[time-nuts] Trimble Thunderbolt GPSDO Troubleshooting

[Mark Sims]

Well,  if you think the 5V ref is bad, you could pull the ref chip and jumper 
the logic 5V to its output pad (through a resistor... maybe 1K) to do a quick 
and dirty test.  If the resistor output is dragged down, you know something is 
loading down the ref voltage.                                          
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