The GPS Time-Machine™/PCE was
a custom product made for a hard- ware manufacturer. It had many of the same
features of the OEM and TM-1, including 1 PPS, a GPS-driven frequency
synthesizer, event time-tag, programmed output pulse, and IRIG B time code
output. The ISA/EISA compatible PCE also had one additional function, and that
was update and correction of the PC's internal clock to within ±0.001
seconds without the use of a TSR.
This product is no longer available. Spectrum shipped more than 400 PCE
products over the lifetime of the design.