TDEMI® X Series

The TDEMI X (eXtreme) series from Gauss Instruments is a fully digital, FFT-based EMI receiver and signal analyzer built around the company's multi-channel TDEMI architecture — effectively a large parallel bank of digital superheterodyne receivers that compresses full CISPR scans from hours into seconds. A standard instrument covers 9 kHz to its model frequency ceiling, with a conventional digital superhet path up to 1 GHz and an ultra-broadband down-conversion above 1 GHz feeding a 325 MHz digital IF.

Six frequency variants are offered — X1, X3, X6, X18, X26 and X40 — reaching 1, 3, 6, 18, 26.5 and 40 GHz respectively. The lower limit extends to 10 Hz (Option MIL/DO-UG) for MIL-STD-461 and DO-160 work, or down to DC (Option DC-UG). All six share a single hardware and software platform, and the frequency range can be extended in the field by adding the relevant module, so the series scales with the lab rather than forcing a replacement.

The instrument operates as a CISPR 16-1-1 / ANSI C63.2 compliant receiver, a real-time spectrogram, a (real-time) spectrum analyzer, and a 1 GHz-bandwidth time-domain oscilloscope, with optional APD/histogram, click-rate analysis (CISPR 14) and IQ analysis up to 200 MHz. Base real-time analysis bandwidth is 162.5 MHz, upgradeable to 325 MHz and to a 645 MHz fully gapless spectrogram that measures Quasi-Peak and CISPR-Average simultaneously — letting radiated-emission maximization run at all frequencies in parallel. An integrated multistage preselector and optional low-noise preamplifier system (PRLNA-UG / ULNA-UG) give a very low displayed noise floor and full image rejection across all modes. The system runs on an 8.4″ touchscreen with SCPI remote control, and integrates with the EMI64k automation suite for full-compliance and pre-compliance testing in chambers, OATS, GTEM and conducted setups. Made in Germany; recommended calibration interval 24 months.