I have a HP 55300A Telecom Primary Reference Standard that I am using as a frequency reference (10 mhz) in my lab. The unit work well and outputs 10mhz, 1pps, IRIG-B, as well as other telecom frequencies all work ok. The unit has a problem with the Date received from the GPS. After it starts acquiring satellites it sets the date as June 6, 1997. The date does increment each day. This seems to me like a firmware bug. My unit has firmware version 3704-D. From the documentation there are later versions of the firmware to fix Y2K bugs which apparently this unit needs. Anyone know of firmware available for this unit ? Thanks Gary - K5DSR

On 21 January 2017 at 17:29, Gary Neilson <gary@deepskyridge.com> wrote: > I have a HP 55300A Telecom Primary Reference Standard that I am using as a > frequency reference (10 mhz) in my lab. > I suppose this is one of those open-ended questions, but what the definition of a "Primary Reference"? It seems a rather presumptuous name to attach to a GPS frequency source. When I google the part number, I actually get " *55300A* GPS Telecom Primary. Reference Source" but it still have the "primary reference" name in there. Dave