Yes, I should have realized that it wasn't comparing the GPSDO against anything. So, what is the point of this graph in Z38xx?
On Wed, Mar 16, 2016 at 7:39 PM, Bob Camp <kb...@n1k.org> wrote: > Hi > > Be *very* careful looking at plots based on translated DAC readings. You > don’t really have all you need to come up with proper numbers. A simple scale > error can make things look much better or much worse than they actually are. > > Bob > >> On Mar 16, 2016, at 7:54 PM, Joseph Gray <jg...@zianet.com> wrote: >> >> Well, the 4-port serial to Ethernet converter has been running for 22 >> hours, collecting data from two GPSDO's and it hasn't missed a beat. >> >> Although I have had the Lucent unit running for several months, this >> is the first time I have hooked up to the RS-422 port and taken data >> from it. From the look of this graph, it seems to be performing quite >> well. >> >> https://dl.dropboxusercontent.com/u/19599147/Lucent%20Adev.png >> >> Joe Gray >> W5JG >> >> >> On Tue, Mar 15, 2016 at 7:05 PM, Joseph Gray <jg...@zianet.com> wrote: >>> On Thu, Feb 25, 2016 at 1:38 AM, Tom Van Baak <t...@leapsecond.com> wrote: >>>> >>>> And, if you have a couple of 422 devices, consider the economics of a >>>> 4-port unit like: >>>> >>>> http://www.ebay.com/itm/301881123530 >>> >>> As promised, I am reporting on the USR-N540, 4-serial-port to Ethernet >>> box that Tom linked to. I had originally found it for less, but after >>> ordering, the seller emailed back to tell me he had no more at that >>> price. In any event, after about three weeks from China, my unit >>> arrived today. I haven't had any long term experience with this thing, >>> so hopefully it will continue to work. >>> >>> It was very well packed in a small box with hard foam. Included are >>> the converter box, wall wart (switcher), 2-pin screw terminal power >>> adapter, serial cable, Ethernet cable and four DE-9 to 4-pin screw >>> terminal adapters (for RS-422, RS-485). No documentation and no >>> software. The box is made from steel and seems substantial. The power >>> input is labeled "DC: 9-24V". >>> >>> I downloaded manuals and software from here: >>> http://www.usriot.com/p/4-serial-port-to-ethernet-converter/ >>> >>> One annoying thing is that the box is setup with a static IP, instead >>> of DHCP. The default IP of 192.168.0.7 is printed on the bottom, as >>> well as in the manual. The MAC address is not printed on the bottom. >>> The manual also lists the default login credentials. >>> >>> I initially only configured Port 1 in the web interface, to test with >>> my HP Z3801A (RS-232, 19200, 7, odd, 1). I then installed the Virtual >>> Serial Port software. This seems to be a licensed version of the >>> Eltima software http://www.eltima.com/products/vspdxp/. Or, perhaps >>> the Eltimat software is licensed from USR IOT? >>> >>> In the software, you can click on the "Smart VCOM" button and all four >>> ports will be assigned for you, using the first available port numbers >>> on your PC. I wanted a sequential range of 10-13, so I configured each >>> port individually, using the "Add COM" button. The interface box uses >>> TCP/IP ports of 23, 26, 29 and 32 by default, but these can be changed >>> in the web interface. Interestingly, the MAC address can also be >>> changed. >>> >>> The web interface is very well laid out and logical, as is the Virtual >>> Serial Port software. I have been connected to the Z3801A for almost >>> half an hour and things seem to be working just fine. I'll update if I >>> encounter any problems later. I will have to try the RS-422 with my >>> Lucent GPSDO. >>> >>> All in all, I am pleased with this converter box. At $20 per port, it >>> seems like a good deal for a new item. I know that others are using >>> surplus terminal servers that they bought for less. >>> >>> Approximate dimensions: 8.5" (including mounting ears) x 4.75" x 1.2" >>> >>> Joe Gray >>> W5JG >> _______________________________________________ >> 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.