[time-nuts] Lucent 24361 15 Mhz

Götz Romahn goetz at g-romahn.de
Mon Dec 1 06:15:54 EST 2014


15 MHz is available from J9 on the board (near J8) continuously and is 
switched by U30 ( DG419 analog switch ) from pin 8 to pin 1 if stable 
locked and from there is fed  to the 15 MHz output (J4 on front panel) 
via some amplifiers. Pin 1 is switched to pin 2 ( GND) if unlocked.
Götz.


Am 01.12.2014 03:01, :
> Just started to trace out the 15 Mhz signal internal to the ref1. Top of
> board side near oven and rs422 connector are the power amplifiers and
> output on off control for the 15 Mhz. The signal comes from the bottom of
> the board. J8 is 5 Mhz.
> So will need to take the board out to trace further.
> Not looking forward to that task.
> Regards
> Paul
> WB8TSL
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