I would personally consider those MV89s from Chinese sources as being extra
suspect - a few years back, one of the Chinese surplus vendors had a big
box of them (some removed from PCBs, and others apparently new) that were
identified to me as containing bad ceramic caps and suffering from various
p
I can't claim it's 100%, but all the ones I've seen that had the FEI logo
and the address silk-screened onto the metal case and a single adhesive
label with the serial number have been the old ones. The new units have
two adhesive labels and no screen printing. Note that this only seems to
work f
8-11-2017 at 12:00:00
>
> My RFTGm-II-Rb doesn't seem to mind it isn't getting the @@En messages...
>
> Thanks,
>
> Alan
>
>
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> Behalf Of Peter Bell
&
The board on it's own comes up in a mode that doesn't send anything until
it's initialized. The RFTG-m-XO is responsible for setting up the board.
This is what you see on the RX line after powerup:
Note that this is from WinOncore - the real data doesn't have the (Rx)
prefix and the data is in b
I was involved in some work on industrial controls that used 1588 for
timing. We only needed microsecond accuracy, and it did that easily - the
basic hardware is simple, we were using STM32 microcontrollers with the
DP83640 PHY. Since the MCU required a PHY anyway, the additional cost for
the IEE
Pretty much any industrial Ethernet vendor makes switches that support 1588
- we were using ones from Siemens.
On Wed, Jul 31, 2013 at 1:29 PM, Scott McGrath wrote:
> The only switch I know that supports IEEE 1588 is the Cisco CGS 2520 and
> it was about 10 k before discount. It's intended fo
Tsikada was (maybe still is?) the Russian version of TRANSIT - it used
150MHz and 400MHz carriers, but I'm pretty sure the orbits were (like
TRANSIT) low polar rather than Geosynchronous. You may also run into the
name "Parus" - which was the name of the system before it was released to
civilian u
The situation with the FTDI chips is rather complicated - the early ones
had an optional external serial EEPROM that you could use to change the
device defaults - this was mostly used for changing the VID, PID and device
description string but if you put a serial number in there it's reported to
th
s that HAVE QUICK didn't exist before the ARC-164 got it.
>
> Bob
>
> On Dec 14, 2012, at 9:46 AM, Peter Bell wrote:
>
> > It was certainly one of the very first radios with it - but there was
> also
> > a non HQ version (the most obvious sign was that the synthesizer
tracking GPS/GLONASS receiver in it).
On Fri, Dec 14, 2012 at 7:30 PM, Bob Camp wrote:
> Hi
>
> Ummm…… e….. wasn't the ARC-164 the original HAVE QUICK radio? They
> certainly came out in both HAVE QUICK I and HAVE QUICK II versions.
>
> Yes, that was 30 years ago….
One of the very first time related projects I was involved in was for
synchronizing radios - this was when they were retrofitting HAVE QUICK to
the AN/ARC-164 and wanted a cheap, portable source of TOD data - the GPS
was a 2-Channel Magnavox unit (C/A code only) and they also did the
firmware modif
It's quite amusing that they decided to redact the quantity and unit price
from the sole source letter - but the other document says "we are going to
buy 14 of these" - sort of makes you wonder why they bothered...
On Fri, Dec 14, 2012 at 9:26 AM, gary wrote:
> If you are curious about how the
I used to have some ancient microwave stuff that was marked in "kMc/s"
rather than GHz.
On Thu, Dec 13, 2012 at 6:55 PM, Bob Camp wrote:
> Hi
>
> Shouldn't mus be mili-micro seconds? :)
>
> If you go back far enough you will indeed find gear calibrated in mu (mili
> micro) and uu (micro micro)
Another thing you should be aware of is that they have quite a bit of
hysteresis - so even with the same tuning current the output frequency
might differ by several MHz depending on whether you approached that
setpoint from above or below. The YIG sphere also has a substantial
temperature coeffici
suspect the need to file is unique to the
> DDK
> parts. However, for the savings, I can certainly do some filing.
>
> Joe
>
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> Behalf Of Peter Bell
> Sent: Saturday, November 24,
If you are going to be filing them, then you should wear a face mask - the
base plating on those things (even now) is normally Cadmium. What you
actually want is a MS3106A18-22SW, but it looks like that vendor only
supplies connectors with the default polarization.
On Sun, Nov 25, 2012 at 10:4
I'm not familiar with that unit, but the pinout appears to match the
Efratom LPRO-101 with the exception of the power supply.
On the LPRO, pin 8 is the -ve side of the 24V supply and pin 10 is the
+ve side. The "19V to 32V, 24V nominal" spec also matches the LPRO.
It's possible that there is mor
On Tue, Oct 30, 2012 at 11:00 AM, Joseph Gray wrote:
> I have read that there were a number of people having various USB
> problems. Some related to network, audio, etc. I understand that there
> is work being done on the USB software. I don't know if the latest
> version of Raspbian has fixed thi
When I was playing around with the Raspberry PI, one of the things I
noticed that was the networking seemed to behave rather strangely at
times - not bad enough that you could really say it was broken, but
enough to reduce your level of confidence. Since I have previously
used that SMSC USB<->Ethe
If it's one of those 10-pin 0.1" pitch IDC headers with only 9 pins
installed then the vast majority of them have the same pinout - which
is designed to match with a 9-pin D-type connector using a straight
cable. If you have access to a meter then a quick confidence check is
to verify that the pin
On Wed, Aug 22, 2012 at 11:27 PM, Chris Albertson wrote:
>
> It is very hard to write a divers in software. You have to use assembly
> language and you have to mmake sure that EVERY path in every branch is has
> exactly the same number of clock cycles. And then you have to be lucky
> that you
The software is on ko4bb's site:
http://www.ko4bb.com/manuals/index.php?dir=05%29_GPS_Timing/RFTG-m
Regards,
Pete
On Tue, Aug 21, 2012 at 12:35 AM, Randy D. Hunt wrote:
>
>
>
> Original Message
> Subject:Re: [time-nuts] Lucent GPS and RB pair
> Date: Mon, 20 Aug 20
t
the unit you have was originally being used as part of a CDMA system.
Regards,
Pete
On Thu, Aug 2, 2012 at 8:00 PM, Christoph Kopetzky wrote:
> Azelio Boriani writes:
>
> >
> > OK, so a digital 'scope is needed or, at least, with memory.
> >
> > On Thu, A
My guess is that it's a PP2S / "Even Second" output - that would also match
with the label...
On Thu, Aug 2, 2012 at 5:02 PM, Azelio Boriani wrote:
> OK, it is in the place of the PPS output... can you hook an oscilloscope
> and see if there is any output?
>
> On Thu, Aug 2, 2012 at 10:25 AM, Chr
I think he was winding you up. I lived in China for several years and
dealt with a lot of people that did international shipping, and I have
never heard of this - I have, however, seen a lot of people ship stuff via
HK for cost reasons.
Regards,
Pete
On Tue, Jul 3, 2012 at 4:29 AM, Mark Sims
Where did you get this idea from? Not only is shipping not free, but the
"official" carrier (China Post) is quite expensive - to the point where
many people will either use private couriers (for Chinese internal
shipments) or will courier things to HK and send them via HK post (for
international s
On Fri, Jun 29, 2012 at 5:37 PM, Chris Wilson wrote:
> Thanks, is it worth even thinking about, or is the Kenwood add on
> TCXO module more than adequate? Only reason I ask is I will be using the
> rig as a driver for a microwave transverter.
>
The frequency stability of the oscillator in the tr
Personally, I would be opposed to LS even if they *did* offer to
replace every GPS in the world at their cost. The real issue here is
more fundamental - if you are going to allow people to operate high
power terrestrial based transmitters in a designated satellite
downlink band then what is the po
I suspect a lot of the ebay sellers are buying stuff from Taobao and
just reselling it. For example, this appears to be the original
source of the FE-5680As which were supplied with the OCXO and socket
(although he seems to have run out of OCXOs now)
http://item.taobao.com/item.htm?id=12204039399
Just out of interest, did you remove the connector and the faceplate
or was the board shipped to you like that?
The board I have looks like this:
On Thu, Jan 19, 2012 at 10:10 AM, Rex wrote:
> Back in 2005 I got one of the FE-5680A rubidiums. The one I got came on the
> full original circuit b
One of the regulators (the one that runs the lamp and lamp heater) is
running at 13.8V and has a 500mV dropout voltage, so there is very
little (~ 700mV) headroom. The one that runs the cell heater is about
a volt lower and the one that runs the analog circuits is set to 8.8V,
so has plenty of head
Is this a white box with a heatsink and a pair of BNCs on the front
panel? If so, and it's the same as the one I had, it has an Efratom
FRS in it - I don't know what the external pinout is, but you should
be able to figure it out from the wiring on the oscillator (although I
just removed mine..)
I think lots of people have designed MCU based HPIB interfaces - the
problem is that most of them are, like mine, designed to solve a specific
problem and there is no subsequent incentive to clean up the documentation
to the point where you wouldn't be embarrased to release it to the public
- at l
I can't speak for all of them, but I had a NTPX26AB-06 and that worked with
the Trimble software, but not with Lady Heather.
Regards, Pete Bell
On Jan 13, 2012 1:47 PM, "VK3YV" wrote:
> Hi all, can anyone tell me whether Lady Heather S/W is compatible with the
> ex Trimble CDMA 10 Mhz reference
The pot accessible through the hole in the casing appears is the fine
frequency adjust pot on the older units - on these, it's connected to
an ADC input, but as far as I can see adjusting it does nothing at
all.
There are two screws hidden under the labels that hold the top over on
- you also need
ates the 1PPS, measured at the input pin of the buffer,
> but I want to check everything that can be damaged and replace the failed
> parts.
> So I'll benefit from partial schematics, parts location and identifications
> and all the like. Please share the info that you have.
>
>
You can put me in the "No 1 PPS on pin 6" camp, too - I made extensive
attempts to detect it on the first couple of units (multiple scopes,
even connecting in to an edge-sensitive interrupt pin) and detected
nothing. The other units, I just poked a scope (TDS420A) at it, but
could see nothing.
On
Hi, Joseph
The unit number just seems to be a mechanical serial number - all you
can really say about it is that higher numbers are newer. The most
useful number is the 4 digit prefix on the serial number - this is an
EIA format date code (two digits of year, two digits of week) - all
the units
Just FYI, this current batch of FE-5680As has a different RF
architecture than the old ones - one of the most notable changes is
that although they still have a DDS in them it's not in the output
path anymore - the VCXO now runs at 60MHz, and this is divided down
(in a CPLD) to produce the 10MHz ou
Since I happened to have one of those MeanWell PSUs sitting here, this
is what the terminal strips look like.
Regards,
Pete
On Thu, Dec 29, 2011 at 1:47 PM, Steve . wrote:
> Jim,
>
> I assume something like this:
> http://www.allelectronics.com/make-a-store/item/TS-210/10-POSITION-DUAL-ROW-ST
This appears to be the datasheet - at least, it mentions "OCO500" as
one the previous part numbers for this device.
http://www.vectron.com/products/ocxo/c4550.pdf
I guess the best way to determine the operating voltage is by
monitoring the reference output and trying each supply voltage in turn
u
Hi, Chuck
>From my investigations of the circuits, the only places the 5V goes is
the 74ACT240 next to the D-type connector and the Maxim 3.3V regulator
- he first thing I would check is to apply just the 5V to the unit and
see if the 'ACT240 gets hot - to really confirm it, just lift pin 20
of th
Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> Behalf Of Peter Bell
> Sent: Wednesday, December 21, 2011 5:28 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Efratom FRK - no 10Mhz oscillator
>
> Yeah, t
it is not possible to find an off-the-shelf suitable crystal. Better find a
> crystal coming from an OCXO.
>
> On Tue, Dec 20, 2011 at 7:10 PM, Peter Bell wrote:
>
>> Hi, Don
>>
>> It's been quite a while since I worked on a FRK, but from what I
>> remember t
Hi, Don
It's been quite a while since I worked on a FRK, but from what I
remember the only signals going to that oscillator board are power and
the control voltage. It might be worth checking the control voltage to
see if it's at a plausible value (nominal is 5V, spec range is 1V-16V,
IIRC) - if y
340mA seems really high - all the ones I've seen take about 90mA - and
I would strongly recommend putting in on a heatsink, or at least
bolting it directly to the chassis. In my experience, they don't
actually malfunction when operated without one, but the housing gets
very hot (and, presumably, t
On Tue, Dec 20, 2011 at 1:08 PM, Chuck Forsberg WA7KGX N2469R
wrote:
> It took about 32 minutes to make lock. Before that it was
> cycling between about +75 and -200 Hz.
That seems rather slow - I just checked the 4 units I have here (D/C
0321, 0330, 0342 and 0349) and they all locked in under
of the board. Good eyes.
>
> Ed
>
>
>
> On 12/19/2011 12:47 AM, Peter Bell wrote:
>>
>> Most of the parts (and their grouping) seem the same as the NTPX26AB -
>> which based on my quick play with one seems to have basically the same
>> hardware as a T
That would make sense - when I was using one of the original Palisade
units I remember that once it was tracking it only output the time
packet every 150 seconds - which seemed rather strange for something
that was being sold as a timing device. You could set it up to output
a time packet with eac
I think the Grand Seikos are specified at the same +/- 10 seconds a
year accuracy as that Bulova. They use a slightly different approach
though - it's a standard 32768 Hz xtal, but its thermally compensated.
I don't know of any other watches that use a 262144 Hz xtal on its
own, but there were som
Most of the parts (and their grouping) seem the same as the NTPX26AB -
which based on my quick play with one seems to have basically the same
hardware as a Thunderbolt. The only strange thing I noticed was that
although it would work with the Trimble tbolt software Lady Heather
couldn't recognize
Maybe they used a Cs standard for the original experimental units, but
the first commercial Transit unit I saw (Magnavox MX700?) just had a
big OCXO in it - it was also all controlled by a HP2100 computer and
output the fix data onto a teletype.
The MX1102/1107 (which were pretty much standard equ
I think "scumbag" is the term you are looking for - as an engineer,
there are few things I despise more than people who try to push things
that they know are going to cause problems so they can make money off
of supplying a "solution" to them.
Of course, I'm fundamentally opposed to putting any te
Ah, and I just noticed that you had the H-Maser and Rb marked wrong
On Thu, Dec 15, 2011 at 12:17 PM, Peter Bell wrote:
> 11.0592MHz is another crystal used for accurate baud rates -
> especially on MCUs that had a 12MHz maximum clock (like the Intel
> 8051)
> So is 9.8304MHz - used
11.0592MHz is another crystal used for accurate baud rates -
especially on MCUs that had a 12MHz maximum clock (like the Intel
8051)
So is 9.8304MHz - used on a number of Mototola (now Freescale) MCUs
17.734475 is 4 times the PAL color burst frequency of 4.433619MHz
I'll see if I can think of anyt
It's exactly 52 times the 1.2288MHz reference that IS95/CDMA2K uses -
this may be a coincidence, but I somehow doubt it.
Regards,
Pete
On Thu, Dec 15, 2011 at 3:46 AM, Joe Leikhim wrote:
> I have been watching this thread and may have missed something. My
> questions: What is the purpose of th
berley
>
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> Behalf Of Peter Bell
> Sent: 09 December 2011 13:55
> To: Discussion of precise time and frequency measurement
> Subject: [time-nuts] Anyone know anything about t
Seeing that other post about an Oscilloquartz GPSDO made me wonder if
anyone on here knows about these?
It's a board-level product, which looks very much lile it's designed
to go into some piece of telecoms equipment. Push button switch, 2
SMA connectors and a D-type on the front panel - carrier
Getting the square wave out is easy - if you follow down the trace
from that J8 socket (which is also connected to the output on the
D-type) it goes to a cap - just remove that and solder a jumper across
the pair of pads to the left of it (I.E. closer to the PLD).
Regards,
Pete
On Fri, Dec 9, 2
The short answer is that there are several different versions of the
"FE-5880A" around, but most of the ones that are currently available
at low cost are the ones with "FEI P/N 217400-30352-1" on them. The
significant characteristics of these specific units are:
1) They need a 5V supply on pin 4
On the FE-5680A, there are two mosfets on the lamp housing - one of
them is purely a heater, and the other is the drive FET for the RF
lamp exciation signal. I assume the designers figured it was going to
run pretty hot anyway and they might as well use the heat for
something useful. In practice,
All I can say, on a purely practical level, is that every Rb vapor
frequency standard I've ever seen or worked on (starting with the old
Eframtom FRK) has run the lamp at about 100c and the Rb cell at about
80c - the exact temperatures seem to vary a little depending on the
model, but that's how i
Hi, Steve
Both the lamp and the absorption cell are made out of glass (or
possibly quartz - see attached image). The unit mounted to the
crystal is a PTC thermistor wired directly across one of the power
supplies. I suspect it's just there to heat up the xtal to a
temperature close to it's knee
, beale wrote:
>> [Peter Bell] ...check to make sure that the VXCO is actually sweeping
>> through 10MHz - if not, you can try adjusting C217 to centralise the sweep
>> range.
>
> Thanks Pete, you are exactly right. As mentioned, the VCXO was sweeping from
> 9.999799 t
I tend to agree with this - but it looks like it's already been
opened, which could cause problems.
Some things you can quickly check are that the lamp housing and the Rb
cell shielding are getting hot (use a thermometer, not your fingers!)
and that the lamp is lit by checking for a purple glow at
han 10 microseconds.
>
> Dennis Ferguson
>
> On 29 Nov, 2011, at 18:54 , Peter Bell wrote:
>> Assuming it's just tracking the CDMA pilots, the 1PPS output is likely
>> not aligned with UTC. The problem is that the pilot channel is just a
>> PN sequence with no
Assuming it's just tracking the CDMA pilots, the 1PPS output is likely
not aligned with UTC. The problem is that the pilot channel is just a
PN sequence with no modulating data - so when you lock to it you can
know that your local clock is 19200Hz * 64 chips/bit (1.228MHz) - but
that's all you kno
Assuming it's just tracking the CDMA pilots, the 1PPS output is likely
not aligned with UTC. The problem is that the pilot channel is just a
PN sequence with no modulating data - so when you lock to it you can
know that your local clock is 19200Hz * 64 chips/bit (1.228MHz) - but
that's all you kno
cell that was dead trying to figure out
how the electronics worked seemed less important...
Regards,
Pete
On Sat, Nov 19, 2011 at 8:37 AM, Magnus Danielson
wrote:
> On 11/18/2011 08:45 PM, Peter Bell wrote:
>>
>> The Xilinx chip (which is strictly speaking a CPLD) is programed v
Hi, Bert
1.110V - so presumably the c-field current is about 4.1mA.
Regards,
Pete
On Sat, Nov 19, 2011 at 6:16 AM, wrote:
> Pete
> reading your description of the C field circuit they are not doing any temp
> compensation or adjustment to the C field like other manufacturers. Seems
> like
I haven't used this specific unit, but I have used CDMA based timing
devices - the long term stability is obviously not an issue, since
it's ultimately locked to GPS - the short term stability varies
depending on how many different pilots you can track in your location.
If it's only one, the result
The Xilinx chip (which is strictly speaking a CPLD) is programed via
JTAG - all the required pins are on the test connector on the edge of
the board. In theory, you can also read back the fuse maps using the
JTAG port if the chip hasn't been secured. I haven't actually tried
it, because I expect t
All the pins have things connected to them - but pin 6 seems a little
strange - it's connected to the 'ACT240 (in fact, it goes through 3
sections of the chip in series!) and finally to the xilinx chip - but
none of these signals ever appear to do anything and the output is
just constant high. It'
I suspect its just because he has too many of them. It's completely
unrelated to the Rb oscillator.
On Nov 18, 2011 11:47 AM, "Chris Albertson"
wrote:
> I'm going to have to buy one of these, can't resist the price.But
> am I missing something? Why is he including a "free" 63.8976Mhz
> OXC
OK, I just managed to get some spare time to have a look at this, and
here are some conclusions:
1) The fine frequency adjust pot is not connected to the c-field
circuit. All the connections to it go across the board to the MAX1246
ADC chip. The track is wired between ground and the vref output o
One immediate thought based on the fact that the PSU has a BABT
approval sticker and "Made in the UK" on it - is this designed for a
230V supply?
Regards,
Pete
On Thu, Nov 17, 2011 at 9:53 AM, Brooke Clarke wrote:
> Hi:
>
> Looking for any documents or other information on the subject GPS simu
The ones with the 2 labels have a date code as the 4 digit prefix on
the S/N - so a unit that says "S/N 0416-756124" was made in week 16
2004. All the ones I've seen date from 2003 or 2004.
The board they were originally attached to was largely empty -
although it did have a label indicating that
Yes, I'm quite sure this is how it works - if you scope the snap diode
drive you can quite clearly see both the 60MHz and the 5.3MHz from the
DDS chip mixed together. My assumption is that the DDS output is
subtractively mixed with the 114th harmonic of the 60Mhz inside the
cavity: 60*114 = 6.840
I can let you know what I've found out about these units - I got given
a couple of dead ones and did a bit of poking around trying to get
them working. I didn't get that far, since one of the units was
easily fixed (the MAX882 3.3V regulator had failed) and the other
seems to have a faulty Rb abso
Alberto di Bene" wrote:
> On 11/10/2011 11:02 PM, Peter Bell wrote:
> > Assuming it's the same as the units I have (two labels, with "FEI P/N
> > 217400-30352-1" on the upper label and two barcodes on the lower
> > label) then the +5V supply runs all th
ite a bit nicer than the old units.
On Nov 11, 2011 6:32 AM, "WB6BNQ" wrote:
>
> Peter,
>
> Is the 10 MHz output a clean sinewave or does it look kind of trashy ?
>
> thanks,
>
> BillWB6BNQ
>
>
> Peter Bell wrote:
>
> > Assuming it's the
As far as I can see, the trimpot has no effect at all - the only frequency
trim on the unit is via the RS232 interface on pins 8 and 9 of the
connector I suspect this is adjusting the c field, but have not actually
verified this. It does definately change the output frequency, though.
On Nov 11, 20
Assuming it's the same as the units I have (two labels, with "FEI P/N
217400-30352-1" on the upper label and two barcodes on the lower
label) then the +5V supply runs all the logic in the unit. There are
no special power sequencing requirements, but you need both supplies
for the unit to operate. T
> Next time I have the unit open I will take a look. Are there obvious
> markings to distinguish the boards (it's a board and not a box), as I recall
> looking but no seeing any.
It's been a while, but from what I remember the boards look almost
identical - the standard configuration has a part o
> Yes, that in consistent with what I'm seeing, Pete, thanks. I am told that
> the actual receiver is a Trimble SVeeSix, so why I occasionally see eight
> reports from the Rapco firmware I don't understand.
Ah, I didn't realize this was based on the Trimble board - I was
having a mental seizure a
Assuming it's using a timing-optimized receiver, the lack of a clear
view to the sky is probably the biggest problem. Once they have a
valid almanac, they will normally select the satellites with the
highest elevation angles - and if you have an obstructed view that
might well include several that
efore were obviously broken just by visual inspection - and this
one looks fine. It is rather amusing to compare the size of this cell
to the ones that were in the old Efratom oscillators, though.
Regards,
Pete
On Tue, Nov 1, 2011 at 9:19 AM, Magnus Danielson
wrote:
> On 10/31/2011 04:57 P
Thank you Gerald - it does look very similar - the only obvious
difference is that the FE-5680A has an LM2941 subregulator on the lamp
supply that does not appear to be in the 5650 - hopefully I won't have
to remove the lamp, since it sounds (and looks) like a rather fiddly
job. On both these unit
That FE-5680A (the "non-programmable" one) is the same as the 2 units
I have - I have seen the "heat a lamp with a heat gun" trick before
when I was playing with the FRSs - but in this case the actual lamp is
fine - the problem seems to be with the absorption cell (or possibly
the other one, which
> Sent: Wed, Oct 12, 2011 16:53:04 GMT+00:00
> Subject: Re: [time-nuts] Lucent RFTG-m-XO GPSDO
>
> On 10/11/2011 6:28 PM, Peter Bell wrote:
>>
>> For some reason, the "No GPS" LED is back - although the GPS is
>> tracking 8 satellites in 3D mode and according
r.
>>> Its in the first few pages of the 5065 manual and you can get that at the
>>> several sites free.
>>> Its rb flooding as I recall. I remember the pix.
>>> It explained what it is and what to do. I think there was a recovery
>>> procedure.
>>>
It just occured to me that if anyone knew the answer to this, they
would likely be on this list.
I remember that when you put the HP5065A into storage, you were
supposed to unplug a little cable from the Rb cell and wire it up to
an external power supply - does anyone know exactly what this did, w
:01 AM, k4...@aol.com wrote:
> Peter, that's good news. Sounds like you have a plan. I am sending a CD to
> KO4BB to put the drawings and softwre on his site where everyone can download
> it. Regards, Doug, K4CLE
>
> Connected by DROID on Verizon Wireless
>
> -Orig
27;s doing
the right thing.
Looking at the "negative sawtooth" page in WinOncore it's showing
about +/- 40ns of jitter and tracking nicely.
So I guess i had better start working on the Rb :)
On Wed, Oct 12, 2011 at 9:33 AM, Peter Bell wrote:
> For some reason, the "No GP
erizon Wireless
>
> -Original message-
> From: Peter Bell
> To: Discussion of precise time and frequency measurement
> Sent: Tue, Oct 11, 2011 12:49:45 GMT+00:00
> Subject: Re: [time-nuts] Lucent RFTG-m-XO GPSDO
>
> The Rx was defective - I just got the new one, hooked it up
erizon Wireless
>
> -Original message-
> From: Peter Bell
> To: Discussion of precise time and frequency measurement
> Sent: Tue, Oct 11, 2011 12:49:45 GMT+00:00
> Subject: Re: [time-nuts] Lucent RFTG-m-XO GPSDO
>
> The Rx was defective - I just got the new one, hooked it up
I would suggest you use RS422 for best results. I use a little
> RS422-4S232 converter which has worked fine for me.
>
> The early units had FRS rubidiums in them. The LPRO was used in the newer
> units. So, you have the more recent design.
> Connected by DROID on Verizon Wir
laced the
> hardware. The VM needs to be allotted RAM. Kind of messy. However, this is a
> good experiment, presuming I can uninstall this VM.
>
>
>
>
>
> On 10/11/2011 12:51 AM, Peter Bell wrote:
>>
>> Thry are two different things - you're talking about the co
Thry are two different things - you're talking about the compatibity
mode built into the OS, but the other poster is talking about "Windows
XP mode" - which is basically a copy of XP running inside a Virtual PC
VM that's available as a download for the "business" variants of Win 7
(which are, not c
cs
business, but I really like to use official docs if possible :)
Regards,
Pete
On Mon, Oct 10, 2011 at 1:01 PM, randy hunt wrote:
> There are scans of the L-Pro service manual out there. Google should help
> here.
>
> Randy
>
>
>
>
>
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