The Stanford Research Systems SIM983 1 MHz Scaling Amplifier is a precision analog signal conditioning module that delivers adjustable gain and offset control with 3½-digit resolution. Operating across DC to 1 MHz bandwidth, it serves applications demanding low-noise signal manipulation without distortion. The module features a 1 MΩ input impedance, 45 nV/√Hz input noise at 1 kHz, and exceptional slew rate of 70 V/µs. Its proprietary clock-stopping architecture minimizes digital noise by activating the microcontroller only during adjustments or communications, preserving signal integrity in sensitive measurements.
Technical Specifications
• Bandwidth: DC to 1 MHz
• Input Impedance: 1 MΩ
• Input Noise: 45 nV/√Hz @ 1 kHz
• Maximum Input Voltage: ±10 V
• Maximum Output Voltage: ±10 V
• Gain Range: ±0.01 to ±19.99
• Offset Range: ±10 V (3½-digit resolution: 0.001 V for |Vofs| < 2.00 V; 0.01 V for |Vofs| ≥ 2.00 V)
• Offset Accuracy: ±1 mV ± 0.02%
• Total Harmonic Distortion: 0.003% (90 dB) @ 1 kHz
• Slew Rate: 70 V/µs
• Operating Temperature: 0 °C to 40 °C, non-condensing
• Power Supply: ±15 VDC (300 mA max.), +5 VDC (100 mA max.)
• Dimensions: 1.5" W × 3.6" H × 7.0" D
• Weight: 1.5 lbs
– Key Features
• Clock-stopping architecture eliminates microcontroller noise during quiescent operation
• Non-volatile memory retention of gain and offset settings across power cycles
• BNC front-panel connectors for signal routing; rear-panel BNC for auxiliary connections
• Remote control via serial interface (RS-232 or GPIB) through SIM900 Mainframe
• Self-test capability (*TST? command support)
• Low-noise input circuitry for sensitive analog signal conditioning
– Compatibility & Integration
The SIM983 integrates within the SRS SIM900 Mainframe or operates independently with user-supplied DC power (±15 VDC, +5 VDC). Serial interface via DB15 (male) connector enables remote programming and command execution.
