After removing the small onboard pigtail connector that runs from the GPS receiver to the motherboard and
connecting an antenna direct to it I hoped for any improvement - nothing. No satellite shows up
Surprisingly I found that the FURUNO has it's own antenna feeding (4.8 V) independly from the feeding from the motherboard.
11:08:23: $GPGGA,151641,3444.0000,N,13521.0000,E,0,00,00.00,000000.0,M,0036.7,M,,
$GPGSA,A,1,,,,,,,,,,,,,00.00,00.00,00.00
$PFEC,GPtps,020101151641,1,0,1,000000000000,00,00,000000000000,1147,227801
Same situation.
Wilko, that's the risk with this cheap deliveries from China, but to be honest it is the first time I run into trouble.
All my double oven OCXO came from Aliexpress and all perform very well. One of this Trimbles is now
the high stability time base of my HP 53131A and doing very well.