Using the Keysight 81133A/81134A Pulse Generator Combining Parameters for Signal Generation76 Keysight 81133A/81134A Pulse Generator User’s Guide, April 2015– Int. DirectAllows you to vary the clock derived from the internal YIGoscillator in the range of one octave.– Ext. DirectAllows you to vary the frequency of the external clock signalin the range of one octave.In external direct mode, the internal PLL is bypassed. Thisensures that the instrument frequency exactly follows theexternal clock.Range switching occurs at the following frequencies:– 1680 MHz– 840 MHz– 420 MHz– 210 MHz– 105 MHz– 52.5 MHz– 26.25 MHzNOTE The range-switching frequencies are based on 1680 MHz dividedby the frequency divider.
