Hi,
Sorry for this late response but I was away from home.
I did the 1 PPS mod a year ago. I just cut the trace between TP14 and
U405 pin 6 and soldered a wire between TP14 and TP33.
Now you have 1PPS on the former 9.8304 MHz output. Not being a cellular
tower operator I did not have any use
Pretty much all the telecom GPSDO's are driven by an on-board, isolated DC-DC
converter. Some are 24V nominal input, some are 48V (a few are even 18-72V).
The '+' / '-' designation is pretty much irrelevant since the converter inputs
are isolated and are not referenced to chassis ground...
Just picked up a 48VDC via suggestion from Mr. Sims from BG Micro, as he
was correct... It will function on 24VDC or -48VDC and I have to put
another connector on it and/or add a power receptacle on the Nortel box
(just reverse the polarity on one or the other).
I agree that having Multiple
The NTBW50AA (and most other telecom GPSDO's) will run on 48V. This will
solve your problems for dirt cheap. They are very high quality
industrial/medical supplies (not cheap junk wall-warts) that currently sell
from distributors for over $80.
Hi
You can get a very good industrial 24V supply for < $40 (and maybe < $20) brand
new from distribution. Comes with a 3 year warranty and has all the various
protection
things you would want on a supply. My claim is that you will always have 12V,
24V
and 48V “stuff” running around. Having a
1) Need a 24 VDC power supply. Am considering just buying an Astron
VLS-35M Adjustable Voltage/Current supply (5-32V/1.5A to limit) since I
don't own a variable power supply yet, this is a linear, and the same
size package as my RS-70M. I can worry about a dedicated supply later
if I decide to
