wondering...there's a legitimate length restriction on USB cables...but, from the dongle to the radio...the audio and control signals...analog... Reason for asking...have my asterisk computer in the spare basement room here...right next to the radios. All the nice dongles blinking in unison..but...thinking (I know...dangerous) it would be nicer to actually have the computer in the same room as the rest of the shack, and the radios out in the other room so the fans on the power supply don't intrude, etc. And be able to sit at my work area, rather than standing in front of the rack...when I'm hacking at the configuration files, or...??? so...thoughts about how long the cables from the dongle to the radio itself could be before running into trouble? Not thinking of using JK (the old Bell 2-pair station wire, believe it or not, have a couple boxes left from the 80s...:)) or UTP...but, have a nice spool of belden 8451 (2 stranded conductor, shielded) that's used almost as a given in most commercial radio stations etc and we never had a problem with l-r phase shift or degradation (and this was running audio signals in a transmitter room with 25KW boxes and STLs, and the like floating around...). *shouldn't be a problem, right?* Just thinking out loud...I know, try it and see. BB
I think the problem is that the computer would be on a different part of your power system than the radios and that would cause ground loop issues, unless you add USB isolators like one posted here a few weeks ago. But I never stand in front of the rack. I am in the shack running SSH/WinSCP on the shack computer. Heck, I have even done program upgrades to the system while staying in hotels in foreign countries .... 73 GL Ken
-----Original Message----- From: app_rpt-users-bounces@ohnosec.org [mailto:app_rpt-users- bounces@ohnosec.org] On Behalf Of Bryan D. Boyle Sent: Sunday, December 04, 2011 9:24 PM To: app_rpt mailing list Subject: [App_rpt-users] wire length...
wondering...there's a legitimate length restriction on USB cables...but, from the dongle to the radio...the audio and control signals...analog...
Reason for asking...have my asterisk computer in the spare basement room here...right next to the radios. All the nice dongles blinking in unison..but...thinking (I know...dangerous) it would be nicer to actually have the computer in the same room as the rest of the shack, and the radios out in the other room so the fans on the power supply don't intrude, etc. And be able to sit at my work area, rather than standing in front of the rack...when I'm hacking at the configuration files, or...???
so...thoughts about how long the cables from the dongle to the radio itself could be before running into trouble?
Not thinking of using JK (the old Bell 2-pair station wire, believe it or not, have a couple boxes left from the 80s...:)) or UTP...but, have a nice spool of belden 8451 (2 stranded conductor, shielded) that's used almost as a given in most commercial radio stations etc and we never had a problem with l-r phase shift or degradation (and this was running audio signals in a transmitter room with 25KW boxes and STLs, and the like floating around...). *shouldn't be a problem, right?*
Just thinking out loud...I know, try it and see.
BB
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The spec for USB is 16 feet max. I have used a USB to cat 5 extender and extended over 100 feet and the URI worked fine. -----Original Message----- From: app_rpt-users-bounces@ohnosec.org [mailto:app_rpt-users-bounces@ohnosec.org] On Behalf Of Bryan D. Boyle Sent: Sunday, December 04, 2011 9:24 PM To: app_rpt mailing list Subject: [App_rpt-users] wire length... wondering...there's a legitimate length restriction on USB cables...but, from the dongle to the radio...the audio and control signals...analog... Reason for asking...have my asterisk computer in the spare basement room here...right next to the radios. All the nice dongles blinking in unison..but...thinking (I know...dangerous) it would be nicer to actually have the computer in the same room as the rest of the shack, and the radios out in the other room so the fans on the power supply don't intrude, etc. And be able to sit at my work area, rather than standing in front of the rack...when I'm hacking at the configuration files, or...??? so...thoughts about how long the cables from the dongle to the radio itself could be before running into trouble? Not thinking of using JK (the old Bell 2-pair station wire, believe it or not, have a couple boxes left from the 80s...:)) or UTP...but, have a nice spool of belden 8451 (2 stranded conductor, shielded) that's used almost as a given in most commercial radio stations etc and we never had a problem with l-r phase shift or degradation (and this was running audio signals in a transmitter room with 25KW boxes and STLs, and the like floating around...). *shouldn't be a problem, right?* Just thinking out loud...I know, try it and see. BB _______________________________________________ App_rpt-users mailing list App_rpt-users@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
I just extend the wiring from the radio to the fob/URI. I use 8 cond. 18AWG shielded cable. My cables are ~20 feet long to get from a wall rack to the radio rack. Jon On 12/4/2011 11:04 PM, Scott Weis wrote:
The spec for USB is 16 feet max. I have used a USB to cat 5 extender and extended over 100 feet and the URI worked fine.
-----Original Message----- From: app_rpt-users-bounces@ohnosec.org [mailto:app_rpt-users-bounces@ohnosec.org] On Behalf Of Bryan D. Boyle Sent: Sunday, December 04, 2011 9:24 PM To: app_rpt mailing list Subject: [App_rpt-users] wire length...
wondering...there's a legitimate length restriction on USB cables...but, from the dongle to the radio...the audio and control signals...analog...
Reason for asking...have my asterisk computer in the spare basement room here...right next to the radios. All the nice dongles blinking in unison..but...thinking (I know...dangerous) it would be nicer to actually have the computer in the same room as the rest of the shack, and the radios out in the other room so the fans on the power supply don't intrude, etc. And be able to sit at my work area, rather than standing in front of the rack...when I'm hacking at the configuration files, or...???
so...thoughts about how long the cables from the dongle to the radio itself could be before running into trouble?
Not thinking of using JK (the old Bell 2-pair station wire, believe it or not, have a couple boxes left from the 80s...:)) or UTP...but, have a nice spool of belden 8451 (2 stranded conductor, shielded) that's used almost as a given in most commercial radio stations etc and we never had a problem with l-r phase shift or degradation (and this was running audio signals in a transmitter room with 25KW boxes and STLs, and the like floating around...). *shouldn't be a problem, right?*
Just thinking out loud...I know, try it and see.
BB
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_______________________________________________ App_rpt-users mailing list App_rpt-users@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
I had a 33 ft usb cable for one of the repeaters at the site.. it ( the USB dongle .. a USB URI ) crashed on occasion so I made it shorter and it stopped crashing. They do manufacture usb cables with booster amplifiers in them, to increase length range beyond 16 feet. In this case, length it is more about signal losses, than timing.... Doug KD8B -----Original Message----- From: app_rpt-users-bounces@ohnosec.org [mailto:app_rpt-users-bounces@ohnosec.org] On Behalf Of Jon Rorke Sent: Monday, December 05, 2011 8:48 AM To: 'app_rpt mailing list' Subject: Re: [App_rpt-users] wire length... I just extend the wiring from the radio to the fob/URI. I use 8 cond. 18AWG shielded cable. My cables are ~20 feet long to get from a wall rack to the radio rack. Jon On 12/4/2011 11:04 PM, Scott Weis wrote:
The spec for USB is 16 feet max. I have used a USB to cat 5 extender and extended over 100 feet and the URI worked fine.
-----Original Message----- From: app_rpt-users-bounces@ohnosec.org [mailto:app_rpt-users-bounces@ohnosec.org] On Behalf Of Bryan D. Boyle Sent: Sunday, December 04, 2011 9:24 PM To: app_rpt mailing list Subject: [App_rpt-users] wire length...
wondering...there's a legitimate length restriction on USB cables...but, from the dongle to the radio...the audio and control signals...analog...
Reason for asking...have my asterisk computer in the spare basement room here...right next to the radios. All the nice dongles blinking in unison..but...thinking (I know...dangerous) it would be nicer to actually have the computer in the same room as the rest of the shack, and the radios out in the other room so the fans on the power supply don't intrude, etc. And be able to sit at my work area, rather than standing in front of the rack...when I'm hacking at the configuration files, or...???
so...thoughts about how long the cables from the dongle to the radio itself could be before running into trouble?
Not thinking of using JK (the old Bell 2-pair station wire, believe it or not, have a couple boxes left from the 80s...:)) or UTP...but, have a nice spool of belden 8451 (2 stranded conductor, shielded) that's used almost as a given in most commercial radio stations etc and we never had a problem with l-r phase shift or degradation (and this was running audio signals in a transmitter room with 25KW boxes and STLs, and the like floating around...). *shouldn't be a problem, right?*
Just thinking out loud...I know, try it and see.
BB
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_______________________________________________ App_rpt-users mailing list App_rpt-users@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
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participants (5)
-
Bryan D. Boyle -
Doug Bade -
Jon Rorke -
Ken -
Scott Weis