External 10 Mhz no longer locks under V3.0.27

Cal N3CAL

Mike-VA3MW

Cal N3CAL

Sergey KN7K

Lee - N2LEE

Cal this just a guess but I wonder if they changed the signal level or timing requirements What gpsdo are you guys using.

Sergey KN7K

Cal N3CAL

Lee,

I'm using one of the green BG7TBL's   It's been connected and in use with my 6600 for 15 months.  Only had one issue and that was initially the Peak to Peak voltage was 3.31 volts just over the hardware manual maximum listed.  I padded the signal down to 2 Vpp and no more issues until today when I upgraded?   Voltage checked again today still shows 2.0 Vpp. 

Cal/N3CAL

Sergey KN7K

i do not have a scope to measure Vptp, but connected to the radio 2 hours ago and so far ok. Need to monitor longer and need to attach antenna on permanent spot around the window. Currently it works with antenna at 2 bars.

Since I never used it before, do I need to perform calibration aftet it locked?
Sergey, KN7K

WX7Y

Cal N3CAL

I believe the GPS TAB is only for the Internal GPSDO module you buy from Flex.   It has nothing to do with external 10 mhz reference. 

Cal/N3CAL

Cal N3CAL

Sergey, 

FYI,  the nominal P-P out of the BG7TBL GPSDO is approx. 3.3 Vpp which is right at the Flex max upper limit.  On Version 2.4.9 I initially had issue where 6600 would not boot at all.  I would get a red flash error (fan issue) until I disconnected the external 10 mhz ref.  My P-P voltage was 3.31 V and Flex had me attenuate the signal down to 2.0 Vpp and it's been fine ever since.  I don't know if version 3 will do the same or maybe default back to the TXCO?

Cal/N3CAL

Al K0VM

roger na4rr

Why cant you connect this gps to where the internal GPSDO module from Flex would go.

Lee - N2LEE

Roger that is now how the Flex works. It either has the internal module and interface or the external 10mhz bnc input.

Cal N3CAL

Neal Pollack, N6YFM

Burch - K4QXX

Bill W2PKY

Cal N3CAL