Model ND-3 is a phase noise detector module that may be used to measure AM or PM noise. The module
has a noise detector that can be used to make very high-resolution single channel measurements. Two
modules can be combined to create a dual channel measurement system. A dual-channel system with
cross-correlation noise analysis can allow an effective reduction of at least 10 – 20 dB from the system
noise floor. The IF amplifier has variable gain and bandwidth settings. The IF amplifier input can be
switched to the front panel to allow connection of an external mixer. A calibration input is available for
automatic gain calibration. The ND-3 includes an adjustable bandwidth phase-lock loop that can be used
when measuring oscillators to lock the reference and device under test. The ND-3NM plugs into the NMS mainframe and requires one of the Phase Noise Measurement
System Controllers. The NMSC-1 provides Fourier noise analysis from DC to 1 MHz from the carrier. The
NMSC-2 extends the Fourier frequency analysis range up to 40 MHz. The ND-3NM uses one slot of the
system mainframe.
Option 01: 2-26 GHz Mixer
Option 02: 18-45 GHz Mixer
For Medium Level Detector option (+10 dBm to +20 dBm) add -M to the part number.
For High Level Detector option (+15 dBm to +27 dBm) add -H to the part number.
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