Quick brown fox

From HFUnderground

"THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG" is a testing message for radioteletype RTTY circuits (or RATT in military context).

French operators use instead the phrase " VOYEZ VOUS LE BRICK GEANT QUE J EXAMINE PRES DU GRAND WHARF"

See also: RYRYRYRYRYRY