All: The spec on the 10 MHz input on the FLEX-1500 is sine wave, 0 to +10 dBm. They will typically work over -2 dBm to +15 dBm without problems. So, if you have a source that puts out +12.5 dBm instead of +10 dBm, I would just plug it in and not worry about it.
--- Graham / KE9H == On Wed, Oct 20, 2010 at 10:42 AM, Steve Tripp (K1IIG) < [email protected]> wrote: > > I would think a simple TV splitter should work well and of course the more > outputs the more loss. I am using a Z3801 GPS reference into an active 4:1 > splitter by http://www.downeastmicrowave.com/ and it works well. I lock my > transverters and service monitors and will lock the 5000 when I get the v/u > transverters. At this time I am not sure what the output is but believe it > is 8-10dbm, time to measure it. > > Steve > K1IIG > > > > It appears that the 10mHz output from the >>> Trimble (+12.5dBm) is a little hot for the Flex, which wants to see >>> *<*+10dBm. >>> I've been told that the simplest, cheapest way to tame the Trimble is to >>> insert a splitter in the output, put a 75 ohm terminator on one side and >>> connect the other side to the Flex. >>> >> >> >> The Flex wants 0 to +10 max on the reference port, per the manual. Using >> a >> two way splitter between the Thunderbolt and the F5K drops the level about >> 3 >> dB, which is still close to the upper limit for the F5K. >> >> A better "losser" is a three or four way splitter. These will lose more >> power than the two way splitter. Using the terminators on the unused >> ports >> of the splitter is optional if there is nothing connected to the unused >> ports. If you were using the splitters to feed long lengths of coax cable >> from the splitter ports. than you would need to terminate the far end of >> the >> cables to prevent reflections which could change the splitter's loss, or, >> in >> the case of NTSC TV signals, cause severe ghosting in the picture. >> >> Or you could use an in-line 6 or 10 dB coax attenuator. >> >> 73, >> >> Ralph W5JGV - WD2XSH/7 >> >> >> _______________________________________________ >> Flexedge mailing list >> [email protected] >> http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz >> This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is >> used for posting topics related to SDR software development and >> experimentalist who are using beta versions of the software. >> > > > _______________________________________________ > Flexedge mailing list > [email protected] > http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz > This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used > for posting topics related to SDR software development and experimentalist > who are using beta versions of the software. > _______________________________________________ Flexedge mailing list [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used for posting topics related to SDR software development and experimentalist who are using beta versions of the software.
