Hello,
According to a Nortel specification document (Dual Voltage Global
Positioning System Timing Module (GPSTM) OEM General Specification
Dataset Name: GSBW50AA), this GPSDO is dual voltage and can be powered
either from -48 V or + 24 V systems. Mine is working from a 48 V power
supply but
Hi
The most common way to design this gear is with an isolated supply. That
eliminates a bunch of odd line fault issues. The easy way to check this is with
an ohm meter. If it's isolated (and I'll bet it is) then polarity to ground
isn't an issue. Polarity between the supply input pins is
Open it up, you'll find a bridge rectifier as the first component on the
incoming power.
It's actually much easier to solder straight to the pins of that component,
rather than trying to bodge something together that would poke into the
backplane connector. :)
I know there's a TSIP command for
Nate,
I have it already connected to a 48 V supply according to the vendor
instructions (fluke.l is a vendor with technical knowledge)and now I
removed the PCB from the case that I furnished and found that my unit
doesn´t have such bridge. Instead it have a quite elaborate reversal
power
Date: Sun, 10 Feb 2013 02:08:17
To: Discussion of precise time and frequency measurementtime-nuts@febo.com
Reply-To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] NTGS50AA Power supply
Nate,
I have it already connected to a 48 V supply
Bob,
Thank you for your response. I already have it working with a 48 V
floating supply, as per the vendor info (Bob Mokia, fluke.l), but I
found in the referred documentation that maybe I could use a 24 V power
supply if I need it.
I bought only the PCB, not the original enclosure (too
Hi
I've never bothered to dig into the pps issues on the box. I have just been
using the RF output.
Bob
On Feb 9, 2013, at 8:22 PM, EB4APL eb4...@cembreros.jazztel.es wrote:
Bob,
Thank you for your response. I already have it working with a 48 V floating
supply, as per the vendor info
Subject: Re: [time-nuts] NTGS50AA Power supply
Nate,
I have it already connected to a 48 V supply according to the vendor
instructions (fluke.l is a vendor with technical knowledge)and now I
removed the PCB from the case that I furnished and found that my unit
doesn´t have such bridge. Instead
I looked into the 1PPS/2PPS issue on these Nortel units when I added support
for them into Lady Heather. They do not appear to respond to the commands for
changing to 1PPS. Also, they do not appear to save the oscillator
disciplining parameters into EEPROM (at least using any of the
: time-nuts-boun...@febo.com
Date: Sun, 10 Feb 2013 03:01:13
To: time-nuts@febo.com
Reply-To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] NTGS50AA Power supply
Maybe I didn't explained this quite well, I'm not good writing in English.
So
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