RCA Rack June 23, 2014 360 × 480 RCA Rack RCA Rack Shown is the master frequency generator and master frequency standard. Share this:Click to print (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pocket (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Tumblr (Opens in new window)