Rohde & Schwarz XUC XSU 470-1000MHz Frequency Synthesizer Normal Freq Generator

Rohde & Schwarz XUC XSU 470-1000MHz Frequency Synthesizer Normal Freq Generator

The Rohde & Schwarz XUC is a Normal Frequency Generator (Normalfrequenz-Generator) with integrated frequency synthesizer covering 470 to 1000 MHz. It operates together with the companion XSU Steuergenerator und Netzgerat — a crystal oscillator and power unit — which provides the stable 10 MHz crystal reference and operating power for the system. The two sections are housed in a single benchtop/rack cabinet with the XUC synthesizer occupying the upper section and the XSU crystal oscillator and power unit in the lower section.

Specifications & What's Included

• Manufacturer: Rohde & Schwarz
• Upper Section Type: XUC – Normal Frequency Generator / Frequency Synthesizer
• Lower Section Type: XSU – Steuergenerator und Netzgerat (Crystal Oscillator & Power Unit)
• XUC BN Number: BN 444466 | FNr: F1771/19
• XSU BN Number: BN 444291 | FNr: F1767/17
• Frequency Range: 470 – 1000 MHz
• Frequency Adjustment: x10 MHz decade scale and 0–10 MHz fine scale (two separate dial/drum mechanisms on XUC front panel)
• Reference Oscillator: 10 MHz crystal oscillator in XSU section; crystal oscillator adjust (Steuergenerator-Abgleich) control on XSU front panel
• Output: 50 Ohm (Ausgang 50 Ohm) via BNC connector on XUC right-side panel
• Output Level: EMK (open-circuit voltage) with stepped attenuator controls (multiple dB steps visible on front panel)
• Operating Mode Selector: Betriebsart (selector switch) on XUC front panel
• Calibration: Nachzeichnung / Calibration (Nacheichung) adjustment on XUC lower panel
• Meters: Level/output meter on XUC; Thermometer (Therm.) meter on XSU for crystal oven temperature monitoring
• Status Indicators: XSU and XUC pilot lights (Tr1, Tr2, Betriebskontrolle check) on XSU section
• Country of Manufacture: Germany
• Form Factor: Benchtop / rack-compatible cabinet (carry handles on both sides)
• Includes: XUC Frequency Synthesizer section and XSU Crystal Oscillator & Power Unit section (complete two-section instrument)

Applications

The Rohde & Schwarz XUC Normalfrequenz-Generator was designed as a precision UHF frequency standard and signal source for laboratory calibration, frequency reference, and RF measurement applications in the 470–1000 MHz range — covering the UHF television broadcast band and adjacent spectrum. Instruments of this type were used in standards laboratories, broadcast engineering facilities, and RF research environments where a highly stable, synthesized frequency reference traceable to a crystal standard was required. The XSU crystal oscillator section provides a thermally stabilized 10 MHz reference that disciplines the XUC synthesizer, a design approach common to high-stability signal generators of the 1960s and 1970s. Rohde & Schwarz manufactured this class of instrument primarily for European broadcast, defense, and national-standards laboratory customers during that era. Today, instruments like this are sought by collectors of vintage test equipment, broadcast historians, and engineers maintaining or restoring period RF systems that require a period-correct frequency reference source.