Rohde & Schwarz SMHU 100KHz to 4.32GHz Signal Generator
The Rohde & Schwarz SMHU signal generator is a versatile instrument covering a frequency range from 100 kHz to 4.32 GHz. It delivers high-quality signals for various applications, including research, development, and production testing. With its excellent signal purity and modulation capabilities, the SMHU ensures accurate and reliable signal generation.
- Model
- Rohde & Schwarz SMHU
- Calibration
- Available on request
- Price
- $970
- Status
- In stock
- RFQ ref
- SMHU
This unit
The Rohde & Schwarz SMHU is a synthesized signal generator delivering precise signal generation across 100 kHz to 4.32 GHz, with capability to supply frequencies down to 1 kHz. Built for radio communications testing, research, development, and production environments, the SMHU combines exceptional spectral purity with versatile modulation and sweep capabilities. Its 0.1 Hz frequency resolution and sub-10 ms frequency setting time enable rapid, accurate signal development for adjacent-channel, in-channel, and out-of-channel measurements.
Technical Specifications
- Frequency range: 100 kHz to 4.32 GHz (down to 1 kHz capability)
- Frequency resolution: 0.1 Hz
- Frequency setting time: <10 ms standard; <1 ms in fast mode (up to 200 user-defined frequencies with trigger or memory sweep)
- Output level: −140 dBm to +13 dBm
- Phase noise: Extremely low across full frequency range; maintains low phase noise right to carrier
- Time base: OCXO (Oven Controlled Crystal Oscillator)
- Phase offset: 10° step resolution via keyboard or spinwheel entry
Key Features Modulation Support
- AM with modulation frequency range usable at carrier frequencies below 100 kHz; minimal phase shift at 30 Hz (AM DC); flat frequency response
- FM with DC to 1 MHz modulation frequency range; FM DC capability for FSK; high carrier-frequency accuracy and extremely small frequency offset in FM DC mode
- Phase modulation
- Pulse modulation: 20 ns typical rise/fall times (<10 ns above 200 MHz); 80 dB on/off ratio
- Digital modulation (SMHU58 variant): Broadband I/Q modulator, DC to 200 MHz modulation bandwidth; optional coders for DECT, NADC/PDC, PHS, CDMA, TETRA25; IQSIM-K software for user-programmable waveforms Sweep Capabilities
- Digital and analog sweep modes
- RF, AF, level, and memory sweeps
Typical Applications
- Local oscillator (LO) generation
- Low-noise reference source for noise measurement systems
- CEPT spurious rejection testing of radiotelephone equipment to 4 GHz
- Complex modulation signal generation for communications standards
Compatibility & Integration The SMHU58 variant incorporates an extremely broadband I/Q modulator, extending digital modulation versatility across PSK, QAM, and ASK schemes.
Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 100 kHz to 4.32 GHz (down to 1 kHz) | Power Range (dBm): '-140 dBm to +13 dBm |
Rohde & Schwarz SMHU — Repair & Calibration Service
Aumictech offers NIST-traceable calibration and repair for the Rohde & Schwarz SMHU. Calibration covers output frequency accuracy, output power level accuracy across the full frequency range, AM/FM/PM/pulse modulation accuracy, harmonic and spurious output levels, and phase noise floor verification. All calibrations ship with a NIST-traceable certificate. Turnaround is typically 1–3 business days after receipt.
Common Rohde & Schwarz SMHU faults: YIG oscillator failure (no output or loss of lock), step attenuator wear (output drops or steps at set attenuation), ALC loop failure (uncontrolled output power), I/Q modulator assembly failure. HP/Agilent 836xx series most common faults are YIG oscillator failure and step attenuator contact wear causing output steps or drops at specific attenuation settings. Keysight E4428C/E4438C units most commonly develop ALC loop failure and I/Q modulator assembly faults. YIG oscillator replacement and attenuator service are stocked repairs.
Rohde & Schwarz SMHU price
This Rohde & Schwarz SMHU is listed at $970. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.
Rohde & Schwarz SMHU calibration cost
NIST-traceable calibration for the Rohde & Schwarz SMHU is $450 (standard — pass/fail certificate and calibration sticker) or $650 (full measured data at every test point, reference standards documented, traceability chain included). Calibration for this instrument covers output frequency accuracy, output power level accuracy across the full frequency range, AM/FM/PM/pulse modulation accuracy, harmonic and spurious output levels, and phase noise floor verification. Turnaround is 1 to 3 business days after receipt. See full calibration details →
