5 to 400 MHz Phase Noise Tester APPH6000-IS400

The APPH6000-IS400 provides fast and accurate measurements of SSB phase noise, amplitude noise, or baseband noise. The APPH6000-IS400 is a very compact, fully self-contained instruments with cross-correlator engine and internal low noise reference sources to enable fast and accurate “one-click” measurements of a variety of sources. The instrument can be configured to meet user requirements: selectable internal or external reference source, phase detector models, and frequency offset ranges. Two channel cross correlation is also supported for lowest noise measurements. It is a compact and powerful instrument available with LAN (VXI-11), USB. Platform independent intuitive graphical user interface (GUI), API library, and powerful SCPI command language set is available.

Typical Phase Noise Plot


  • All-in-one compact measurement system
  • Measurements down to -180 dBc/Hz
  • Quick „One-click“ measurement
  • Selectable internal or external reference sources
  • Residual and additive noise measurements
  • Powerful graphical user interface (GUI)


    • General purpose phase noise tests
    • Crystal oscillator and VCO testing
    • PLL synthesizer locking and characterization
    • Supply noise verification
    • Automated production testing


    • 19’’ rackmount model


Measurement parametersSSB phase noise [dBc/Hz]
Frequency Range5 MHz to 400 MHzusing internal reference
5 MHz to 6 GHzusing external reference
Input Power Range-5 dBm to +18 dBm
-3 dBm to +18 dBm
Offset Analysis Range0.1 Hz to 1 MHz
System Phase Noise Floor
1 Hz-140 dBc/Hz(cross-correlation, external references)
10 Hz -150 dBc/Hz
100 Hz -160 dBc/Hz
1 kHz -165 dBc/Hz
10 kHz -172 dBc/Hz
10 MHz -172 dBc/Hz