Re: [time-nuts] Noise and non-linear behaviour of ferrite transformers
On 24.07.2014 18:00, Ackermann, John R wrote: Just FWIW, the TADD-1 uses transformers to provide DC isolation, but the shield side of the coax goes to ground through a 0.1uF cap. The hope is that this reduces the issue that John's referring to (and which I've seen plenty of times using baluns). For optimum results with respect to high RF frequencies, I'd expect that you would need this cap to be annular, so that the cable can pass through the middle, and the outside connects to the chassis hole all around. This is like a feedthrough capacitor, except that the wire that goes through the center actually is a coaxial cable. While feedthrough caps for single wires are common, I haven't seen any for coaxial cables (rigid or semi-rigid cables come to mind). Do they really not exist, and if so why? Or have I failed to look in the right places? Cheers Stefan ___ 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.
Re: [time-nuts] GPS III
Hi The antenna is a pretty standard ceramic patch. No better (or worse) than any other patch. No idea how quiet the preamp is or even if there is one. The uBlox receiver is very good for sensitivity. Bob On Jul 24, 2014, at 9:44 PM, Chris Albertson albertson.ch...@gmail.com wrote: How good is the built-in antenna? Do they work well in doors away from windows? The $15 price, low power and 2.5 meter CEP are attractive. They are 1/2 the price of something else I was looking at. I'd be using them for navigation, not timing. On Thu, Jul 24, 2014 at 5:57 PM, Bob Camp kb...@n1k.org wrote: Hi If you go looking for them on the auction sites, the RYN25DI from Reyax is the search item for the RS-232 version. The RYN25AI is the search item for the not RS-232 version. Bob On Jul 24, 2014, at 7:15 PM, Mark Sims hol...@hotmail.com wrote: I have purchased about a dozen of these receivers (mostly the RS-232 version for $1 more). Reyax ships very fast. I get them in about 1 week. They work well, and are based upon the Ublox MAX-7C. They output independent GPS and Glonass NMEA messages and don't appear to merge the two systems in their navigation solutions. I have not done any testing of the 1PPS signal (which is brought out to the connector). -- On eBay the RNY25A1 receiver module sells for $15 ___ 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. ___ 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. -- Chris Albertson Redondo Beach, California ___ 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. ___ 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.
Re: [time-nuts] Noise and non-linear behaviour of ferrite transformers
General Radio used to have some common values of capacitances available in terminator type configuration and passthru/bulkhead type configuration. These were moderately useful doing some bridge-type measurements. I remember blowing one up once, and taking it apart being pretty impressed the capacitor was a concentric design. I haven't seen examples of these newer than the type 874 hermaphoditic connectors. I swear a couple decades ago I saw BNC terminator-type capacitors in the Pasternack catalogs that filled my mailboxes, but I never saw any of these in the flesh. I do know that DC blocking capacitor series-capacitor BNC's are widely available from Pasternack and others. Tim N3QE Tim N3QE On Fri, Jul 25, 2014 at 7:31 AM, Stefan Heinzmann stefan_heinzm...@gmx.de wrote: On 24.07.2014 18:00, Ackermann, John R wrote: Just FWIW, the TADD-1 uses transformers to provide DC isolation, but the shield side of the coax goes to ground through a 0.1uF cap. The hope is that this reduces the issue that John's referring to (and which I've seen plenty of times using baluns). For optimum results with respect to high RF frequencies, I'd expect that you would need this cap to be annular, so that the cable can pass through the middle, and the outside connects to the chassis hole all around. This is like a feedthrough capacitor, except that the wire that goes through the center actually is a coaxial cable. While feedthrough caps for single wires are common, I haven't seen any for coaxial cables (rigid or semi-rigid cables come to mind). Do they really not exist, and if so why? Or have I failed to look in the right places? Cheers Stefan ___ 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. ___ 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.
Re: [time-nuts] GPS III
I have purchased about a dozen of these receivers (mostly the RS-232 version for $1 more). Reyax ships very fast. I get them in about 1 week. They work well, and are based upon the Ublox MAX-7C. They output independent GPS and Glonass NMEA messages and don't appear to merge the two systems in their navigation solutions. I have not done any testing of the 1PPS signal (which is brought out to the connector). I bought a couple too. After trying to figure out how to enable both I did some reading and discovered that only one can be enabled at a time. It's not until their 8-series that both can be enabled simultaneously. Kind of a let down, but still cool to dabble with GLONASS. ___ 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.
Re: [time-nuts] Datum ts2100 gps error code 41: New clone ace III
The GPS Health menu choice never really did anything. It will always say Doing position fixes, error code: 1. However, the GPS Firmware and Signal Strength menus should report back proper information. Can you elaborate on it does not set the right time? Is it some random time, or is it off by some fixed general offset (like 1 hour)? Do the Tracking Lock LEDs light up with the new receiver? Hi all! Have a Datum ts2100 that had a failed gps receiver. Found a replacement as a new clone. The ts2100 with the new receiver does not set the right time, however, it does know where it is, reports the gps firmware version and gives satellite information. Prior to this, the only message that I could get regarding the gps receiver was gps engine busy. The ts2100 never illuminates the lock or tracking led's on the front panel. When checking the menu available from the front panel, in the timing section, at the gps health prompt, the ts2100 reports the error gps doing fixes error code 41 A google search reveals absolutely nothing. Norm n3ykf ___ 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.
Re: [time-nuts] Datum ts2100 gps error code 41: New clone ace III
Jason, The time on the front panel of the instrument, at power on, shows Jan 1, 2014. As you say, the gps health menu choice functions sometimes like you state, other times I get error 41. I do also get the firmware and satellite information. Neither the Tracking or Lock led's illuminate. Norm On Fri, Jul 25, 2014 at 11:06 AM, Jason Rabel ja...@extremeoverclocking.com wrote: The GPS Health menu choice never really did anything. It will always say Doing position fixes, error code: 1. However, the GPS Firmware and Signal Strength menus should report back proper information. Can you elaborate on it does not set the right time? Is it some random time, or is it off by some fixed general offset (like 1 hour)? Do the Tracking Lock LEDs light up with the new receiver? Hi all! Have a Datum ts2100 that had a failed gps receiver. Found a replacement as a new clone. The ts2100 with the new receiver does not set the right time, however, it does know where it is, reports the gps firmware version and gives satellite information. Prior to this, the only message that I could get regarding the gps receiver was gps engine busy. The ts2100 never illuminates the lock or tracking led's on the front panel. When checking the menu available from the front panel, in the timing section, at the gps health prompt, the ts2100 reports the error gps doing fixes error code 41 A google search reveals absolutely nothing. Norm n3ykf ___ 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. ___ 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.
Re: [time-nuts] Noise and non-linear behaviour of ferrite transformers
Stefan wrote: shield side of the coax goes to ground through a 0.1uF cap. For optimum results with respect to high RF frequencies, I'd expect that you would need this cap to be annular, so that the cable can pass through the middle, and the outside connects to the chassis hole all around. The coax itself remains coaxial through the connector -- it is just the point on the shield that is bypassed to chassis that is not annular. The low impedance of the shield makes this non-critical up to frequencies where you should be using a waveguide anyway. It is a well-known and proven technique for bypassing shields to chassis with no galvanic connection. (In some cases, the capacitor is paralleled with a resistor of 10 ohms to 1k ohms -- this provides some DC/LF continuity while limiting the possible ground loop current to levels that [hopefully] don't cause noise problems.) Rarely is the cap as large as 0.1uF -- 0.01uF is most common, and 1nF is also quite common. You want the cap to have low inductance (high first self-resonant frequency), and you need to keep the leads very short. Best regards, Charles ___ 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.
Re: [time-nuts] Noise and non-linear behaviour of ferrite transformers
On 25.07.2014 20:07, Charles Steinmetz wrote: Stefan wrote: shield side of the coax goes to ground through a 0.1uF cap. For optimum results with respect to high RF frequencies, I'd expect that you would need this cap to be annular, so that the cable can pass through the middle, and the outside connects to the chassis hole all around. The coax itself remains coaxial through the connector -- it is just the point on the shield that is bypassed to chassis that is not annular. The low impedance of the shield makes this non-critical up to frequencies where you should be using a waveguide anyway. It is a well-known and proven technique for bypassing shields to chassis with no galvanic connection. (In some cases, the capacitor is paralleled with a resistor of 10 ohms to 1k ohms -- this provides some DC/LF continuity while limiting the possible ground loop current to levels that [hopefully] don't cause noise problems.) Rarely is the cap as large as 0.1uF -- 0.01uF is most common, and 1nF is also quite common. You want the cap to have low inductance (high first self-resonant frequency), and you need to keep the leads very short. Well, yes, I've seen this done many times. However, when making shield terminations, many would tell you that it is important to terminate the shield 360 degrees to the chassis in order to have the best effect. Surely, that also has to be true for RF frequencies when you choose to raise the near-DC impedance of the shield-to-chassis connection to combat a hum loop? I'm just trying to take this to the logical conclusion, which would be an annular capacitor for the shield connection. Cheers Stefan ___ 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.
Re: [time-nuts] Noise and non-linear behaviour of ferrite transformers
On 25.07.2014 15:56, Tim Shoppa wrote: General Radio used to have some common values of capacitances available in terminator type configuration and passthru/bulkhead type configuration. These were moderately useful doing some bridge-type measurements. I remember blowing one up once, and taking it apart being pretty impressed the capacitor was a concentric design. I haven't seen examples of these newer than the type 874 hermaphoditic connectors. You probably mean capacitors between center conductor and shield? I swear a couple decades ago I saw BNC terminator-type capacitors in the Pasternack catalogs that filled my mailboxes, but I never saw any of these in the flesh. I do know that DC blocking capacitor series-capacitor BNC's are widely available from Pasternack and others. Yes, I've seen those, too. They actually come in 3 variants: DC-blocking on the center conductor, on the outer conductor, or both. None of these is what I mean, though. I meant DC-blocking between outer conductor and chassis, on a passthru connector that blocks DC on neither the center conductor nor the outer conductor. I've no idea why this is not a common item, just as feedthru capacitors for single wires are. Cheers Stefan ___ 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.
Re: [time-nuts] Datum ts2100 gps error code 41: New clone ace III
Are you sure your GPS module has the correct settings of 9600 8-O-1 TSIP IN TSIP OUT? ___ 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.
Re: [time-nuts] Synergy-GPS SSR-6tru Problem Resolved
Bob, Once in a while a mea culpa is required and we're posting it here so everyone understands our commitment to the users of Synergy's products. The Original Synergy Adaptor Board was designed to allow Motorola's newer 3 volt 12 channel M12+ to plug into an older 5 volt 8 channel UT+ slot. That product worked for hundreds of users over the years until (we found out through your personal aggravation and agony) the recent introduction of Synergy's SSR series of u-Blox based precision timing boards. To make sure that the Synergy UT+ Adaptor Board issue is put to bed properly we asked for an external, formal technical review of this product that was introduced fourteen years ago. The reviewing engineer's first comments were Ouch! This will not work. And, no, the SSR boards do not work the same as the M12 boards on the Synergy Adaptor Board. The M12+ and M12M receivers have separate serial ports for the two functions (Receiver command RxD and DGPS RxD input) so it does not matter what you do with the RTCM port, pin 5 on UT+ connector and pin 8 on the M12+/M12M connector, if not in use with an M12x receiver. The SSR boards, however, had to combine the two serial data streams expected by the M12x navigation receivers into one because the u-Blox receiver modules only use one serial input port for both receiver commands and DGPS correction data. The Synergy Adaptor Boards use a simple gate combiner circuit that worked well when using the M12+ or M12M but left Synergy open to this problem when using an SSR. Both serial lines on the SSR board, pins 2 (Receiver RxD) and 8 (DGPS RxD) are pulled high on the SSR board so open pins are OK but they must not be grounded. The solution is for Synergy to make a UT+ Adaptor Board part number available to users who only want to test the features of SSR timing receivers. That new SSR only Adaptor Board part number, which we'll have available in a few days, will remove R3 (4.7K) and R4 (6.8K) from the adapter board and the compatibility issue will be resolved. In the interim, other users can pull pin 5 of the UT+ connector high (+5V) as you did. We apologize for the confusion and frustration, Bob, and thank you for the valuable feedback! Art Sepin -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Stewart Sent: Thursday, July 24, 2014 11:27 AM To: Tom Van Baak; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Synergy-GPS SSR-6tru Problem Resolved Hi Tom, I think that an offline conversation with Dusty Morris may have pointed out the root cause. The SSR-6tru board uses 3V logic, but the Motorola Oncore boards use 5V. So the Synergy M12 adapter has to do the level shifting to protect the receiver. It does this for input signals by using a voltage divider composed of a 4.7K resistor on top (for the 5V input) and a 6.8K resistor on the bottom to ground. The center tap of these two resistors goes to the receiver. Normally we would expect an open TTL pin to be a logic high. But, in this case, an open pin to the 4.7K resistor on top leaves the 6.8K resistor to act as a pull-down on the receiver's input pin. At least that's my speculation. I'm no EE. Bob From: Tom Van Baak t...@leapsecond.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, July 24, 2014 12:02 AM Subject: Re: [time-nuts] Synergy-GPS SSR-6tru Problem Resolved Hi Bob, That's very good news. Thanks for following through on this issue. Newcomers to the list should know that unlike many of the large corporations in the TF business, Synergy has been hobbyist and time-nuts friendly since the beginning. I know a couple of us bought our first GPS receivers from Synergy in the mid-1990's. This was in the early days of GPS where we used Tom Clark's TAC h/w and SHOWTIME.EXE s/w, in the same way we use Trimble's Thunderbolt h/w and Mark/John's HEATHER.EXE s/w today. /tvb - Original Message - From: Bob Stewart b...@evoria.net To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Wednesday, July 23, 2014 3:19 PM Subject: Re: [time-nuts] Synergy-GPS SSR-6tru Problem Resolved As a reminder, I received an SSR-6tru receiver from Synergy, along with their M12 adapter, which allows you to plug it into a slot for an Oncore GT+, UT+, or VP. I was unable to get the receiver to respond to any commands from the u-blox u-center software. After a lot of troubleshooting, I discovered that pin-5, the DGPS IN pin, must be brought to a logic level high in order for this assembly to work. If it's low, apparently anything going into the board on the Rx line is simply sent back out on the Tx line and not passed to the receiver. I've never owned a GT+ or a VP, so I wasn't aware that a logic high was needed on this pin. The UT+ works just
Re: [time-nuts] Synergy-GPS SSR-6tru Problem Resolved
And while this subject is still up, I want to let the group know that Synergy *really* went out of their way to help me with this. I was a bit surprised at their level of commitment to some ham radio operator who had bought a single unit from them and probably didn't know what the heck he was talking about. A real class act all around! Bob - AE6RV From: Art Sepin a...@synergy-gps.com To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency measurement time-nuts@febo.com Cc: Tom Van Baak t...@leapsecond.com; Dusty Morris doxielove...@cox.net Sent: Friday, July 25, 2014 5:17 PM Subject: RE: [time-nuts] Synergy-GPS SSR-6tru Problem Resolved Bob, Once in a while a mea culpa is required and we're posting it here so everyone understands our commitment to the users of Synergy's products. The Original Synergy Adaptor Board was designed to allow Motorola's newer 3 volt 12 channel M12+ to plug into an older 5 volt 8 channel UT+ slot. That product worked for hundreds of users over the years until (we found out through your personal aggravation and agony) the recent introduction of Synergy's SSR series of u-Blox based precision timing boards. To make sure that the Synergy UT+ Adaptor Board issue is put to bed properly we asked for an external, formal technical review of this product that was introduced fourteen years ago. The reviewing engineer's first comments were Ouch! This will not work. And, no, the SSR boards do not work the same as the M12 boards on the Synergy Adaptor Board. The M12+ and M12M receivers have separate serial ports for the two functions (Receiver command RxD and DGPS RxD input) so it does not matter what you do with the RTCM port, pin 5 on UT+ connector and pin 8 on the M12+/M12M connector, if not in use with an M12x receiver. The SSR boards, however, had to combine the two serial data streams expected by the M12x navigation receivers into one because the u-Blox receiver modules only use one serial input port for both receiver commands and DGPS correction data. The Synergy Adaptor Boards use a simple gate combiner circuit that worked well when using the M12+ or M12M but left Synergy open to this problem when using an SSR. Both serial lines on the SSR board, pins 2 (Receiver RxD) and 8 (DGPS RxD) are pulled high on the SSR board so open pins are OK but they must not be grounded. The solution is for Synergy to make a UT+ Adaptor Board part number available to users who only want to test the features of SSR timing receivers. That new SSR only Adaptor Board part number, which we'll have available in a few days, will remove R3 (4.7K) and R4 (6.8K) from the adapter board and the compatibility issue will be resolved. In the interim, other users can pull pin 5 of the UT+ connector high (+5V) as you did. We apologize for the confusion and frustration, Bob, and thank you for the valuable feedback! Art Sepin ___ 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.
Re: [time-nuts] Noise and non-linear behaviour of ferrite transformers
Stefan wrote: However, when making shield terminations, many would tell you that it is important to terminate the shield 360 degrees to the chassis in order to have the best effect. Surely, that also has to be true for RF frequencies when you choose to raise the near-DC impedance of the shield-to-chassis connection to combat a hum loop? I'm just trying to take this to the logical conclusion, which would be an annular capacitor for the shield connection. Be careful, taking things to their logical conclusion often sets up a reductio ad absurdum. In theory, annular bypassing may be better. In practice, it doesn't seem to make any difference. Which probably explains why nobody makes annular shield-bypass capacitors. Note that there are two phenomena here. We have been talking about the *conducted RF* case where RF current on the shield (in particular, RF current from the signal being carried inside the coax that appears on the outside of the shield due to imbalance) needs to be bypassed to chassis. In this case, bypassing (or directly connecting) one point on the shield to the chassis works fine. The other case is preventing *radiated* RF unrelated to the signal being carried by the coax from entering the chassis. If there is a gap between the shield and the chassis, radiated RF will be admitted according to well-known rules. Annular shield bypassing can help this case, but again -- that is not what we've been talking about. In any case, the tiny gaps produced by shield-isolated connectors will not admit much RF energy at any sane frequency and field strength. Best regards, Charles ___ 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.
Re: [time-nuts] Synergy-GPS SSR-6tru Problem Resolved
Synergy's owner Ulrich Rohde N1UL --DJ2LR/DL1R is a long time ham radio operator, and he will go pretty far to help for an other ham, 73 KJ6UHN ex DL... Alex On 7/25/2014 5:27 PM, Bob Stewart wrote: And while this subject is still up, I want to let the group know that Synergy *really* went out of their way to help me with this. I was a bit surprised at their level of commitment to some ham radio operator who had bought a single unit from them and probably didn't know what the heck he was talking about. A real class act all around! Bob - AE6RV From: Art Sepin a...@synergy-gps.com To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency measurement time-nuts@febo.com Cc: Tom Van Baak t...@leapsecond.com; Dusty Morris doxielove...@cox.net Sent: Friday, July 25, 2014 5:17 PM Subject: RE: [time-nuts] Synergy-GPS SSR-6tru Problem Resolved Bob, Once in a while a mea culpa is required and we're posting it here so everyone understands our commitment to the users of Synergy's products. The Original Synergy Adaptor Board was designed to allow Motorola's newer 3 volt 12 channel M12+ to plug into an older 5 volt 8 channel UT+ slot. That product worked for hundreds of users over the years until (we found out through your personal aggravation and agony) the recent introduction of Synergy's SSR series of u-Blox based precision timing boards. To make sure that the Synergy UT+ Adaptor Board issue is put to bed properly we asked for an external, formal technical review of this product that was introduced fourteen years ago. The reviewing engineer's first comments were Ouch! This will not work. And, no, the SSR boards do not work the same as the M12 boards on the Synergy Adaptor Board. The M12+ and M12M receivers have separate serial ports for the two functions (Receiver command RxD and DGPS RxD input) so it does not matter what you do with the RTCM port, pin 5 on UT+ connector and pin 8 on the M12+/M12M connector, if not in use with an M12x receiver. The SSR boards, however, had to combine the two serial data streams expected by the M12x navigation receivers into one because the u-Blox receiver modules only use one serial input port for both receiver commands and DGPS correction data. The Synergy Adaptor Boards use a simple gate combiner circuit that worked well when using the M12+ or M12M but left Synergy open to this problem when using an SSR. Both serial lines on the SSR board, pins 2 (Receiver RxD) and 8 (DGPS RxD) are pulled high on the SSR board so open pins are OK but they must not be grounded. The solution is for Synergy to make a UT+ Adaptor Board part number available to users who only want to test the features of SSR timing receivers. That new SSR only Adaptor Board part number, which we'll have available in a few days, will remove R3 (4.7K) and R4 (6.8K) from the adapter board and the compatibility issue will be resolved. In the interim, other users can pull pin 5 of the UT+ connector high (+5V) as you did. We apologize for the confusion and frustration, Bob, and thank you for the valuable feedback! Art Sepin ___ 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. ___ 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.
Re: [time-nuts] Synergy-GPS SSR-6tru Problem Resolved
Wow there is a tidbit I did not know Ulrich owns Synergy. I knew he was part of Rohde Schwartz and I firmly believe that I actually spoke with him on 2 meters when I lived in CT on the way to work one day. A 2 meter opening. OK the total beg right now. Schematics for the FLL board (Not a typo) of the SMIQ rf generator. OK that was very on time-nuts. I apologize to the group. However it is impressive that they did give you the support. Much as others had in the past. Regards Paul WB8TSL/1 On Fri, Jul 25, 2014 at 8:51 PM, Alexander Pummer alex...@ieee.org wrote: Synergy's owner Ulrich Rohde N1UL --DJ2LR/DL1R is a long time ham radio operator, and he will go pretty far to help for an other ham, 73 KJ6UHN ex DL... Alex On 7/25/2014 5:27 PM, Bob Stewart wrote: And while this subject is still up, I want to let the group know that Synergy *really* went out of their way to help me with this. I was a bit surprised at their level of commitment to some ham radio operator who had bought a single unit from them and probably didn't know what the heck he was talking about. A real class act all around! Bob - AE6RV From: Art Sepin a...@synergy-gps.com To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency measurement time-nuts@febo.com Cc: Tom Van Baak t...@leapsecond.com; Dusty Morris doxielove...@cox.net Sent: Friday, July 25, 2014 5:17 PM Subject: RE: [time-nuts] Synergy-GPS SSR-6tru Problem Resolved Bob, Once in a while a mea culpa is required and we're posting it here so everyone understands our commitment to the users of Synergy's products. The Original Synergy Adaptor Board was designed to allow Motorola's newer 3 volt 12 channel M12+ to plug into an older 5 volt 8 channel UT+ slot. That product worked for hundreds of users over the years until (we found out through your personal aggravation and agony) the recent introduction of Synergy's SSR series of u-Blox based precision timing boards. To make sure that the Synergy UT+ Adaptor Board issue is put to bed properly we asked for an external, formal technical review of this product that was introduced fourteen years ago. The reviewing engineer's first comments were Ouch! This will not work. And, no, the SSR boards do not work the same as the M12 boards on the Synergy Adaptor Board. The M12+ and M12M receivers have separate serial ports for the two functions (Receiver command RxD and DGPS RxD input) so it does not matter what you do with the RTCM port, pin 5 on UT+ connector and pin 8 on the M12+/M12M connector, if not in use with an M12x receiver. The SSR boards, however, had to combine the two serial data streams expected by the M12x navigation receivers into one because the u-Blox receiver modules only use one serial input port for both receiver commands and DGPS correction data. The Synergy Adaptor Boards use a simple gate combiner circuit that worked well when using the M12+ or M12M but left Synergy open to this problem when using an SSR. Both serial lines on the SSR board, pins 2 (Receiver RxD) and 8 (DGPS RxD) are pulled high on the SSR board so open pins are OK but they must not be grounded. The solution is for Synergy to make a UT+ Adaptor Board part number available to users who only want to test the features of SSR timing receivers. That new SSR only Adaptor Board part number, which we'll have available in a few days, will remove R3 (4.7K) and R4 (6.8K) from the adapter board and the compatibility issue will be resolved. In the interim, other users can pull pin 5 of the UT+ connector high (+5V) as you did. We apologize for the confusion and frustration, Bob, and thank you for the valuable feedback! Art Sepin ___ 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. ___ 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. ___ 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.
Re: [time-nuts] Synergy-GPS SSR-6tru Problem Resolved
Ulrich's Father, professor Lothar Rohde was my boss, Ulrich owns a part of the company , but never worked for it directly also He is President of Communications Consulting Corpor ation; Chairman of Synergy Microwave Corp., Paterson, New Jersey; and a partner of Rohde Schwarz, Munich, Germany. Previously, he was the President of Compact Software, Inc., On 7/25/2014 6:50 PM, paul swed wrote: Wow there is a tidbit I did not know Ulrich owns Synergy. I knew he was part of Rohde Schwartz and I firmly believe that I actually spoke with him on 2 meters when I lived in CT on the way to work one day. A 2 meter opening. OK the total beg right now. Schematics for the FLL board (Not a typo) of the SMIQ rf generator. OK that was very on time-nuts. I apologize to the group. However it is impressive that they did give you the support. Much as others had in the past. Regards Paul WB8TSL/1 On Fri, Jul 25, 2014 at 8:51 PM, Alexander Pummer alex...@ieee.org wrote: Synergy's owner Ulrich Rohde N1UL --DJ2LR/DL1R is a long time ham radio operator, and he will go pretty far to help for an other ham, 73 KJ6UHN ex DL... Alex On 7/25/2014 5:27 PM, Bob Stewart wrote: And while this subject is still up, I want to let the group know that Synergy *really* went out of their way to help me with this. I was a bit surprised at their level of commitment to some ham radio operator who had bought a single unit from them and probably didn't know what the heck he was talking about. A real class act all around! Bob - AE6RV From: Art Sepin a...@synergy-gps.com To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency measurement time-nuts@febo.com Cc: Tom Van Baak t...@leapsecond.com; Dusty Morris doxielove...@cox.net Sent: Friday, July 25, 2014 5:17 PM Subject: RE: [time-nuts] Synergy-GPS SSR-6tru Problem Resolved Bob, Once in a while a mea culpa is required and we're posting it here so everyone understands our commitment to the users of Synergy's products. The Original Synergy Adaptor Board was designed to allow Motorola's newer 3 volt 12 channel M12+ to plug into an older 5 volt 8 channel UT+ slot. That product worked for hundreds of users over the years until (we found out through your personal aggravation and agony) the recent introduction of Synergy's SSR series of u-Blox based precision timing boards. To make sure that the Synergy UT+ Adaptor Board issue is put to bed properly we asked for an external, formal technical review of this product that was introduced fourteen years ago. The reviewing engineer's first comments were Ouch! This will not work. And, no, the SSR boards do not work the same as the M12 boards on the Synergy Adaptor Board. The M12+ and M12M receivers have separate serial ports for the two functions (Receiver command RxD and DGPS RxD input) so it does not matter what you do with the RTCM port, pin 5 on UT+ connector and pin 8 on the M12+/M12M connector, if not in use with an M12x receiver. The SSR boards, however, had to combine the two serial data streams expected by the M12x navigation receivers into one because the u-Blox receiver modules only use one serial input port for both receiver commands and DGPS correction data. The Synergy Adaptor Boards use a simple gate combiner circuit that worked well when using the M12+ or M12M but left Synergy open to this problem when using an SSR. Both serial lines on the SSR board, pins 2 (Receiver RxD) and 8 (DGPS RxD) are pulled high on the SSR board so open pins are OK but they must not be grounded. The solution is for Synergy to make a UT+ Adaptor Board part number available to users who only want to test the features of SSR timing receivers. That new SSR only Adaptor Board part number, which we'll have available in a few days, will remove R3 (4.7K) and R4 (6.8K) from the adapter board and the compatibility issue will be resolved. In the interim, other users can pull pin 5 of the UT+ connector high (+5V) as you did. We apologize for the confusion and frustration, Bob, and thank you for the valuable feedback! Art Sepin ___ 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. ___ 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. ___ 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. ___ 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.
Re: [time-nuts] Synergy-GPS SSR-6tru Problem Resolved
I will say that I was very impressed by the email that Art sent; I do not see very many communications that are as honest as that any more. Most people who are not engineers do not understand the diligence that is required to ensure that one's daily mistakes in architecture, design and implementation of anything electronic gets thrown in the trash and not passed on to customers. I the cases where something DOES slip through, it is always incumbent on the vendor to rectify the problem. I have to do this in my work, and it is refreshing to see other examples of this attitude. I will *always* buy from vendors who exhibit this attitude, and never from vendosr who try and cover up an otherwise perfectly excusable engineering error. On 7/25/2014 6:51 PM, Alexander Pummer wrote: Synergy's owner Ulrich Rohde N1UL --DJ2LR/DL1R is a long time ham radio operator, and he will go pretty far to help for an other ham, 73 KJ6UHN ex DL... Alex On 7/25/2014 5:27 PM, Bob Stewart wrote: And while this subject is still up, I want to let the group know that Synergy *really* went out of their way to help me with this. I was a bit surprised at their level of commitment to some ham radio operator who had bought a single unit from them and probably didn't know what the heck he was talking about. A real class act all around! Bob - AE6RV From: Art Sepin a...@synergy-gps.com To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency measurement time-nuts@febo.com Cc: Tom Van Baak t...@leapsecond.com; Dusty Morris doxielove...@cox.net Sent: Friday, July 25, 2014 5:17 PM Subject: RE: [time-nuts] Synergy-GPS SSR-6tru Problem Resolved Bob, Once in a while a mea culpa is required and we're posting it here so everyone understands our commitment to the users of Synergy's products. The Original Synergy Adaptor Board was designed to allow Motorola's newer 3 volt 12 channel M12+ to plug into an older 5 volt 8 channel UT+ slot. That product worked for hundreds of users over the years until (we found out through your personal aggravation and agony) the recent introduction of Synergy's SSR series of u-Blox based precision timing boards. To make sure that the Synergy UT+ Adaptor Board issue is put to bed properly we asked for an external, formal technical review of this product that was introduced fourteen years ago. The reviewing engineer's first comments were Ouch! This will not work. And, no, the SSR boards do not work the same as the M12 boards on the Synergy Adaptor Board. The M12+ and M12M receivers have separate serial ports for the two functions (Receiver command RxD and DGPS RxD input) so it does not matter what you do with the RTCM port, pin 5 on UT+ connector and pin 8 on the M12+/M12M connector, if not in use with an M12x receiver. The SSR boards, however, had to combine the two serial data streams expected by the M12x navigation receivers into one because the u-Blox receiver modules only use one serial input port for both receiver commands and DGPS correction data. The Synergy Adaptor Boards use a simple gate combiner circuit that worked well when using the M12+ or M12M but left Synergy open to this problem when using an SSR. Both serial lines on the SSR board, pins 2 (Receiver RxD) and 8 (DGPS RxD) are pulled high on the SSR board so open pins are OK but they must not be grounded. The solution is for Synergy to make a UT+ Adaptor Board part number available to users who only want to test the features of SSR timing receivers. That new SSR only Adaptor Board part number, which we'll have available in a few days, will remove R3 (4.7K) and R4 (6.8K) from the adapter board and the compatibility issue will be resolved. In the interim, other users can pull pin 5 of the UT+ connector high (+5V) as you did. We apologize for the confusion and frustration, Bob, and thank you for the valuable feedback! Art Sepin ___ 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. ___ 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. ___ 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.
Re: [time-nuts] Datum ts2100 gps error code 41: New clone ace III
Jason, If the device (gps) reports the firmware and satellites correctly (to the ts 2100), I would assume so. No other reasonable explanation exists. Turns out that the original receiver was a svee6. Found the manual for the gps and am comparing the default messages with the ace III. Norm On Fri, Jul 25, 2014 at 5:45 PM, Jason Rabel ja...@extremeoverclocking.com wrote: Are you sure your GPS module has the correct settings of 9600 8-O-1 TSIP IN TSIP OUT? ___ 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. ___ 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.
Re: [time-nuts] Symmetricom 1111C OCXO question
Hi All, Can anyone advise the supply voltage and range of the control voltage for these gadgets? Cheers, david On 03.04.2014 18:25, Azelio Boriani wrote: Other idea than leaving the 6K8 resistor? Yes... I would prefer to know why the little thing has stopped working. The 6k8 resistor has also probed to be a marginal solution. The operational amplifier is a Burr-Brown one (don't have the p/n at hand now), and since it was my first suspect, I replaced it with a similar (but not the same) part from Linear Technology that I had at hand. With this one, I tested the resistor trick. After concluding that the original opamp was ok, I have put it back. With the original one, the resistor trick did no longer work, so it was not only a dirty solution, but also very marginal. So... I would prefer to find and solve the real failure :) Regards, Javier ___ 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.
