2
Firmware Upgrade
f.
Apply power to the CY490 SPG. The GPS system should
”Time Lock” relatively quickly (< 2 mins). The GPS
system should “Frequency Lock” within 12.5 mins. (see
separate documentation for explanation), provided that the
SPG is set for “Free Run” operation. The “Power” LED
flashes while the systems searches for satellites, and
changes to steady when the GPS system is “Locked”.
