That Nortel board you have there looks exactly like the board I got in my
Nortel NTBW50AA GPSTM. You can find the book on-line, look for Dual Voltage
Global Positioning System Timing Module (GPSTM) OEM General Specification.
Yes the power supply is speced from 24 to 48VDC plus or minus. They
Dave,
my opinion is that this big tree around your GPS antenna causing a lot of
trouble
as especially when the tree are wet...
Rgds Ernie.
-Original Message-
From: quartz55 quart...@hughes.net
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent:
I've tried the antenna in all locations within 200' of my room and nothing
makes any difference. I still need to take the unit somewhere there's nothing
in the way and see what it does there.
- Original Message -
From: Erno Peres
To: time-nuts@febo.com
Sent: Tuesday, December
On Tue, Dec 24, 2013 at 9:06 AM, quartz55 quart...@hughes.net wrote:
That Nortel board you have there looks exactly like the board I got in my
Nortel NTBW50AA GPSTM. You can find the book on-line, look for Dual
Voltage Global Positioning System Timing Module (GPSTM) OEM General
True. Actually the book specifies 'Supply Voltage Ripple and Noise' at
350mVP-P (DC to 150MHz) for the 48V and 240VP-P for the 24V. I was thinking
about trying the AC, but I think I'll stick with my linear 30VDC supply. But
you can get one of those switchers for about $20.
Just because it
Brian wrote:
Just because it has a bridge to allow connection of floating +24VDC or
-48VDC doesn't mean it is a good idea to apply AC. The input filter caps
may not be designed to handle the ensuing ripple current. I would tread
lightly in this area.
Not only that, the value of the filter cap
Hi Dave,
Thanks for your post.
I'd like to see some of your LH traces if you don't mind...
Do you mean with the Lady Heather software?
I'll leave it running a while and collect some data.
Yes, I did hesitate running it on AC, but it draws little current and
does seem to be happy enough.
