BG7TBL gpsdo master reference info needed

[ehnonymouse]

Hi guys, I just bought the Trimble version of this from ebay / China. There are three LEDs on the front, a red WARN one and red and green labelled ACT.

On turning on the green ACT LED comes on constantly, after a while it blinks slowly, and after a while longer it begins to blink quickly. Eight hours later, I still just have one green blinking LED.

Is it faulty? How do you know when it's locked?

[titi]

Hi ehnonymouse,
To work correctly, GPSDO need an external antenna to receive GPS signals from satellites, this antenna need receive generally minimum 3 Satellites to have enough data to lock the PLL that give you the 10MHz at output.

May be you can found information on this forum:
http://www.eevblog.com/forum/testgear/bg7tbl-gpsdo-master-reference/

Best regards.

[ehnonymouse]

Thank you for the link.