, October 1, 2017 8:30 AM, Stephan Flor wrote: I

Re: [time-nuts] True Position GPSDP + Rb X72

I received my True Position GPSDO. I'm testing it.I am connected to it via a rs232 port, and using HyperTerminal on a XP laptop to communicate. I'm getting the boot message "GETVER 12.0.1 BOOT". This may be a stupid question, but how do I get the boot message to stop so I can send the

Re: [time-nuts] Symmetricom S200 PSU

Thanks for the reply Clint. I spent some time on it today with no luck, I do have some more info though… The primary seems ok, there is a steady 329volts DC across the big cap after the rectifier diodes. When you power it up under its normal load you can hear the transformer whistle, which

[time-nuts] In praise of service: PTF

Let me praise the support provided by PTF (www.ptf-llc.com): I obtained a faulty GPS time clock off ebay to replace the one that was burned by a lightning strike on the house. First, the manual is online. Second, the support emails provided by PTF (probably by the owner) allowed me to diagnose

Re: [time-nuts] Weird GPSDO behavior

If I look on the TIC graph it looks like something happen at about + or - 500ns. Could it be that the software change algoritm? Like a ”Jam Sync”. Seems like it tries to get the TIC to zero quick by changing the DAC. Maybe it thinks it gets enough close in frequency and stops and goes back to