The Rohde & Schwarz SPNH is a synthesized audio signal generator delivering precise, low-distortion signals across the audible spectrum. Operating from 20 Hz to 20 kHz, it generates sine and square waveforms with distortion as low as 0.03% (50 Hz to 100 kHz) and output levels spanning 4.25 mV to 42.5 V into 600 Ω. The instrument combines rapid 50 ms switching, microprocessor control, and flexible output impedance selection to meet exacting requirements in audio testing, R&D, and production environments.
Technical Specifications
• Frequency Range: 20 Hz to 20 kHz
• Output Level: 4.25 mV to 42.5 V into 600 Ω; display shows 3-digit meter with selectable units (mV, V, dBV, or dBm)
• Distortion: As low as 0.03% (50 Hz to 100 kHz)
• Switching Time: 50 ms
• Output Impedance: Selectable—600 Ω, 50 Ω, or approximately 5 Ω
• Waveforms: Low-distortion sine wave and square wave (TTL, positive)
• Signal Purity: High spectral purity and stability
• Sweep Modes: External signal sweep in linear or logarithmic modes
– Key Features
• 5-digit digital frequency display
• 3-digit output level meter with unit conversion (mV, V, dBV, dBm) via button selection
• Keypad data entry with rotary knob for quasi-analog adjustment
• Memory storage for up to five complete instrument configurations (addresses 1–5)
• Microprocessor-controlled operation
• Parallel connection capability—dual SPNH sine outputs connectable due to linear, real output impedance
– Typical Applications
• Demanding audio signal testing
• Research and development
• Production-line validation
• Low-distortion waveform generation for precision measurements
– Compatibility & Integration
Two SPNH units may be connected in parallel via their sine wave outputs, enabled by the instrument’s linear and real output impedance characteristics. Selectable output impedance (600 Ω, 50 Ω, 5 Ω) accommodates diverse system matching requirements.
