Both myself and a few other time-nuts have had a problem with the LCD
Tbolt monitor from /fluke.l/ in China not showing a value for the DAC
voltage. The DAC voltage did appear correctly in Lady Heather and the
tboltmon.exe program, but the LCD monitor would only show 0.. All
other values
Hi,
continuing the queries on LCD monitors on TBolts
The I.Fluke illustrations show a message of one, two or three
satellites only being visible. My monitors do not display this message,
is that because of the mode the TBolt is in?
I tried to find the list of display messages in the KO4BB listing
I have a sneaking suspicion that I know what is going on...
Ages ago I sent the code for my first TSIP parser to someone (can't remember
who... was it Dieder?) who was going to use it in a microcontroller based
tbolt monitor. Fluke's monitor is just a lift of that design. Well, my code
quote: [On the tab Port Settings click Advanced and in that window
uncheck the
box next to Serial Enumerator]
This is a feature of the FTDI driver. Not something generic.
What worked for me was to disable (postpone actually) the Windows PnP
device enumerator for a serial device. It works for
Now that is interesting! I was beginning to wonder whether the problem
lay with not being able to decode negative DAC values, but I had no way
of testing it. Clearly, as the data is processed correctly in other
programs - and the monitor works in all other respects - that does
rather point to
The DAC voltage routine is the worst hack I have ever come up with (that was a
close call)
The processor is an 8051 and the SDCC compiler I used does not have the
floating point math library, so I had to decode the DAC voltage by hand and
it is quite possible that the routine breaks down
Well just in case this helps, the DAC on my Tbolt is currently reading
-0.056013V. As before, it shows up OK on Tboltmon.exe and Lady Heather,
reads all zeroes on the LCD monitor.
And just in case it is of any use, my Tbolt details from LH are:
App: 3.0 27 Jun 2002
GPS: 10.2 14 Nov
Hello Joop,
Thanks for the pointer.
I am slowly achieving the confidence to tackle my XP Pro registry.
Stan, W1LE
On 5/12/2011 4:12 AM, Joop wrote:
quote: [On the tab Port Settings click Advanced and in that window
uncheck the
box next to Serial Enumerator]
This is a feature of the FTDI
Hi Stan,
Do not worry, just go for it, what's the worst that can happen?
;)
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From: Stan, W1LE stanw...@verizon.net
Sender: time-nuts-boun...@febo.com
Date: Thu, 12 May 2011 08:24:28
To:
Forgot to copy the list...
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From: shali...@gmail.com
Date: Thu, 12 May 2011 13:07:13
To: David Bobbettd.bobb...@tiscali.co.uk
Reply-To: shali...@gmail.com
Subject: Re: [time-nuts] Tbolt
Didier,
I suspect that the negative voltage issue might be something of a blind
alley as I would expect more people to be affected than have reported an
issue - nevertheless it's worth a try. Just let me know when you have an
opportunity to use the data and I can provide it. The host PC here
Hi:
The current versions of the iCruze LCD monitor are designed to run from
+12 Volts, not 5 and not 3, see:
http://www.prc68.com/I/ThunderBolt.shtml#iCruze
Ask how I know this.
Have Fun,
Brooke Clarke
http://www.PRC68.com
___
time-nuts
I believe there is an internal 5V regulator that runs the processor directly.
That would be a very bad thing. On the one I have, there are 3 zero ohm
resistors in series with the chip's VDD that should be replaced with 3 1N4148
or equivalent to drop the supply voltage to the chip around 3V.
I have the same symptoms. Two Thunderbolts, #1 has DAC voltage of about (+) 0.4
V. Both Lady Heather and the LCD Monitor read the voltage correctly.
Thunderbolt #2 has a DAC voltage of about –.1 V. Lady Heather reads the voltage
correctly but the LCD Monitor shows: 0.. Tends to make one
That's a good link.
Here's another, to a video presentation that gets into the details of the
Symmetricom CSAC.
http://www.brainshark.com/Steve_FatSymmetricom/vu?pi=691826191dm=5pause=1;
appKey=77
Bill Hawkins
-Original Message-
From: James Fournier
Sent: Wednesday, May 11, 2011 9:25
Hello, group. I've got a Symmetricom TruTime XL-DC, which appears to be
working ok now that I have the proper antenna. However, it thinks the
date is 2031.
Is this a known firmware issue for these boxes?
Thanks.
-Pete
___
time-nuts mailing list --
Hi Pete,
I have a few of these boxes with various different firmware versions.
Some of the older boxes do have known issues with GPS week rollover
and I have seen things labeled on these boxes as Y2K fixes too.
For your particular box there is one setting I think MIGHT make a
difference for
Hello
If it's a rollover problem, you should try 26.09.1991 (which is 1024 weeks
before today).
HTH,
Jean-Louis
- Original Message -
From: Peter Loron pet...@standingwave.org
To: time-nuts@febo.com
Sent: Thursday, May 12, 2011 5:46 PM
Subject: [time-nuts] Symmetricom TruTime XL-DC
That info would certainly increase the chances of it being an issue with
handling -ve numbers. I wonder if anybody on time-nuts has an LCD
monitor which can display negative values?
David, G4IRQ
On 12/05/2011 16:58, Jim Hall Sr. wrote:
I have the same symptoms. Two Thunderbolts, #1 has
19 matches
Mail list logo
