Dave upgrades his HP/Agilent 53131A frequency counter with an ovenised oscillator module from ebay.
www.ebay.com.au/itm/121330209846
www.thinksrs.com/downloads/PDF...
www.2917.com/EBAY-images/NOX01...
cp.literature.agilent.com/litw...
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31 июл 2014