DDS

We have two types of DDS (Direct Digital Synthesis) with USB port or Serial port.

Default values:

• For generate a fix output frequency you can use two reference possibilities:
  1. “Internal Clock Frequency: 400 MHz”
  2. “External Clock Frequency: 100 MHz”. Input power should be 10 dBm < P < 20 dBm.
• The output frequency can be only less than the reference frequency!

• When using divider setup with any input and output frequency, the input power should be:
  • f_in < 150 MHz ⇒ 10 dBm < P < 20 dBm
  • f_in > 150 MHz ⇒ P ~ 0 dBm
  • Devided by 2 isn't possible! (said Andreas from PTB)

• Software DDS for USB Type PTB DDS
• Datasheet/Manual:

• Datasheet/Manual: Anleitung zum Teilerumbau

• Software Terminal for Serial Type DDS
• Datasheet/Manual: