The cable is a straight DTE-DCE one. BR is 9600 (8O1).
The yellow LED won't go off until it's communicating with the base
station through the rear 110-pin connector.
Is it connected to an on board COM or through an USB adapter?
On COM1 LH 3.10 starts straight without any command line switches
I went to use my 5370B todayt and noticed the LEDS on the display are slowly
sort of pulsing bright one after another.
Also all the push button LEDS are going on and off one by one.
The strangest thing is that it appears to be working o/k via HPIB.
I don't have extender boards but I do have a
Checked the PSU voltages on the PSU card next to the 10811.
The -5.2 is reading -4.2.
Took a look with the scope and instead of a nice flat DC I see a 4V Peak to
Peak spike @ 100Hz.
Trying to track down a service manual.
Any ideas on this one guys, if the Pass tranny was shorted, it would be a
Check if there is a backup battery: if the setup is retained in RAM it
needs a small backup battery. Others have EEPROM so they don't need
the battery but the EEPROM itself can be faulty.
On Sat, Jul 6, 2013 at 4:34 AM, cdel...@juno.com wrote:
My 3325A is having intermittent resets back to the
C3 (17000uf @ 10v) is open circuit.
Where am I going to get one of those from.
I need some advice here, Should I just use modern low ESR solder lug type
soldered directly onto the board?
Or Should I try and locate a screw terminal type Capacitor?
Obviously, I want to do the best for this timer
Electrolytic capacitors: check them on the PSU, usually they are the
first to look for.
On Sat, Jul 6, 2013 at 12:46 PM, Mark C. Stephens ma...@non-stop.com.au wrote:
Checked the PSU voltages on the PSU card next to the 10811.
The -5.2 is reading -4.2.
Took a look with the scope and instead of
sounds quite typical for a dried out electrolytic cap.
Look for the unregulated -10V that goes into the regulator circuit.
Most likely C3 on the power supply motherboard is dead.
Adrian
Mark C. Stephens schrieb:
Checked the PSU voltages on the PSU card next to the 10811.
The -5.2 is reading
As per my reply to the same question on the HP group, you've identified
the problem so just go for a reasonably close-ish equivalent and replace it!
Regards
Nigel
GM8PZR
In a message dated 06/07/2013 12:18:44 GMT Daylight Time,
ma...@non-stop.com.au writes:
C3 (17000uf @ 10v) is
On 7/6/2013 04:06, Chris Albertson wrote:
But I think in this case it is just a three wire connection but still there
is room for errors like for example is one of them a TTL level and the
other RS-232. Some times you can mix the two, sometimes not.
This is a valid point. My radio will
Hi Nigel,
The only screw type electro can find is 29000uf@10V. it's the same dimensions.
Should I risk the strain on the rectifiers (another 10Kuf is rather a lot)?
Without this timer I am dead in the water so I need to do the right thing
here...
That's why I posted on the Agilent group too,
Correct, C3 (17000uf @ 10v) is measuring 39uf :)
I have a 29000@10V, same dimensions, do you think the rectifiers can hack that
big fella?
1uf is quite a bit more.
Out of interest, this cap was replaced before, it is not a blue Sprague or
Mallory but a grey Phillips Cap.
-Original
Corby,
Have you asked Agilent? Or asked on the Agilent Forum?
I've had some luck there in the past finding obscure documents.
Good luck.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of cdel...@juno.com
Sent: Friday, July 05,
Mark,
I wouldn't replace a 20V cap with an only 10V rated one, especially when
the nominal working voltage is alrady 10V. That would be a very bad idea.
You can always use caps with higher voltage ratings as replacements
which is good for reliability, but don't do the other way.
The exotic
Mark C. Stephens wrote:
Correct, C3 (17000uf @ 10v) is measuring 39uf :)
I have a 29000@10V, same dimensions, do you think the rectifiers can hack that
big fella?
Without a blush!
-Chuck Harris
1uf is quite a bit more.
___
time-nuts mailing
Mark C. Stephens wrote:
Correct, C3 (17000uf @ 10v) is measuring 39uf :)
I have a 29000@10V, same dimensions, do you think the rectifiers can hack that
big fella?
Without a blush!
Except for the 10V part. (Which I missed on the first post)
You have to use a capacitor that is at least 2x
Yeah, I was looking at the local suppliers and comparing items.
They all seem to stop at 10,000uf for the normal places.
I wonder what CR4 is, It's the -5.2 bridge before C3.
I'd better check it too, must be a reason for the second time that caps failed.
I suppose I could replace CR4 with a higher
Most of the Caps I have of that size are around ~1/2 the capacitance but twice
the voltage.
I'll go check the dumpster (...err garage) for some old gear that's due to be
scrapped.
I am going hate myself if I have to part mule a probably working 8568A/B for a
some sort of PSU cap.
Yeah, I see
Running load might not be quite as bad as you'd expect, switching them all
on at exactly the same time would probably cause a nice fat pulse but
perhaps that's a bit extreme:-), allowing an adequate margin though is always
a
good idea.
If you could tap into the supply and get an idea of
You wouldn't even need a UPS, check Google for mains voltage conditioners.
APC's kit, for example, should be available worldwide and they make a
range that, here in the UK anyway, starts for under 50 GBP.
Regards
Nigel
GM8PZR
In a message dated 06/07/2013 13:26:06 GMT Daylight Time,
Hi Charles,
This triggered some thoughts. :)
On 07/06/2013 06:28 AM, Charles P. Steinmetz wrote:
So, for proper operation in +/- TI mode, use external arming to remove
the ambiguity when the trigger events cross from + to - and back, and
make sure you have adjusted the triggering properly for
On 7/5/2013 7:34 PM, cdel...@juno.com wrote:
My 3325A is having intermittent resets back to the power on default
values.
I ran across a reference to service note 3325-18 that relates to it. (my
SN is in the range the note specifies.)
Does anyone have a copy of the service note or know where I
Certainly if you need a full implementation with various control leads
you might have to dig out the breakout box and figure it out. But the
volts / no volts idea is still useful for connecting pairs like RTS/CTS
or DSR/DTR. But I'm surprised how many devices don't use the control
leads.
Re: time-nuts Digest, Vol 108, Issue 29
On Fri, 05 Jul 2013 19:55:42 -0400, time-nuts-requ...@febo.com wrote:
Message: 6
Date: Sat, 06 Jul 2013 00:27:33 +0200
From: Magnus Danielson mag...@rubidium.dyndns.org
To: time-nuts@febo.com
Subject: Re: [time-nuts] Speaking of Costas loops
Not only: consider that most time interval counters have a minimum
measurable interval (Racal 2351 is 2ns) and slowly crossing PPSes can
be a problem to measure when they are about to cross. In my opinion it
is always better to displace the PPSes, easily done when using GPSDOs
and by using stable
http://www.navipedia.net/index.php/WAAS_Signal_Structure
Doppler Shift: The Doppler shift, as perceived by a stationary user, on the
signal broadcast by WAAS GEOs is less than 40 meters per second (?210 Hz at
L1) in the worst case (at the end of life of the GEOs).
Carrier Frequency Stability:
Hi,
For those of you with Trimble Thunderbolts, I thought that you might want
to know about a open source LCD/monitor/controller project that is now
available. James, M1DST designed this project to run on the Netduino
platform. The features are similar to VK4GHZ's commander/monitor with one
Hi Azelio,
On 07/06/2013 05:05 PM, Azelio Boriani wrote:
Not only: consider that most time interval counters have a minimum
measurable interval (Racal 2351 is 2ns) and slowly crossing PPSes can
be a problem to measure when they are about to cross. In my opinion it
is always better to displace
On 7/6/13 8:10 AM, jmfranke wrote:
http://www.navipedia.net/index.php/WAAS_Signal_Structure
Doppler Shift: The Doppler shift, as perceived by a stationary user, on
the signal broadcast by WAAS GEOs is less than 40 meters per second
(?210 Hz at L1) in the worst case (at the end of life of the
On 7/6/13 7:50 AM, Joseph Gwinn wrote:
Re: time-nuts Digest, Vol 108, Issue 29
On Fri, 05 Jul 2013 19:55:42 -0400, time-nuts-requ...@febo.com wrote:
OK. Given that the birds WAAS uses were built for communications
purposes, not timing purposes, I'g guess that their frequency reference
is a
What's the specified tolerance on the 17,000 uF? You probably have quite a
range to work within. If you are lucky, they specified something like
+80/-20% and the 29,000 uF might be OK (measure it).
On Sat, Jul 6, 2013 at 4:18 AM, Mark C. Stephens ma...@non-stop.com.auwrote:
C3 (17000uf @
Re: time-nuts Digest, Vol 108, Issue 35
On Sat, 06 Jul 2013 12:00:01 -0400, time-nuts-requ...@febo.com wrote:
Message: 5
Date: Sat, 06 Jul 2013 08:56:46 -0700
From: Jim Lux jim...@earthlink.net
To: time-nuts@febo.com
Subject: Re: [time-nuts] Speaking of Costas loops (WAAS)
Message-ID:
All:
This is still not going well.
I have tried 3 different computers, 2 running Win7 and one running XP.
the XP machine successfully controls an Icom radio on the same port, so
I know the port is good. I have tried a new serial cable. I have tried
with and without a null modem.
No
On 07/06/2013 06:29 PM, Joseph Gwinn wrote:
Code/Carrier Frequency Coherence: The lack of coherence between the
broadcast carrier phase and the code phase shall be limited. The short
term (10sec) fractional frequency difference between the code phase
rate and the carrier frequency shall be less
Have you put a scope on the Nortel's transmit lead? If it happens to be
putting out data you can at least determine the baud rate and whether
it's TTL or RS232 levels. It might put out some kind of startup message
on powerup.
Ed
On 7/6/2013 10:56 AM, Jim Sanford wrote:
All:
This is still
Is this Trimble Thunderbolt the Nortel-Trimble NTGS50AA board? I had
a problem with the com port of my unit upon removing it from the cabinet
for some improvements. After driving me nuts the problem was caused by
the internal com cable which had a factory reversed connector that was
A lot of the changes from bent pipe to the new system including C-band
uplink is explained here:
http://www.insidegnss.com/node/697
While there, downlink the extended PDF version.
John WA4WDL
--
From: Magnus Danielson
--
From: jmfranke jmfra...@cox.net
Sent: Saturday, July 06, 2013 2:09 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Speaking of Costas loops (WAAS)
A lot of the changes from bent pipe to the new system including C-band
uplink is explained
A lot of the changes from bent pipe to the new system including C-band
uplink is explained here:
http://www.insidegnss.com/node/697
While there, downlink the extended PDF version.
John WA4WDL
--
From: Magnus Danielson
Sorry about the duplicates, email issue.
John WA4WDL
___
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.
Please find the attached schematics in expressPC .sch format for the
following.
WWVB receiver
MAS6180
CMAX CME6005 available from Brent KD0GLS
Remodulator
Digital version using 2 74HC series chips
Analog experimental version using 3 X 2n3904 transistors
What I have run across is that the
Hi,
I have three NKG3141A mini oscillators or crystals. One is marked 52.000 I
think they are all the same, but am not positive. They are of no
particular use to me.
If you want them, drop me an email off-list. First come, first served.
Best,
-John
=
Not yet. Have to find/build a breakout box. Was hoping I'm doing
something stupid with a setting
On 7/6/2013 1:17 PM, Ed Palmer wrote:
Have you put a scope on the Nortel's transmit lead? If it happens to
be putting out data you can at least determine the baud rate and
whether it's TTL
It is a Nortel, but no cables inside -- everything is on 1 board.
On 7/6/2013 1:36 PM, EB4APL wrote:
Is this Trimble Thunderbolt the Nortel-Trimble NTGS50AA board? I
had a problem with the com port of my unit upon removing it from the
cabinet for some improvements. After driving me nuts the
Magnus, you are right, I forgot to mention that without a
time-stamping counter it is better to offset the PPSes. With a time
stamping counter more cases can be treated such as a free oscillator.
On Sat, Jul 6, 2013 at 8:53 PM, Charles P. Steinmetz
charles_steinm...@lavabit.com wrote:
Magnus
On 7/6/13 9:29 AM, Joseph Gwinn wrote:
Code/Carrier Frequency Coherence: The lack of coherence between the
broadcast carrier phase and the code phase shall be limited. The short
term (10sec) fractional frequency difference between the code phase
rate and the carrier frequency shall be less than
All:
I suspected I had some stupid setting wrong . . . . . well, close. Turns
out the port labelled COMM1 is in fact, COMM2. Once I figured that out,
both LadyHeather and TBOLTmon communicate. Now I have to figure out
why, after acquiring a LOCK yesterday, today it is declarning, ANTENNA
Or have I misunderstood what you were saying?
But what happens if, over a day, your DUT 1PPS wanders ahead and/or beyond the
REF 1PPS? This is common with GPS 1PPS boards or with too-accurate house 1PPS
references or when comparing poor quartz with a GPSDO.
One symptom is that all your TI
On 07/06/2013 08:53 PM, Charles P. Steinmetz wrote:
Magnus wrote:
For +/- TI mode, using a separate ARM does not help either, since
either of the channels suffice as trigger, and the relative timing is
resolve dynamically by the counter. For most time, the dead-time will
be hidden, but for
Hi
ANTENNA OPEN = antenna isn't drawing the current it should.
You may have a low current antenna / the sense resistor may be shorted / the
sense ADC is blown.
Fast check - put a tee in series with the antenna. Terminate the open port with
a 200 to 400 ohm resistor. If the problem does not
Hi Azelio,
On 07/06/2013 10:22 PM, Azelio Boriani wrote:
Magnus, you are right, I forgot to mention that without a
time-stamping counter it is better to offset the PPSes. With a time
stamping counter more cases can be treated such as a free oscillator.
Agreed.
Many of the issues can be
How Does that Work Robert?
I mean why out of phase?
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Robert Atkinson
Sent: Sunday, 7 July 2013 12:57 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP
On 07/06/2013 11:02 PM, Tom Van Baak wrote:
Or have I misunderstood what you were saying?
But what happens if, over a day, your DUT 1PPS wanders ahead and/or beyond the
REF 1PPS? This is common with GPS 1PPS boards or with too-accurate house 1PPS
references or when comparing poor quartz with
Hopefully HP Voltage Derated the Cap as well so it can handle our 250V here..
We are across the road from the main transformer for the area so the voltage is
highest at our place, I checked the meter box this morning - it is 255-258V on
all 3 phases, no wonder I am having problems.
On 7/6/13 2:39 PM, Mark C. Stephens wrote:
How Does that Work Robert?
I mean why out of phase?
Then the voltage on the secondary of the buck transformer is subtracted
from the line voltage.
This is a very common thing commercially where you have what's called a
buck/boost transformer to
On 7/6/13 2:46 PM, Mark C. Stephens wrote:
Hopefully HP Voltage Derated the Cap as well so it can handle our
250V here.. We are across the road from the main transformer for the
area so the voltage is highest at our place, I checked the meter box
this morning - it is 255-258V on all 3 phases,
I just checked the HP manual, most of the linear equipment is specified: 240V
+5/-10%
So, I am a little over at 258V here ):
I am going to unplug everything until I can get this sorted out.
Can't afford to lose anything more, in both time and spares obtainability.
marki
-Original
This is an old trick that I learned many years ago. By taking a
transformer, driving its primary from the mains and then feeding that
transformer's secondary voltage in series (either in phase or out of
phase) will either add (in phase) voltage to the transformer primary,
or subtract (out of
Check with your power company. They may be able to switch taps on the
transformer to reduce the voltage. I don't know what the situation is
for you, but in some places power companies can be forced to
repair/replace equipment that they fry due to faults in their system.
Ed
On 7/6/2013 5:14
Yes that is true in Australia, but one has to prove that it is the utility
companies fault.
The main problem is we are right across the street for the main transformer for
the area.
So, the start of the 240V run for the whole neighbourhood basically.
Our switchbox meter has a voltage function
The elephant in the room thing with me is SAFETY :)
I mean, can this be a fire hazard, what about the insulation breakdown on the
secondary winding etc..
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Burt I. Weiner
Sent: Sunday, 7
Using a common filament transformer as a buck/boost reduces
the insulation requirement between the primary and secondary.
It does this by connecting the primary to the secondary.
-Chuck Harris
Mark C. Stephens wrote:
The elephant in the room thing with me is SAFETY :)
I mean, can this be a
On 7/6/13 5:26 PM, Mark C. Stephens wrote:
The elephant in the room thing with me is SAFETY :)
I mean, can this be a fire hazard, what about the insulation breakdown on the
secondary winding etc..
Most transformers have a voltage rating on ALL windings that is greater
than several times
Charles,
On 07/07/2013 12:30 AM, Charles P. Steinmetz wrote:
But what happens if, over a day, your DUT 1PPS wanders ahead and/or
beyond the REF 1PPS? This is common with GPS 1PPS boards or with
too-accurate house 1PPS references or when comparing poor quartz with
a GPSDO.
I generated the
Marki,
I used an old thyratron filament transformer from a computer tape drive to
compensate for low line voltage in Detroit. Even though the transformer was
rated 10A it ran our old room air conditioner just fine. From the core size it
seemed more like a 200W transformer, and it never gave
On 7/6/2013 5:26 PM, Mark C. Stephens wrote:
The elephant in the room thing with me is SAFETY :)
I mean, can this be a fire hazard, what about the insulation breakdown on the
secondary winding etc..
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]
On 7/6/2013 2:39 PM, Mark C. Stephens wrote:
How Does that Work Robert?
I mean why out of phase?
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Robert Atkinson
Sent: Sunday, 7 July 2013 12:57 AM
To: Discussion of precise time and
Hi
Ok, lets *assume* there is some uber secret gizmo in the sat that makes the
unsupervised signal absolutely perfect when transmitted from the sat.
The sat still moves relative to the ground. It's speed is a vector in three
dimensions (up / down , north / south, east / west). Depending on
Hi
It's a rare filament transformer that does not have fairly substantial voltage
ratings on the secondary. They rated them so you could directly heat rectifiers
off of them. That could / would put the full high voltage winding onto the
filaments.
Bob
On Jul 6, 2013, at 9:02 PM, Jim Lux
On 7/6/13 7:23 PM, Bob Camp wrote:
Hi
Ok, lets *assume* there is some uber secret gizmo in the sat that makes the
unsupervised signal absolutely perfect when transmitted from the sat.
The sat still moves relative to the ground. It's speed is a vector in three
dimensions (up / down , north /
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