Re: [time-nuts] TS2100 OCXO Conversion: Command exploration

[Philip Jackson]

Bruce

Thanks for posting your research.

Re. the Lock question.

It's been a while since I last played with a TS2100 given the roll over issue, 
but IIRC the "lock" LED is an indication that you
have more than a specified number of satellites (four sounds familiar) with a 
signal reading above a certain threshold.  I don't
think it means oscillator discipline lock.

So if you haven't changed any of the masks that are used to interpret the data 
coming off the GPS card then I would investigate the
quality of your signal into the receiver.

There's a GPS menu under the TIMING menu that will give you a readout of signal 
strengths.

What antenna are you using and how long and what type of cable is the downlead? 
 Does the antenna have a complete view of the sky?
The default masks assume a low angle of acceptance I believe.

Philip

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bruce Lane
Sent: Saturday, April 07, 2018 2:46 PM
To: TimeNuts
Subject: [time-nuts] TS2100 OCXO Conversion: Command exploration

Fellow Time-Tickers,

I'm still experimenting with conversion of the TS2100 from standard TTL
oscillator to OCXO. More specifically, the OCXO I'm trying is made by
the now-defunct Piezo Crystal Company, Carlyle, PA. It's their model
2900082-47, and from what little I've been able to discover, it seems to
match the large 'U56' pattern in the 2100. It is said to be a direct
replacement for the Trimble-branded 37266, so I'm hoping its EFC voltage
is in the 0-5V range.

I've made much progress in deciphering the menu structure of the 'root
eng' section, thanks to past posts from Greg Dowd and others. Permit me
to explain, for the benefit of those who may be having trouble making
the 'intuitive leap,' as it were. Please note, everything I'm describing
here is done with a hardware RS232 connection directly to the unit, on
P4 - Serial port B. Comm parameters used were 9600-8-N-1, no flow control.

Symmetricom, apparently, used single words as commands. Anything
following the first word in a command list, unless clearly called out by
an underscore (as in the command 'eeprom_select') is merely descriptive
commentary for the command itself.

Here's some examples. We'll start with the command 'root' (minus the
quotes, of course). If you type 'root' and simply hit enter, nothing
appears to happen. However, if you type 'root ?' and hit enter, you get
this:

Commands

network /
timing /
serial /
utility /
intrinsic help


This is indeed the visible 'root' level of the command directory. Note
the valuable (to techies) 'root eng' is hidden. Type that command, add a
question mark at the end, hit enter, and you get this:


Commands

start net interface
timing tools /
serial tools /
eeprom tools /
spi tools /
flash tools /
display tools /
memory tools /
intrinsic help


Type 'root eng eeprom ?' and hit enter, and you get:


Commands

ethernet address
board serial number
gain default
filter constant
low filter constant
precision
set eeprom
get eeprom
read serial eeprom
write serial eeprom
tx 16 bits to eeprom
location for image
info value
eeprom_select
intrinsic help


Do you see the pattern? The first word, and only the first word, is the
command and whatever you type after that is what value you want entered
as part of the command. The question mark shows a list of commands
available under whatever section you're in.

Example: Type 'root eng eeprom gain' and the far left column will show
you what the current gain setting is. Type something like 'root eng
eeprom gain -20' and your gain will be set to -20 and the value stored
in the EEPROM.

Now, here's the fun part. Remember how I'd originally asked about
changing the D/A value, and I couldn't seem to get the syntax right? As
I recall, other list members have had similar issues.

Check this out: Type 'root timing utils ?' and hit enter. You get:


Commands

tfp data
jam sync
force jam
phase on
adjust time
generator offset
gain adjust
filter constant
low filter constant
diff value
d/a load
leap second utc
reference time
cmp delay
intrinsic help


Now, try this one: 'root timing utils d/a' and hit enter. Here's what I
gor:

D/A value (0x - 0x) now:0x178

Next, I tried: 'root timing utils d/a 0x180' and hit enter. Lo and
behold, when I queried the value again, I got:

D/A value (0x - 0x) now:0x180

So -- That's how to set the D/A constant in the beastie!

Now, with all this said: I'm still waiting for a 'Lock' indicator on
the front. It's tracking, and the D/A 

Re: [time-nuts] TymServe TS2100 dead power supply

[Philip Jackson]

This might be of interest.  I don't know any more about it than is stated at
the site below:
 
https://www.greenlake-eng.com/it/products/time-products/gle-tcsw/
 
Philip

-- Forwarded message --
From: Bob Martin 
Date: Wed, Mar 7, 2018 at 2:34 PM
Subject: Re: [time-nuts] TymServe TS2100 dead power supply
To: time-nuts@febo.com


RANDOM QUESTION -- does anybody know of software to *generate* IRIG time
code? Something in C that's adaptable to a modern micro would be good. In
something like a Raspberry Pi 3, IRIG generation would make a nice addition
to Lady Heather...

cheers and 73,

Bob K6RTM

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Re: [time-nuts] S200 to S250 Conversion to in/outs

[Philip Jackson]

Have you tested this approach?

The firmware will need to recognize the new hardware configuration to enable
the 250's additional sync input options and I'm not sure how just adding
jacks would be something that could be sensed reliably by the chipset?

Thanks

Philip

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of
mart...@soundtech-lg.com
Sent: Tuesday, October 03, 2017 4:25 PM
To: time-nuts@febo.com
Subject: [time-nuts] S200 to S250 Conversion to in/outs

Quite easy to accomplish!
Signals 1PPS and 10mHz are sitting untapped at the jack signal traces on
the board.
You could put any 50 ohm BNC jacks there. However here is the correct
dual jack part to install (3 req'd).
Search Digikey for their part# ARF2115-ND
Voila!  Instant S250 !!! all the gozintas, and gozoutas.

Hope this has not already been discussed!

Martin
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Re: [time-nuts] RS-232 Pin Outs for the Acron Zeit WWVB LCD Clock

[Philip Jackson]

I'm wondering if something like this $10 item

http://www.nulsom.com/datasheet/NS-RS232_en.pdf

Would perform the same function as the components in the factory cable once 
I've figured the pinout at the clock end, which shouldn't be too hard unless 
someone has done that already.  Or would I need to find an similar device which 
inverts the incoming logic first?
TTL to RS-232 adapters seem fairly common and probably cheap for them just to 
source off the shelf from an OEM supplier.   
I don't know if I've seen an inverting one and that would seem a more costly 
approach than handling 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) ... 
the connection would have to be a minimal 3-wire serial (RS-232 or 
TTL/UART)https://en.m.wikipedia.org/wiki/RS-232#3-wire_and_5-wire_RS-232
Ground is easy to find, and TxD and RxD is a coin-toss (50:50) if you hook-up 
right.
greg, w9gb
===
I thought I could answer this question (Acron Zeit) 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
==Fri, Jul 21, 2017 at 4:27 PM, Philip Jackson <> wrote:
Does anyone have the serial pinout info for the Acron Zeit clock?
---
Sent from iPad Air
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[time-nuts] RS-232 Pin Outs for the Acron Zeit WWVB LCD Clock

[Philip Jackson]

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.

Philip
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Re: [time-nuts] Conversion of Stanford PRS10 to RS-232 Communication

[Philip Jackson]

Many thanks for the steer.  I was getting hung up on the reference to
jumpers.  I'll order the 240R and 3K9 SMD resistors (per the Rev H parts
list) and see how it goes.
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[time-nuts] Conversion of Stanford PRS10 to RS-232 Communication

[Philip Jackson]

I understand that the PRS10 Rubidium units either talk to the host
device via a RS-232 serial command language or via analog values using
the same set of pins in both cases.

The manual says that internal jumpers can be used to switch between
communication modes.

I have a PRS10 that is set for analog working and would like to switch
it over to RS-232 mode.

A cursory peek inside the case with no disassembly doesn't reveal any
simple jumpers/headers that might be used to flip formats.

Does anyone know how the format can be changed?

The manual doesn't say anything more than there are jumpers inside that
can be changed.

Many thanks

Philip
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