On 23 May 2010 13:21, Didier Juges did...@cox.net wrote:
Bruce,
Thanks for the additional information.
+/- 14V is quite unusually low in my experience. I typically use Maxim parts
such as the MAX220 series, which is specified at +/-25V for no damage on the
inputs (some parts in that
I found it, it was uploaded as 5078 and I blissfully saved it under that
name, I am fixing it :)
Didier KO4BB
-Original Message-
From: time-nuts-boun...@febo.com
[mailto:time-nuts-boun...@febo.com] On Behalf Of paul swed
Sent: Saturday, May 22, 2010 9:15 PM
To: Discussion of
Bob,
even without a computer connected the beast should do SOMETHING. In
conjunction with a pc and a running communication it is easier to judge WHAT
it currently does.
To establish communication first find out what pinning the RS232 connector
has: with the negative cable (black) of a voltmeter
Bob,
I can't say for sure if the Z3805a will automatically initialize itself
from a power-on with no monitor on the serial port, but I think it
should. I got mine from China over a year ago and I don't recall telling
it to do a survey, but maybe I did. One thing that has been mentioned
here
Hi
As mentioned in the wiki, the standard dates to 1969. The interface dates to
(at least) 1962. I would not be at all surprised to find that it's older than
that. My first exposure was on Bell system modems, which were showing up as
surplus in the late 60's. The EIA standard was very much a
I guess my trying to put RS-232 in the subject line did not catch on. My
original EIA Standard RS-232-C is dated August 1969 and it claims to be a
revision of RS-232-B. It also says it was reaffirmed in 1981. There are I
guess newer versions now, as stated by someone else on here. Regards - Mike
At 08:27 AM 5/23/2010, Bob Camp wrote...
As mentioned in the wiki, the standard dates to 1969. The interface
dates to (at least) 1962.
No, it says RS-232-C dates to 1969. The C revision was at least the 3rd
(probably the 4th, as they likely did not start with RS-232-A). It is
very probable
Hi
The DB-25 connector, with the pinouts detailed in the C rev and the levels in
C all existed in the early 60's / late 50's. It took them until C to get a
spec that was at least close to describing what was already common practice,
the A and B revs both had a lot missing in them.
Bob
On May
Didier et al:
Please accept my most profound apologies!!! Dyslexia strikes again!!
Norm n3ykf
Didier Juges did...@cox.net wrote:
I found it, it was uploaded as 5078 and I blissfully saved it under that
name, I am fixing it :)
Didier KO4BB
-Original Message-
From:
Didier et al:
Please accept my most profound apologies!!! Dyslexia strikes again!!
Norm n3ykf
Didier Juges did...@cox.net wrote:
I found it, it was uploaded as 5078 and I blissfully saved it under that
name, I am fixing it :)
Didier KO4BB
-Original Message-
From:
Ulrich,
On pin 2 of the DB9, I get -0.5V, and on pin 3 (TX) I get +2.0V. Doesn't sound good. I have a 3805 that has only the
bottom DB25 connector. The person who sold it to me made a 3 wire cable, DB25 to DB9, with pins 23 reversed and pin 7
grounded.
Bob
- Original Message -
Hi All,
Does anyone have a manual for this Z3805A? Schematics?
Thanks,
Bob
___
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
The Symmetricom 3805's have an area on the lower board right behind the
control DB-25. It's very similar to the 3801. There are three rows of holes
for 0.025 post connectors. One row pair is labeled RS-232. The other row pair
is labeled RS-422. The original intent appears to be to jumper
Bob
Looking at al these pictures, I'm beginning to think I have a Z3801A, not a 05A. After a few hours, the unit still has
not locked. It is possible the antenna is bad. I have a few more that I know are working. I also took the precaution
of connecting an antenna before powering up, as
Robert Benward wrote:
Bob
Looking at al these pictures, I'm beginning to think I have a Z3801A,
not a 05A. After a few hours, the unit still has not locked. It is
possible the antenna is bad. I have a few more that I know are working.
I also took the precaution of connecting an antenna
In a message dated 23/05/2010 18:51:55 GMT Daylight Time,
rbenw...@verizon.net writes:
Looking at al these pictures, I'm beginning to think I have a Z3801A, not
a 05A. After a few hours, the unit still has
not locked.
--
Bob
It's easy enough to tell If you have a
Hi
One DB-25, one 10 MHz output, one pps output, square 3 pins in a row AMP power
connector = 3801
Two DB-25's, two 10 MHz outs, two pps outs, circular XLR power connector = 3805
Either one can be 24 or 48 volt power. Normally that's pretty well marked.
Either one can also apparently be
OK,
It does flash, then it sequences. I guess that's a start. I suspect it's been a long time since it's been on, this was
the previous owner's spare. As far as location, I bought it at the Dayton Hamfest, so it could be anywhere from New
York or Pennsylvania, to as far as the midwest for
Hi
You might also be able to go to their web site and hit the send me a free
sample button.
If it's a 3801, there's a good chance what you are looking at are RS-422
levels. The previous owner may have simply been confused about what he had as a
backup.
Bob
On May 23, 2010, at 3:02 PM,
Bob,
I have an update! Possibly some good news. After a few hours of nothing, I unplugged the antenna, and the hold over
light came on! So something happened, and according to the manual, it must have locked. Again, the lock light was not
on before the hold over light came on. Looking
Hi
Sounds like a blown LED (or two...).
I'd hit Linear up for a sample of the converter chip.
Bob
On May 23, 2010, at 4:12 PM, Robert Benward wrote:
Bob,
I have an update! Possibly some good news. After a few hours of nothing, I
unplugged the antenna, and the hold over light came on!
All the LEDs light upon POST.
- Original Message -
From: Bob Camp li...@rtty.us
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Sunday, May 23, 2010 4:24 PM
Subject: Re: [time-nuts] Z3805 utility, Was: AW: (no subject)
Hi
Sounds like a blown LED
- Original Message
From: Jeff Hook jeffh...@comcast.net
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Sun, May 23, 2010 12:42:45 PM
Subject: Re: [time-nuts] Z3805 utility, Was: AW: (no subject)
Bob
My 3805 cables look like this
DB9 DB25
2
Bob,
This is your first GPSDO? Do you have anything else to compare your Z380x
10MHz output with? A standalone rubidium or a GPSDO should give you a
stable enough reference to distinguish between a 10811 with or without GPS
support. Other ideas could be to monitor the 1PPS out of the GPS or the
Hi Bob - I have attached text and a photo for the Z3805. But - do you have a
Z3801? It sounds like it.
John Allen K1AE
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Robert Benward
Sent: Sunday, May 23, 2010 1:06 AM
To: Discussion of
Receive data is pin 2 on DB9 and 3 on DB25
Transmit data is Pin 3 on DB9 and 2 on DB25
A straight thru cable with DB9 on one end and DB25 on the other will have
pins 2 and three crossed
A null modem cable, that is required for a Z3805A, will be pin 2 to pin 2
and pin 3 to pin 3
Jeff
-
Jeff,
Generally for a given DTE, there is a swap of 23 when going from DB9 to DB25 and vice-versa. For a normal serial
cable, DTE to DCE, pins 23 are swapped. RS-232 states that pin 2 is the TX data, DCE or DTE, on a DB25. It's TX on
pin 3 for a DB9. Therefore to hook a DCE to a DTE, you
Jeff,
A plain serial cable will have 23 swapped, a straight through is 2-2 and 3-3. There were a lot of DB25 to DB25 that
were NOT serial cables, they were just 25 pin cable using DB9.
Bob
- Original Message -
From: Jeff Hook jeffh...@comcast.net
To: Discussion of precise time and
Bob,
Serial ports have always been tough to get working right.
I guess I shouldn't call a serial cable, a straight cable.
I just want to differentiate it, from a null modem cable.
I made up my own cables when I got my Z3805A's
9pin on computer end and 25 pin on 3805
I wired 2-2, 3-3, and 5-7 and
Hi Jeff,
Understood, having worked with cables of all sorts I always found that word
straight through to be a little tricky.
Bjorn asked if this was my first GPSDO, the answer is yes. As far as comparison standards, I have an E1938, which I
have compared to a HP3586C. That of course (using
Hi Jeff,
Just tried the software, no luck. I think the RS-232 is trashed. I'm off on a business trip this week, when I get
back I'll try and hook up an RS422, or maybe I'll start probing the LT1180 transceiver.
Bob
- Original Message -
From: Jeff Hook jeffh...@comcast.net
To:
- Original Message
From: Robert Benward rbenw...@verizon.net
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Sun, May 23, 2010 4:38:43 PM
Subject: Re: [time-nuts] Z3805 utility, Was: AW: (no subject)
Jeff,
Generally for a given DTE, there is a swap
Jeff,
I just measured one of my plain serial cables, it's 2-2 and 3-3. Now I'm
really confused!!!
TX and RX have the same pin numbers, so a DCE to DTE needs 23 swapped. Does that mean a DCE to DTE needs a null
model, or is that the other way around?
I always feel like an amateur when
Stanley
I still have a serial BOB too!
Its no wonder they moved away from RS-232.Ha-Ha
Jeff
- Original Message -
From: Stanley Reynolds stanley_reyno...@yahoo.com
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Sunday, May 23, 2010 7:41 PM
Stanley Reynolds wrote:
snip
Dec computers / terminal servers were as I described, but many brands
were different. Still have a BOB aka break out box with LEDs to
indicate levels, matching transmit and receive is easy, getting the
hardware flow control / signaling right was a little more
Bob,
Does your plain serial cable have 25pin on one end and 9pin on the other?
If so, it shoud be 2-3 and 3-2 (because of DB9 toDB25 conversion)
If its 2-2 and 3-3 its a null modem cable (this is what you want)
This is not true if its 9 pin to 9 pin or 25 pin to 25 pin cable
standard serial
OK. I think I know where some of this confusion I'm having is coming from.. All these descriptions are misleading in
that they (Wiki) call pin 2 TX. On wiki's page, both DCE and DTE are TX=2. The table below shows the same except that
TX is defined from the DTE's point of view. Thus DTE to
My previous email is my mea culpa
The box is now in holdover mode. I don't what that means, it's been running
for a few hours now.
Bob
- Original Message -
From: Jeff Hook jeffh...@comcast.net
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent:
Hi
Holdover = it can't find any GPS sat's and is running on the OCXO.
Bob
On May 23, 2010, at 9:29 PM, Robert Benward wrote:
My previous email is my mea culpa
The box is now in holdover mode. I don't what that means, it's been running
for a few hours now.
Bob
- Original
Hi
Long ago I decided to go with the terms straight and null modem for the
cables I use. NM and ST are easy to mark and hard to confuse.
Bob
On May 23, 2010, at 8:58 PM, jimlux wrote:
Stanley Reynolds wrote:
snip
Dec computers / terminal servers were as I described, but many brands
Bob,
The best way to get it right is to use a break out box, if both lights
connected to the data pins are on then it is right else swap the pins. If no
BOB then measure pin 2 to ground and pin 3 to ground one should be near zero
the data receive pin and the transmit pin should read a negative
There really is no mystery in any of this. There are two types of
equipment, a Data Terminal Equipment, DTE, and a Data Communications
Equipment, DCE. A DTE refers to the end controlling terminal as in a
computer, teletype, dum terminal, green screen, et al. It should have
a mail connector on it,
On 24 May 2010 12:48, Robert Benward rbenw...@verizon.net wrote:
Jeff,
I just measured one of my plain serial cables, it's 2-2 and 3-3. Now I'm
really confused!!!
TX and RX have the same pin numbers, so a DCE to DTE needs 23 swapped.
Does that mean a DCE to DTE needs a null model, or is
On 24 May 2010 12:57, Jeff Hook jeffh...@comcast.net wrote:
Stanley
I still have a serial BOB too!
Its no wonder they moved away from RS-232. Ha-Ha
I have a fancy little BOB which can decode and display data on Tx and
Rx lines as it travels though and can be buffered. That thing has
saved
At 09:27 PM 5/23/2010, Robert Benward wrote...
If your device is a DCE, then pin 2 is really a RX input, not a TX
output.
You're looking at it wrong - a modem is a DCE, and pin 2 is Transmitted
Data (TX) input. That is, data input to the modem for transmission to
the remote. TX is an output
Takes foot out of mouth!!!
On 24 May 2010 14:08, Steve Rooke sar10...@gmail.com wrote:
There really is no mystery in any of this. There are two types of
equipment, a Data Terminal Equipment, DTE, and a Data Communications
Equipment, DCE. A DTE refers to the end controlling terminal as in a
My experience with the term straight through is that I've seen RS-232 cable that have the ground pin connected to the
shell. In a straight through the pins are one to one and the only thing connected to the shell would be the shield if
one is available.
Bob
- Original Message -
It's no mystery if you know the naming convention. As you said, if you look at the modem as line driver of sorts,
then yes, the line marked TX would an input to the driver...I think the problem is there are so many sources for the
info, and each presents it a little differently, adding to the
On 24 May 2010 15:22, Robert Benward rbenw...@verizon.net wrote:
My experience with the term straight through is that I've seen RS-232
cable that have the ground pin connected to the shell. In a straight
through the pins are one to one and the only thing connected to the shell
would be the
49 matches
Mail list logo
