A compact and fully independent design (no need for a PC to run measurements), 4 inputs at any frequency between 1 MHz and 100 MHz, and up to 4 simultaneous measurements. It measures phase and frequency up to 3 DUTs against one reference or measures small ensembles of DUTs and references. Capable of Cross-Correlation and Cross-Spectrum to perform 3 and 4 corner-hat measurements, full 3 corner-hats (all 3 oscillators are measured simultaneously), and phase and amplitude noise measurements.

Expected delivery in Q2 2027. Current working prototype in the picture!

For 100 MHz carriers, the SMS’ residual ADEV approaches 5e-16/√τ (0.5 Hz BW) without the use of cross-correlation averaging thanks to Flicker Suppressed Direct-Digital. Unlike the competition, this noise-floor is instantaneous, and up to 3 DUTs can be measured against a reference simultaneously.

Only the best optical cavities and atomic clocks can challenge the SMS’s noise-floor, and if you do work on them, cross-correlation averaging can be enabled to go beyond 5e-16/√τ or for 3-cornered hat measurements.

Temporis’ SMS has also a new feature to help labs working on cutting-edge technology: 4-cornered hat. If your references are not good enough to measure your new oscillator, and a 3-cornered hat takes too long, you can add a third reference and converge to the result up to 50% faster.