As I mentioned about 6 months ago, I think the Extron ADA 6 300MX is a very handy and ready to go distribution amplifier. It has a switch so it can be DC or AC coupled. It has a built in PS. As it was intended for video applications it is currently set up for 75 ohms, which as mentioned previously should not cause any problems, and it has not for me. It has 4 sections with each section providing 6 outputs. So, there are a total of 28 BNCs on the rear panel. The 75 ohms is determined by fixed 75 ohm resistors, so, if one really wants 50 ohms, they just need to change the resistors. I am using one stock to distribute a rubidium to about 15 instruments on my test bench without a problem. I have bought a few for as low as $9.99 plus shipping on ebay. Personally, I highly recommend it. They seem to be very prevalent on ebay. The following URL is the specification:
http://www.extron.com/product/product.asp?id=ada6300mxhv&subtype=32&view=spe c#tabs Regards - Mike Mike B. Feher, N4FS 89 Arnold Blvd. Howell, NJ, 07731 732-886-5960 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brooke Clarke Sent: Friday, April 07, 2006 12:14 AM To: Discussion of precise time and frequency measurement Subject: [time-nuts] IC for 1 PPS Output Hi: I've got the TVB 1 PPS PIC circuit working and would like to add an output IC to drive 50 a couple of Ohm cables. Need two outputs, the normal 1 PPS and also the 10 kHz output since I think it would work with the SRS app note for making 1,000 TI measurements in one second to better see small offsets. I seem to remember that there may be an internal resistance already in some chips so putting a 47 or 50 Ohm resistor in series may result in an impedance above 50 Ohms. Any thoughts? Thanks, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
