nortel trible NTBW50AA boards SCPI command access
I have a couple of these boards and I have modified one to access the SCPI command port available on the 'Z-Pack' rear connector.
The addition is simple but effective giving the TSIP front panel serial port plus the "cellular" serial port.
Note that you will now have 2 separate connectors for the different control modes.
One obvious use for the SCPI port could be for NTPD.
The NTBW50AA is lacking 1PPS but has a very accurate 2 Hz pulse ideal for NTPD.
Unfortunately the :syst:stat? command is lacking in the firmware.
If anyone in interested in the details I'll prepare a doc and share?
--marki
Yes, please, Mark and thanks for the offer. I have one of these but
haven't got to it yet.
Don d'Huson
Mark C. Stephens
I have a couple of these boards and I have modified one to access the
SCPI command port available on the 'Z-Pack' rear connector.
The addition is simple but effective giving the TSIP front panel serial
port plus the "cellular" serial port.
Note that you will now have 2 separate connectors for the different
control modes.
One obvious use for the SCPI port could be for NTPD.
The NTBW50AA is lacking 1PPS but has a very accurate 2 Hz pulse ideal
for NTPD.
Unfortunately the :syst:stat? command is lacking in the firmware.
If anyone in interested in the details I'll prepare a doc and share?
--marki
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--
The power of accurate observation is commonly called cynicism by those
who have not got it.
-George Bernard Shaw
Dr. Don Latham AJ7LL
Six Mile Systems LLC
17850 Six Mile Road
POB 134
Huson, MT, 59846
VOX 406-626-4304
Skype: buffler2
www.lightningforensics.com
www.sixmilesystems.com
Mark,
I'm interested also, my board is a NTGS50AA but I think they are be
compatible.
Regards,
Ignacio EB4APL
On 13/09/2013 17:06, Don Latham wrote:
Yes, please, Mark and thanks for the offer. I have one of these but
haven't got to it yet.
Don d'Huson
Mark C. Stephens
I have a couple of these boards and I have modified one to access the
SCPI command port available on the 'Z-Pack' rear connector.
The addition is simple but effective giving the TSIP front panel serial
port plus the "cellular" serial port.
Note that you will now have 2 separate connectors for the different
control modes.
One obvious use for the SCPI port could be for NTPD.
The NTBW50AA is lacking 1PPS but has a very accurate 2 Hz pulse ideal
for NTPD.
Unfortunately the :syst:stat? command is lacking in the firmware.
If anyone in interested in the details I'll prepare a doc and share?
--marki
Hi Mark
On 13/09/13 13:26, Mark C. Stephens wrote:
One obvious use for the SCPI port could be for NTPD.
The NTBW50AA is lacking 1PPS but has a very accurate 2 Hz pulse ideal for NTPD.
2Hz ? I thought it they were a pulse on the even second, thus actually
0.5 Hz ?
I wonder how the PPS Driver in NTP would react to that (either 2Hz, or
0.5Hz pulses). I guess if it really is 2Hz, then one of Tom's PICs
could be used to drop it to 1 Hz
But if it's 0.5 Hz, I wonder if a modification to the ATOM driver
or underlying PPS code would be needed
Or is the 2Hz signal coming off the SCPI port ?
Iain (and yes, like others, I am interested)
Typo - 0.5Hz, coming out of a 74AC74 driven by PAL.
Split off to front connector and "cellular interface" so there is 2 places to pick of 0.5Hz.
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf Of Iain Young
Sent: Saturday, 14 September 2013 5:12 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] nortel trible NTBW50AA boards SCPI command access
Hi Mark
On 13/09/13 13:26, Mark C. Stephens wrote:
One obvious use for the SCPI port could be for NTPD.
The NTBW50AA is lacking 1PPS but has a very accurate 2 Hz pulse ideal for NTPD.
2Hz ? I thought it they were a pulse on the even second, thus actually
0.5 Hz ?
I wonder how the PPS Driver in NTP would react to that (either 2Hz, or 0.5Hz pulses). I guess if it really is 2Hz, then one of Tom's PICs could be used to drop it to 1 Hz
But if it's 0.5 Hz, I wonder if a modification to the ATOM driver or underlying PPS code would be needed
Or is the 2Hz signal coming off the SCPI port ?
Iain (and yes, like others, I am interested)
time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
Hi
Some of the similar boards have lots of 0.5 Hz coming out on differential pairs. I suspect that the easy approach for NTP would be to hack the driver.
Bob
On Sep 13, 2013, at 5:20 PM, Mark C. Stephens marks@non-stop.com.au wrote:
Typo - 0.5Hz, coming out of a 74AC74 driven by PAL.
Split off to front connector and "cellular interface" so there is 2 places to pick of 0.5Hz.
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf Of Iain Young
Sent: Saturday, 14 September 2013 5:12 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] nortel trible NTBW50AA boards SCPI command access
Hi Mark
On 13/09/13 13:26, Mark C. Stephens wrote:
One obvious use for the SCPI port could be for NTPD.
The NTBW50AA is lacking 1PPS but has a very accurate 2 Hz pulse ideal for NTPD.
2Hz ? I thought it they were a pulse on the even second, thus actually
0.5 Hz ?
I wonder how the PPS Driver in NTP would react to that (either 2Hz, or 0.5Hz pulses). I guess if it really is 2Hz, then one of Tom's PICs could be used to drop it to 1 Hz
But if it's 0.5 Hz, I wonder if a modification to the ATOM driver or underlying PPS code would be needed
Or is the 2Hz signal coming off the SCPI port ?
Iain (and yes, like others, I am interested)
time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.