The Rohde & Schwarz ESCI is a dual-function EMI test receiver and spectrum analyzer covering 9 kHz to 3 GHz, engineered for EMC compliance certification and product development. It delivers measurement uncertainty below 1 dB across its full frequency range, with a displayed average noise level of typically −155 dBm (RBW = 10 Hz, preamplifier on). The instrument combines an LSI frontend with digital signal processing to achieve high reliability and measurement accuracy across CISPR, EN, ETS, FCC, ANSI C63.4, VCCI, and VDE standards.
Technical Specifications
Frequency Coverage: 9 kHz to 3 GHz
Measurement Bandwidths:
• EMI measurement: 200 Hz, 9 kHz, 120 kHz, 1 MHz
• Resolution bandwidths (analyzer mode, −3 dB): 10 Hz to 3 MHz in 1/3/10 steps
• Digital filters: 1 Hz to 30 kHz
• Channel filters: 100 Hz to 5 MHz
Detector Suite:
• Peak (max/min), quasi-peak, average, CISPR average, RMS, RMS-average
• Up to three detectors simultaneously selectable
• CISPR 16-1-1 pulse weighting via quasi-peak detector
Sensitivity and Dynamic Range:
• Total measurement uncertainty: < 1 dB (to 3 GHz)
• Displayed Average Noise Level: typically −155 dBm (RBW = 10 Hz, preamplifier on)
• 1 dB compression point: +5 dBm nominal (without preselection)
• Phase noise at 500 MHz: typically −113 dBc (1 Hz) at 10 kHz offset
Preselection and Gain:
• Built-in 20 dB preamplifier
• 11 preselection filters with integrated switch selection
• ESCI7 model: twelve preselection filters extending to 7 GHz
Measurement Speed:
• Receiver mode: from 100 µs (SCAN mode)
• Spectrum analyzer sweep: 2.5 ms to 16,000 s (span ≥ 10 Hz)
• Zero span (time domain): 1 µs to 16,000 s resolution at 125 ns
– Key Features
• 21 cm TFT color display with simultaneous multiple trace measurement
• Programmable scan table with up to ten subranges
• Limit lines for civil standards compliance
• Frequency-dependent transducer factor management
• Time domain analysis for click interference measurement
• Fast adjacent-channel power (ACP) measurements
– Typical Applications
• EMC certification testing to CISPR, EN, FCC, and ANSI standards
• Pre-compliance product development and troubleshooting
• Spectral purity analysis and phase noise characterization
• Broadband and narrowband interference identification
– Compatibility & Integration
The ESCI complies with civil EMI standards including CISPR, EN, ETS, FCC, ANSI C63.4, VCCI, and VDE, enabling certification-grade measurements across regulated frequency bands.
