[Correcting my earlier comment.]
> You could probably add a diode to make it work.
It takes more than just a diode.
The voltage on the modem control signals is probably too high. You will also
need some way to drop it to what the chip expects, probably 5 volts. Simple
3 pin regulators need
And once you get it working... Lady Heather speaks to Acron Zeits! You should
configure the clock to UTC mode or lie to Heather about the time zone offset...
Heather wants the input device to send UTC or GPS time. The satellite map
shows a single "satellite" near the horizon at the azimuth
timen...@philipjackson.com said:
> I'm wondering if something like this $10 item
> http://www.nulsom.com/datasheet/NS-RS232_en.pdf
That setup has a separate pin (hole?) for power. It's setup to expect Gnd,
Tx, Rx, and Pwr from the TTL side.
A previous message said the module designed for the
> Or would I need to find an similar device which inverts the incoming logic
> first?
It's not just inversion but also level shifting. Many battery operated devices
run from a dual or even single AA battery. The custom serial adapter shipped
with these units handles the conversion of 1.5 or
the inversion on the clock board.
Philip
- Original message -
From: Gregory Beat <w...@icloud.com>
To: time-nuts@febo.com
Cc: paul.alfi...@gmail.com, timen...@philipjackson.com
Subject: Re: [time-nuts] RS-232 Pin Outs for the Acron Zeit WWVB LCD ClockDate:
Sat, 22 Jul 2017 12:33:01 -0400
The LM-358 Op-Amp is used to Invert the Serial Data (RxD, TxD) stream.
http://www.st.com/content/ccc/resource/technical/document/datasheet/61/46/87/01/98/ed/44/c5/CD0464.pdf/files/CD0464.pdf/jcr:content/translations/en.CD0464.pdf
Coupled with the usage of an RJ11 (4P4C, modular) ...
I thought I could answer this question easily, since I had the cable right
at hand. But my continuity detector gave strange results.
I opened up the D-shell and found a small circuit board with diode,
capacitors and what looks like an ST358 op amp.
Paul Alfille
On Fri, Jul 21, 2017 at 4:27 PM,
Does anyone have the serial pinout info for the Zeit clock?
I have the clock but have mislaid the factory cable so will need to make
up a replacement RJ11 to 9 pin D-sub cable.
It would save me time if someone has already identified the TX, RX and
Ground connections on the RJ11 socket.
Thanks.
To Hal Murray,
I checked my Z3801A and it was already set up for RS-232, regardless, I
finally figured out my problem. Running a Z3805A and a Z3801A side by side
can lead you down the rabbit hole. The Z3805A port settings are 9600,N,8,1
while the Z3801A uses an unusual 19200,O,7,1. It just
I am sure this has been covered, but I did have much luck in the archives.
I have an HP Z3805A with the nice faceplate and 6 leds on the front. I also
have a Z3801A also with 6 LEDs. What is the difference in the com ports?
The Z3805A works fine with a standard 25pin to 9 pin adapter. The
I have an HP Z3805A with the nice faceplate and 6 leds on the front. I also
have a Z3801A also with 6 LEDs. What is the difference in the com ports?
The Z3805A works fine with a standard 25pin to 9 pin adapter. The Z3801
does not. ...
The Z3801A comes setup for RS-422. The board is
A while back some of the folks on the list were discussing RS-232 interfacing.
I may have something useful for those of you still wrestling with the problem.
An RS-232 interface (Male or Female DB-9) that can take any voltage from 1.8 to
5V (nominal) and turn it into full RS-232 levels at
On Mon, Aug 05, 2013 at 06:35:25AM -0700, M. Simon wrote:
A while back some of the folks on the list were discussing
RS-232 interfacing.
I may have something useful for those of you still wrestling
with the problem. An RS-232 interface (Male or Female DB-9)
that can take any voltage from
...@13thfloor.at
To: M. Simon msimon6...@yahoo.com; Discussion of precise time and frequency
measurement time-nuts@febo.com
Sent: Monday, August 5, 2013 2:06 PM
Subject: Re: [time-nuts] RS-232 interfacing
On Mon, Aug 05, 2013 at 06:35:25AM -0700, M. Simon wrote:
A while back some of the folks
On 26/07/13 15:06, Jim Lux wrote:
And, in some cases, moving the timing critical operations off to a
separate device is going to be the wisest plan. The Roland MPU401 Midi
box was one of the first to do this, back in the DOS days.
It was a pretty crappy CPU, but sufficient to do the task.
There are other timing issues involved too.
Many radios still use relays to switch from transmit to receive. (PIN
diodes only in the more expensive ones). The radio receives a key
closure but delays RF output from 8 to 20 ms or more to allow time for
relay closure. This time delay becomes
Hal,
I like your term automagically. Typo or intentional, it describes
how most people 'understand' technology.
Mike
On 7/26/2013 8:07 PM, Hal Murray wrote:
ma...@non-stop.com.au said:
It you can figure out how to raise DTR while your application has the port
open it can be a good
...@febo.com] On Behalf
Of Bob Camp
Sent: Saturday, 27 July 2013 11:16 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] RS 232
Hi
If the driving program is written using the standard DLL's / libraries it's
directly under control of that program. It's state
: Thursday, 25 July 2013 11:39 PM
To: time-nuts@febo.com
Subject: [time-nuts] RS 232
Since joining time nuts over four years ago I have not used a single MAX
232 chip. Two reasons MAX do not give me isolation and do generate noise
in critical applications. I prefer the use of two H11 opto couplers
Ever since WINxp arrived on the scene hams who send code via computer
to radios via parallel, serial or usb ports (with serial port converters
following) have seen the latency issue in spades. We're talking about
effective baud rates less that 50. 3-4 milliseoond variable latency
changes
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of ewkeh...@aol.com
Sent: Friday, 26 July 2013 5:32 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] RS 232
I do not understand your question, I am referring to low noise
applications like
Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of ewkeh...@aol.com
Sent: Friday, 26 July 2013 5:32 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] RS 232
I do not understand your question, I am referring to low noise
applications like
On 7/26/13 4:41 AM, briana wrote:
Ever since WINxp arrived on the scene hams who send code via computer
to radios via parallel, serial or usb ports (with serial port converters
following) have seen the latency issue in spades. We're talking about
effective baud rates less that 50. 3-4
I have enclosed a sketch of the usual way of using opto's to make an
RS232 like interface. I haven't spent much time thinking, so I am sure
that I have a few things backwards, but you should get the gist of how
it is done.
It is only RS232 like because it has only a single threshold.
-Chuck
But do you get the speed
In a message dated 7/26/2013 10:41:02 A.M. Eastern Daylight Time,
cfhar...@erols.com writes:
I have enclosed a sketch of the usual way of using opto's to make an
RS232 like interface. I haven't spent much time thinking, so I am sure
that I have a few things
I guess that depends on how much speed you want.
Techniques like this work fine up to 19.2K or so.
Which is what the OP was asking to do, as I recall.
I generally just use a max232 chip and live with
all of its warts.
-Chuck Harris
ewkeh...@aol.com wrote:
But do you get the speed
In a
We use 57.6 K
In a message dated 7/26/2013 11:26:12 A.M. Eastern Daylight Time,
cfhar...@erols.com writes:
I guess that depends on how much speed you want.
Techniques like this work fine up to 19.2K or so.
Which is what the OP was asking to do, as I recall.
I generally just use a max232
Hi
The only other thing I have seen done on opto isolated RS-232 is to add a
protection diode on the transmit opto output transistor. There's a spec that
says you have to be able to apply +/- 25 volts to any pin weather the device is
powered up or not. If you want high(er) speed you can put a
Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of ewkeh...@aol.com
Sent: Friday, 26 July 2013 5:32 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] RS 232
I do not understand your question, I am referring to low noise
applications like
of precise time and frequency measurement
Sent: July 26, 2013 1:37 PM
Subject: Re: [time-nuts] RS 232
Hi
In order to get voltages from the other pins on the D connector:
1) You have to program them to be in the correct state (either high or low)
2) They have to be present on the driver side
The diode would be a good idea... I forgot about that.
57.6K would probably work with the proper selection of resistors,
but you could totem pole the opto's to make them pull up and
down.
-Chuck Harris
Bob Camp wrote:
Hi
The only other thing I have seen done on opto isolated RS-232 is to
There is a difference between managing the latency (as in ensuring that sound
and video are synchronized, but latency itself is acceptable) and minimizing
the latency as in a Morse code keyer where the operator has to manually control
the generation of elements that can be as narrow as 20mS
measurement
Sent: July 26, 2013 1:37 PM
Subject: Re: [time-nuts] RS 232
Hi
In order to get voltages from the other pins on the D connector:
1) You have to program them to be in the correct state (either high
or low)
2) They have to be present on the driver side (usually, but not
always true)
3
: Re: [time-nuts] RS 232
Hi
In order to get voltages from the other pins on the D connector:
1) You have to program them to be in the correct state (either high
or low)
2) They have to be present on the driver side (usually, but not
always true)
3) They need to be 3 V (diode drops etc
On 7/26/13 12:50 PM, Didier Juges wrote:
There is a difference between managing the latency (as in ensuring that sound
and video are synchronized, but latency itself is acceptable) and minimizing
the latency as in a Morse code keyer where the operator has to manually control
the generation of
Hi
There's also the time honored approach of generating the side tone off of the
generated RF. In that case the latency to the transmitter would matter quite a
bit. I have no idea *why* you would run the key through a computer in that case
….
Bob
On Jul 26, 2013, at 4:52 PM, Jim Lux
Actually computers generate probably 98% of the code during so called
radio contests. During a contest weekend it is not at all unusual for
individuals to make thousands of contacts. Computers automate the
drudgery of sending your call thousands of times and most exchanges.
However even
Hi
….. but why route the key *through* the computer if you are generating the side
tone off of RF…
Bob
On Jul 26, 2013, at 6:16 PM, Brian Alsop als...@nc.rr.com wrote:
Actually computers generate probably 98% of the code during so called radio
contests. During a contest weekend it is not
Actually the sidetone is generated in most cases by the transmitter. It
can be fed into either earphones, speaker or the computer depending on
what you're doing.
The manual key can be connected to the computer, WINKEY box or directly
to the transmitter. Connecting it to the computer or
The old MC1489's and 1489A's had both positive and negative
thresholds (about +/- 1.5V.. not quite correct, but better
than nothing), and as such wouldn't work with a 0 to 5V signal.
Then along came the IBM-PC, with its comport card that had both
20ma current loop, and RS232 implemented using
Hi
The advantage of generating the side tone from rectified RF is that you have
quick feedback when you have no RF. The disadvantage is that it's the maximum
latency approach.
Bob
On Jul 26, 2013, at 6:25 PM, Brian Alsop als...@nc.rr.com wrote:
Actually the sidetone is generated in most
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] RS 232
Hi
In order to get voltages from the other pins on the D connector:
1) You have to program them to be in the correct state (either high or low)
2) They have to be present on the driver side (usually
j...@miles.io said:
RS232 works much better for capturing PPS timing.
Unless you are watching it with a ring-0 (kernel) driver, and/or ...
The NTP folks have done a lot of good work in this area.
RFC 2783 from March 2000 covers the API.
http://tools.ietf.org/html/rfc2783
It's implemented in
ma...@non-stop.com.au said:
It you can figure out how to raise DTR while your application has the port
open it can be a good source of power for a RS232 device.
Most OSes turn it on automagically when you open the file. (and turn it off
when you close the file)
--
These are my opinions.
Hi
If the driving program is written using the standard DLL's / libraries it's
directly under control of that program. It's state will depend a lot on what
the coder decided was right.
Bob
On Jul 26, 2013, at 9:07 PM, Hal Murray hmur...@megapathdsl.net wrote:
ma...@non-stop.com.au said:
On Fri, Jul 26, 2013 at 12:50 PM, Didier Juges shali...@gmail.com wrote:
It is trivial to do on a microcontroller running at 1MHz but surprisingly
harder to do on a 2GHz Windows machine.
It is not just a matter of time stamping the key closure, you have to get
the sound system starting and
There are a number of things that can be done to go around Windows latency, but
just like Time-Nuts are not satisfied with a just adequate timing solution,
some hams don't like having an extra box if it can be avoided. When you take
your rig and equipment to a far away destination, the most you
Most CW operators use keyers to generate the dits and dahs precisely. The
keyer can be controlled directly by the computer or be a software Meyer or be
controlled by an iambic key connected to the computer. A few operators still
use straight keys like the J38 or a 'bug' like the Vibroplex. The
Since joining time nuts over four years ago I have not used a single MAX
232 chip. Two reasons MAX do not give me isolation and do generate noise in
critical applications. I prefer the use of two H11 opto couplers which work
perfect. On the receiving end the diode along with a current
Debating the band belive ideal for older is +-3V. But I would need to
check. And how old is old? Not to sure many of the old 1488 1489 devices
are around anymore.
I think more compatibility would be supported by the +-1.4 you mention.
Regards
Paul
WB8TSL
On Thu, Jul 25, 2013 at 9:39 AM,
For short cable and non-critical use, CMOS levels (0-5V) work fine.
RS-232 receiver thresholds are actually similar to TTL levels
(0.8-2.7V), though the spec is for +/-3V minimum drive for noise
immunity. Phantom power can be gotten from the control lines - this is
how serial mice are
A lot of these questions can be side-stepped today because few to no modern
PC's have built in RS-232 serial ports.
And if you are going to add a serial port you can just put in a RS-422 PCI
card or RS-422 to USB interface instead. A big win, and it makes much more
sense to leach +5V off of USB
: Thursday, 25 July 2013 11:39 PM
To: time-nuts@febo.com
Subject: [time-nuts] RS 232
Since joining time nuts over four years ago I have not used a single MAX
232 chip. Two reasons MAX do not give me isolation and do generate noise in
critical applications. I prefer the use of two H11 opto couplers
: Thursday, 25 July 2013 11:39 PM
To: time-nuts@febo.com
Subject: [time-nuts] RS 232
Since joining time nuts over four years ago I have not used a single MAX
232 chip. Two reasons MAX do not give me isolation and do generate noise
in critical applications. I prefer the use of two H11 opto couplers
with the low-noise keyword ;)
-marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of ewkeh...@aol.com
Sent: Thursday, 25 July 2013 11:39 PM
To: time-nuts@febo.com
Subject: [time-nuts] RS 232
Since joining time nuts over four
with the low-noise keyword ;)
-marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of ewkeh...@aol.com
Sent: Thursday, 25 July 2013 11:39 PM
To: time-nuts@febo.com
Subject: [time-nuts] RS 232
Since joining time nuts over four
ewkeh...@aol.com said:
David had the right answer using the power that the RS 232 mouse uses out
of a DB 9, started looking but I do not have one any more and I can not
find any data.
Some PCI cards have a jumper on one of the modem control signals to provide 5
or 12 V. It was used to
] On
Behalf Of ewkeh...@aol.com
Sent: Thursday, 25 July 2013 11:39 PM
To: time-nuts@febo.com
Subject: [time-nuts] RS 232
Since joining time nuts over four years ago I have not used a single
MAX
232 chip. Two reasons MAX do not give me isolation and do generate
noise
in critical
: [time-nuts] RS 232
Since joining time nuts over four years ago I have not used a single
MAX
232 chip. Two reasons MAX do not give me isolation and do generate
noise
in critical applications. I prefer the use of two H11 opto couplers
which
work perfect. On the receiving end
:39 PM
To: time-nuts@febo.com
Subject: [time-nuts] RS 232
Since joining time nuts over four years ago I have not used a single
MAX
232 chip. Two reasons MAX do not give me isolation and do generate
noise
in critical applications. I prefer the use of two H11 opto couplers
which
, 2013 3:34 PM
Subject: Re: [time-nuts] RS 232
Bill
Thank you I am only looking for a solution that is simple in Corby's case
we used a separate power source, but the question is, is it necessary. That
is why I brought it up to the list. Shopping for ideas.
Bert
In a message dated 7/25/2013 4
: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]
On
Behalf Of ewkeh...@aol.com
Sent: Thursday, 25 July 2013 11:39 PM
To:time-nuts@febo.com
Subject: [time-nuts] RS 232
Since joining time nuts over four years ago I have not used a single
MAX
232 chip. Two reasons
To: time-nuts@febo.com
Subject: Re: [time-nuts] RS 232
I do not understand your question, I am referring to low noise
applications
like counters for dual mixers or other AV measurements, but also Shera
and
even Tbolt where external noise should be kept to a minimum. When you
chase 1 E-14
be more
confident with a schematic :)
--marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of ewkeh...@aol.com
Sent: Friday, 26 July 2013 5:32 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] RS 232
I do not understand your
] On
Behalf Of ewkeh...@aol.com
Sent: Friday, 26 July 2013 5:32 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] RS 232
I do not understand your question, I am referring to low noise
applications like counters for dual mixers or other AV measurements, but also
Shera
and even Tbolt
Miles Design LLC
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of ewkeh...@aol.com
Sent: Thursday, July 25, 2013 12:32 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] RS 232
I do not understand your question, I am
j...@miles.io said:
Agreed, nobody should be using RS232 for anything nowadays.
RS232 works much better for capturing PPS timing.
Another advantage of RS232 over USB is that the configuration is stable when
things get unplugged and replugged, or powered off, or ... Of course, that's
a
draw the line and say, enough is enough?!
-marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Hal Murray
Sent: Friday, 26 July 2013 9:17 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] RS 232
j
j...@miles.io said:
Agreed, nobody should be using RS232 for anything nowadays.
RS232 works much better for capturing PPS timing.
Unless you are watching it with a ring-0 (kernel) driver, and/or using a
hard realtime OS to run the client software, it really won't matter that
much. Anyone
On Thu, Jul 25, 2013 at 8:40 PM, John Miles j...@miles.io wrote:
j...@miles.io said:
Agreed, nobody should be using RS232 for anything nowadays.
RS232 works much better for capturing PPS timing.
Unless you are watching it with a ring-0 (kernel) driver, and/or using a
hard realtime OS
From: Chris Albertson
[]
In just normal UNIX (including Mac OS X) and linux you can see the
difference in the log files between USB and RS232. There is three orders
of magnitude difference. It's micro vs. milli seconds.
[]
Chris Albertson
Redondo Beach, California
A thread has been running about using the IOtech rs232 to GPIB converters.
Thought I would share what I have run into all good.
These boxes come in two flavors
simple 1 device controller/peripheral
Full controllers that operate a full 488 bus and can also do the simple
modes.
IOtech made these
-nuts@febo.com
Subject: [time-nuts] RS 232 to GPIB update on IOtech 488 series
A thread has been running about using the IOtech rs232 to GPIB converters.
Thought I would share what I have run into all good.
These boxes come in two flavors
simple 1 device controller/peripheral
Full controllers
Date: Thu, 17 Nov 2011 17:13:59
To: paul swedpaulsw...@gmail.com; Time-nutstime-nuts@febo.com
Reply-To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: [time-nuts] RS 232 to GPIB update on IOtech 488 series
A thread has been running about using
At 05:13 PM 11/17/2011, paul swed wrote...
The eprom and the addition to the ram socket of a DS1216 clock and
memory
battery chip...Further I had NV corruption failing the 488ex. It
actually all seemed to work just fine actually. Just a red error light.
This was fixed by;
Pulling the sram chip
Yes, there is a standard and I have an original copy. It is an EIA standard
for 422A, 423A, 232C, 449. It was published in 1984. Some of the actual
standards within the large document go back to the early 70's. Regards -
Mike
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960
TTL levels generally will work fine. Also, I have used it with a
number of USB to Serial converters, in particular the Keyspan and the
generic Prolific PL-2303 chip-based converters. Belkin was unstable.
David
At 03:48 PM 6/17/2008, you wrote:
From: Hank [EMAIL PROTECTED]
Subject: [time-nuts
Does your TTL serial/USB-adapter feel fine with a RS-232 level input?
(-25V to +25V in the extreme)
--
Björn
On Wed, 2008-06-18 at 10:54 -0400, David McGaw wrote:
TTL levels generally will work fine. Also, I have used it with a
number of USB to Serial converters, in particular the
Does the Trimble Thunderbolt GPS Disciplined Frequency standard really require
the bi-polar RS-232 signals or will the standard T2L levels that most of
the USB to RS-232 converters work ?
Thanks
Hank KZ4HE
___
time-nuts mailing list --
From: Hank [EMAIL PROTECTED]
Subject: [time-nuts] RS-232
Date: Tue, 17 Jun 2008 14:41:38 -0400
Message-ID: [EMAIL PROTECTED]
Does the Trimble Thunderbolt GPS Disciplined Frequency standard really
require the bi-polar RS-232 signals or will the standard T2L levels that
most of the USB to RS
80 matches
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