Re: [time-nuts] manual request: Austron 2201A
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Hi, Many of the Odetics SatSync receivers also used this scheme. I've had a few of the receivers but never seen an antenna. Some were modified with a Magellan OEM 5000 module and use a standard (12V) antenna. Robert. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Magnus Danielson Sent: 20 July 2007 00:12 To: time-nuts@febo.com; [EMAIL PROTECTED] Subject: Re: [time-nuts] manual request: Austron 2201A ); SAEximRunCond expanded to false Errors-To: time-nuts-bounces+robert.atkinson=genetix.com+robert.atkinson=genetix.co [EMAIL PROTECTED] From: Rob Kimberley [EMAIL PROTECTED] Subject: Re: [time-nuts] manual request: Austron 2201A Date: Thu, 19 Jul 2007 21:40:32 +0100 Message-ID: !!AAAYAOYAZyOzV8ERq+LmT45ypI7CgAAAEHNkDDJzE/pPgmle [EMAIL PROTECTED] Hi Rob, I agree. When I looked at the Quantic numbers you gave me, I sort of hit a mental block - not logical to me. Meinberg's current GPS antenna has following characteristics 10 MHz LO 35.4 MHz IF 12V - 18VDC Power http://www.meinberg.de/download/docs/manuals/english/gpsant.pdf For more info. Lower cable damping at lower frequencies allows for longer cable runs. Very handy when considering putting GPS receivers into underground telecom bunkers. Fiber link is also a very good thing in those cases. Both is a must if you want to play in that leage, and Meinberg wants that. Now, If you look at the Zarlink GP2015 GPS Frontend chip you will find how well it fits with this scheme. You apply 10 MHz to the chip, it PLL locks a 1,4 GHz VCO and mixes down with that (1575,42 - 1400 = 175,42 MHz), then it goes for a filtering round and then comes back for the second mixer at a tenth of the VCO frequency, i.e. 140 MHz (175,52 - 140 = 35,42 MHz) again goes out for a filtering-round (through a SAW filter) and back in for a mixdown with 31,11 MHz (actually 280 / 9 MHz) producing a 4,309 MHz signal which is then sampled at 5,714 MHz (actually 40 / 7 MHz) producing 1,405 MHz carrier frequency in the 5,714 Msamples/s 2-bit datastream. The Meinberg trick can be done by simply put one frontend chip in the antenna and another in the receiver. Both is fed the same 10 MHz clock but you pick up the signal after the 2nd mixdown stage and transport that IF over the cable and then toss in it at that place in the receivers frontend. The AGC there will automatically compensate for cable damping which happends around the 3rd mixdown. The HF part of the frontend in the receiver it just kept as dead functionality. Same goes for the 3rd stage in the antenna. Fairly clean and simple. Cheers, Magnus ___ 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. Genetix Limited - Queensway, New Milton, Hampshire, BH25 5NN Registered in England No. 2660050 www.genetix.com Any opinions expressed in this email are those of the individual and not necessarily Genetix Ltd (Genetix) or any company associated with it. This email and any files transmitted with it are confidential and solely for the use of the intended recipient. If you are not the intended recipient or the person responsible for delivering to the intended recipient, be advised that you have received this email in error and that any use is strictly prohibited. If you have received this email in error please notify Genetix by telephone on +44 (0)1425 624600. The unauthorised use, disclosure, copying or alteration of this message is strictly forbidden. This mail and any attachments have been scanned for viruses prior to leaving Genetix network. Genetix will not be liable for direct, special, indirect or consequential damages as a result of any virus being passed on, or arising from alteration of the contents of this message by a third party. ___ 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] manual request: Austron 2201A
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] The Meinberg antenna should work with the SatSync, although not tried one out. Rob -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Robert Atkinson Sent: 20 July 2007 08:16 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] manual request: Austron 2201A ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] om Hi, Many of the Odetics SatSync receivers also used this scheme. I've had a few of the receivers but never seen an antenna. Some were modified with a Magellan OEM 5000 module and use a standard (12V) antenna. Robert. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Magnus Danielson Sent: 20 July 2007 00:12 To: time-nuts@febo.com; [EMAIL PROTECTED] Subject: Re: [time-nuts] manual request: Austron 2201A ); SAEximRunCond expanded to false Errors-To: time-nuts-bounces+robert.atkinson=genetix.com+robert.atkinson=genetix.co [EMAIL PROTECTED] From: Rob Kimberley [EMAIL PROTECTED] Subject: Re: [time-nuts] manual request: Austron 2201A Date: Thu, 19 Jul 2007 21:40:32 +0100 Message-ID: !!AAAYAOYAZyOzV8ERq+LmT45ypI7CgAAAEHNkDDJzE/pPgmle [EMAIL PROTECTED] Hi Rob, I agree. When I looked at the Quantic numbers you gave me, I sort of hit a mental block - not logical to me. Meinberg's current GPS antenna has following characteristics 10 MHz LO 35.4 MHz IF 12V - 18VDC Power http://www.meinberg.de/download/docs/manuals/english/gpsant.pdf For more info. Lower cable damping at lower frequencies allows for longer cable runs. Very handy when considering putting GPS receivers into underground telecom bunkers. Fiber link is also a very good thing in those cases. Both is a must if you want to play in that leage, and Meinberg wants that. Now, If you look at the Zarlink GP2015 GPS Frontend chip you will find how well it fits with this scheme. You apply 10 MHz to the chip, it PLL locks a 1,4 GHz VCO and mixes down with that (1575,42 - 1400 = 175,42 MHz), then it goes for a filtering round and then comes back for the second mixer at a tenth of the VCO frequency, i.e. 140 MHz (175,52 - 140 = 35,42 MHz) again goes out for a filtering-round (through a SAW filter) and back in for a mixdown with 31,11 MHz (actually 280 / 9 MHz) producing a 4,309 MHz signal which is then sampled at 5,714 MHz (actually 40 / 7 MHz) producing 1,405 MHz carrier frequency in the 5,714 Msamples/s 2-bit datastream. The Meinberg trick can be done by simply put one frontend chip in the antenna and another in the receiver. Both is fed the same 10 MHz clock but you pick up the signal after the 2nd mixdown stage and transport that IF over the cable and then toss in it at that place in the receivers frontend. The AGC there will automatically compensate for cable damping which happends around the 3rd mixdown. The HF part of the frontend in the receiver it just kept as dead functionality. Same goes for the 3rd stage in the antenna. Fairly clean and simple. Cheers, Magnus ___ 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. Genetix Limited - Queensway, New Milton, Hampshire, BH25 5NN Registered in England No. 2660050 www.genetix.com Any opinions expressed in this email are those of the individual and not necessarily Genetix Ltd (Genetix) or any company associated with it. This email and any files transmitted with it are confidential and solely for the use of the intended recipient. If you are not the intended recipient or the person responsible for delivering to the intended recipient, be advised that you have received this email in error and that any use is strictly prohibited. If you have received this email in error please notify Genetix by telephone on +44 (0)1425 624600. The unauthorised use, disclosure, copying or alteration of this message is strictly forbidden. This mail and any attachments have been scanned for viruses prior to leaving Genetix network. Genetix will not be liable for direct, special, indirect or consequential damages as a result of any virus being passed on, or arising from alteration of the contents of this message by a third party. ___ 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] manual request: Austron 2201A
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Jamie, I believe I have one in the store. Will take a look tonight when I get back. May also be some of the module manuals. What plug-ins does it have? Rob Kimberley -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of James R. Gorr Sent: 18 July 2007 23:30 To: time-nuts@febo.com Subject: [time-nuts] manual request: Austron 2201A ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] om Looking for a manual for an Austron 2201A GPS receiver. Thanks! --Jamie Fedora Core 4 Linux Ready for the edge of your seat? Check out tonight's top picks on Yahoo! TV. http://tv.yahoo.com/ ___ 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] manual request: Austron 2201A
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Thanks, Rob! My unit has: 23411437-2 Time Code (IRIG-B) 23411900 Sine Output I also have a 23412342 LORAN MODULE, not sure if it is for this unit. Thanks for checking. Jamie --- Rob Kimberley [EMAIL PROTECTED] wrote: Jamie, I believe I have one in the store. Will take a look tonight when I get back. May also be some of the module manuals. What plug-ins does it have? Rob Kimberley -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of James R. Gorr Sent: 18 July 2007 23:30 To: time-nuts@febo.com Subject: [time-nuts] manual request: Austron 2201A ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] om Looking for a manual for an Austron 2201A GPS receiver. Thanks! --Jamie Building a website is a piece of cake. Yahoo! Small Business gives you all the tools to get online. http://smallbusiness.yahoo.com/webhosting ___ 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] manual request: Austron 2201A
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Hi Jamie, Config sounds reasonable. The 2201A did have a LORAN-C assist module. Will check through and let you know what I have. Will only ask that you cover any postage charges on the package. Payment via PayPal works for me. Rob -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of James R. Gorr Sent: 19 July 2007 15:28 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] manual request: Austron 2201A ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] om Thanks, Rob! My unit has: 23411437-2 Time Code (IRIG-B) 23411900 Sine Output I also have a 23412342 LORAN MODULE, not sure if it is for this unit. Thanks for checking. Jamie --- Rob Kimberley [EMAIL PROTECTED] wrote: Jamie, I believe I have one in the store. Will take a look tonight when I get back. May also be some of the module manuals. What plug-ins does it have? Rob Kimberley -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of James R. Gorr Sent: 18 July 2007 23:30 To: time-nuts@febo.com Subject: [time-nuts] manual request: Austron 2201A ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] time-nuts-bounces+bo.c om Looking for a manual for an Austron 2201A GPS receiver. Thanks! --Jamie Building a website is a piece of cake. Yahoo! Small Business gives you all the tools to get online. http://smallbusiness.yahoo.com/webhosting ___ 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] manual request: Austron 2201A
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Jamie, Have checked and have the following 2201 manuals (note not 2201A) Model 2201 Op Maintenance manual P/N 12711946 REV A (received from Austron March '91) 2200/2201 Loran-C Assist Module Option P/N 12812503 2029A GPS Antenna P/N 12712553-2 REV A (received from Austron March '92) 2201 OCXO Option Module Manual P/N 12712281 REV A (March '91) 2201 OCXO Option Module Manual P/N 12712122 REV A (March '91) Let me know if you are interested and your mailing address. Rob -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of James R. Gorr Sent: 19 July 2007 15:28 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] manual request: Austron 2201A ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] om Thanks, Rob! My unit has: 23411437-2 Time Code (IRIG-B) 23411900 Sine Output I also have a 23412342 LORAN MODULE, not sure if it is for this unit. Thanks for checking. Jamie --- Rob Kimberley [EMAIL PROTECTED] wrote: Jamie, I believe I have one in the store. Will take a look tonight when I get back. May also be some of the module manuals. What plug-ins does it have? Rob Kimberley -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of James R. Gorr Sent: 18 July 2007 23:30 To: time-nuts@febo.com Subject: [time-nuts] manual request: Austron 2201A ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] time-nuts-bounces+bo.c om Looking for a manual for an Austron 2201A GPS receiver. Thanks! --Jamie Building a website is a piece of cake. Yahoo! Small Business gives you all the tools to get online. http://smallbusiness.yahoo.com/webhosting ___ 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] manual request: Austron 2201A
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Hi Brooke, Good to hear from you. The Austron 2029A used 10 MHz LO and a 75.42MHz IF. Power was 15VDC at 175mA. The manual I have is pretty thin - no schematics just a spec block diagram and an installation guide. Will email you block diagram directly. Rob -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brooke Clarke Sent: 19 July 2007 18:22 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] manual request: Austron 2201A ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] om Hi Rob: I have an Quantic Q5200 GPS receiver that needs a special down converting antenna and have never seen one. I've thought of making one, but don't have enough information for the design. Does the 2029A manual have a block diagram or other design information? The Q5200 sends both +15 Vdc power and a 11.114 MHz reference frequency up the cable to the Antenna Module. The Antenna Module receives the satellite L1 frequency and down converts the signal to an IF of 153.028 MHz which is sent down the cable to the receiver. http://www.prc68.com/I/Q5200.shtml But how is a mystery. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Rob Kimberley wrote: ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Jamie, Have checked and have the following 2201 manuals (note not 2201A) Model 2201 Op Maintenance manual P/N 12711946 REV A (received from Austron March '91) 2200/2201 Loran-C Assist Module Option P/N 12812503 2029A GPS Antenna P/N 12712553-2 REV A (received from Austron March '92) 2201 OCXO Option Module Manual P/N 12712281 REV A (March '91) 2201 OCXO Option Module Manual P/N 12712122 REV A (March '91) Let me know if you are interested and your mailing address. Rob -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of James R. Gorr Sent: 19 July 2007 15:28 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] manual request: Austron 2201A ); SAEximRunCond expanded to false Errors-To: time-nuts-bounces+rk=timing-consultants.com+rk=timing-consultants.com@ time-nuts-bounces+febo.c om Thanks, Rob! My unit has: 23411437-2 Time Code (IRIG-B) 23411900 Sine Output I also have a 23412342 LORAN MODULE, not sure if it is for this unit. Thanks for checking. Jamie --- Rob Kimberley [EMAIL PROTECTED] wrote: Jamie, I believe I have one in the store. Will take a look tonight when I get back. May also be some of the module manuals. What plug-ins does it have? Rob Kimberley -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of James R. Gorr Sent: 18 July 2007 23:30 To: time-nuts@febo.com Subject: [time-nuts] manual request: Austron 2201A ); SAEximRunCond expanded to false Errors-To: time-nuts-bounces+rk=timing-consultants.com+rk=timing-consultants.com@ time-nuts-bounces+fe time-nuts-bounces+bo.c om Looking for a manual for an Austron 2201A GPS receiver. Thanks! --Jamie __ __ Building a website is a piece of cake. Yahoo! Small Business gives you all the tools to get online. http://smallbusiness.yahoo.com/webhosting ___ 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] manual request: Austron 2201A
Hi Rob: The Austron antenna is very straight forward. A 10.0 MHz ref is sent up the coax along with 15VDC. The antenna multiplied by 50 and uses the 500 MHz to drive a harmonic mixer thus subtracting 1500 MHz from L1 leaving 75 MHz to go down the coax. Simple and clean. There must have been some special consideration that caused Quantic to use such a strange scheme. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Rob Kimberley wrote: Hi Brooke, Good to hear from you. The Austron 2029A used 10 MHz LO and a 75.42MHz IF. Power was 15VDC at 175mA. The manual I have is pretty thin - no schematics just a spec block diagram and an installation guide. Will email you block diagram directly. Rob -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brooke Clarke Sent: 19 July 2007 18:22 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] manual request: Austron 2201A ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] om Hi Rob: I have an Quantic Q5200 GPS receiver that needs a special down converting antenna and have never seen one. I've thought of making one, but don't have enough information for the design. Does the 2029A manual have a block diagram or other design information? The Q5200 sends both +15 Vdc power and a 11.114 MHz reference frequency up the cable to the Antenna Module. The Antenna Module receives the satellite L1 frequency and down converts the signal to an IF of 153.028 MHz which is sent down the cable to the receiver. http://www.prc68.com/I/Q5200.shtml But how is a mystery. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com ___ 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] manual request: Austron 2201A
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Hi Brooke, I agree. When I looked at the Quantic numbers you gave me, I sort of hit a mental block - not logical to me. Meinberg's current GPS antenna has following characteristics 10 MHz LO 35.4 MHz IF 12V - 18VDC Power http://www.meinberg.de/download/docs/manuals/english/gpsant.pdf For more info. Rob -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brooke Clarke Sent: 19 July 2007 20:50 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] manual request: Austron 2201A ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] om Hi Rob: The Austron antenna is very straight forward. A 10.0 MHz ref is sent up the coax along with 15VDC. The antenna multiplied by 50 and uses the 500 MHz to drive a harmonic mixer thus subtracting 1500 MHz from L1 leaving 75 MHz to go down the coax. Simple and clean. There must have been some special consideration that caused Quantic to use such a strange scheme. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Rob Kimberley wrote: Hi Brooke, Good to hear from you. The Austron 2029A used 10 MHz LO and a 75.42MHz IF. Power was 15VDC at 175mA. The manual I have is pretty thin - no schematics just a spec block diagram and an installation guide. Will email you block diagram directly. Rob -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brooke Clarke Sent: 19 July 2007 18:22 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] manual request: Austron 2201A ); SAEximRunCond expanded to false Errors-To: time-nuts-bounces+rk=timing-consultants.com+rk=timing-consultants.com@ time-nuts-bounces+febo.c om Hi Rob: I have an Quantic Q5200 GPS receiver that needs a special down converting antenna and have never seen one. I've thought of making one, but don't have enough information for the design. Does the 2029A manual have a block diagram or other design information? The Q5200 sends both +15 Vdc power and a 11.114 MHz reference frequency up the cable to the Antenna Module. The Antenna Module receives the satellite L1 frequency and down converts the signal to an IF of 153.028 MHz which is sent down the cable to the receiver. http://www.prc68.com/I/Q5200.shtml But how is a mystery. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com ___ 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] manual request: Austron 2201A
From: Rob Kimberley [EMAIL PROTECTED] Subject: Re: [time-nuts] manual request: Austron 2201A Date: Thu, 19 Jul 2007 21:40:32 +0100 Message-ID: !!AAAYAOYAZyOzV8ERq+LmT45ypI7CgAAAEHNkDDJzE/[EMAIL PROTECTED] Hi Rob, I agree. When I looked at the Quantic numbers you gave me, I sort of hit a mental block - not logical to me. Meinberg's current GPS antenna has following characteristics 10 MHz LO 35.4 MHz IF 12V - 18VDC Power http://www.meinberg.de/download/docs/manuals/english/gpsant.pdf For more info. Lower cable damping at lower frequencies allows for longer cable runs. Very handy when considering putting GPS receivers into underground telecom bunkers. Fiber link is also a very good thing in those cases. Both is a must if you want to play in that leage, and Meinberg wants that. Now, If you look at the Zarlink GP2015 GPS Frontend chip you will find how well it fits with this scheme. You apply 10 MHz to the chip, it PLL locks a 1,4 GHz VCO and mixes down with that (1575,42 - 1400 = 175,42 MHz), then it goes for a filtering round and then comes back for the second mixer at a tenth of the VCO frequency, i.e. 140 MHz (175,52 - 140 = 35,42 MHz) again goes out for a filtering-round (through a SAW filter) and back in for a mixdown with 31,11 MHz (actually 280 / 9 MHz) producing a 4,309 MHz signal which is then sampled at 5,714 MHz (actually 40 / 7 MHz) producing 1,405 MHz carrier frequency in the 5,714 Msamples/s 2-bit datastream. The Meinberg trick can be done by simply put one frontend chip in the antenna and another in the receiver. Both is fed the same 10 MHz clock but you pick up the signal after the 2nd mixdown stage and transport that IF over the cable and then toss in it at that place in the receivers frontend. The AGC there will automatically compensate for cable damping which happends around the 3rd mixdown. The HF part of the frontend in the receiver it just kept as dead functionality. Same goes for the 3rd stage in the antenna. Fairly clean and simple. Cheers, Magnus ___ 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] manual request: Austron 2201A
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Looking for a manual for an Austron 2201A GPS receiver. Thanks! --Jamie Fedora Core 4 Linux Ready for the edge of your seat? Check out tonight's top picks on Yahoo! TV. http://tv.yahoo.com/ ___ 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] manual request: Austron 2201A
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Hello Jamie, I looked at one on ebay recently. Talked with a former Austron salesman and that unit was the original of all GPS receivers. It had a special block downconverting front end and antenna, not just amplified and filtered RF, as is common today. Without the special front end it was a no bid for me. Stan, W1LE Cape CodFN41sr James R. Gorr wrote: ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Looking for a manual for an Austron 2201A GPS receiver. Thanks! --Jamie Fedora Core 4 Linux Ready for the edge of your seat? Check out tonight's top picks on Yahoo! TV. http://tv.yahoo.com/ ___ 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.
