The DDC SIM-31201 is a precision microprocessor-based synchro/resolver simulator engineered to generate accurate angle signals for verification and calibration of position control systems, navigation equipment, and angle-dependent measurement instruments. The instrument combines front-panel keyboard and display operation with IEEE-488 (GPIB) remote programming, making it suitable for production testing, quality control, laboratory work, and field service environments. Its solid-state design delivers stable, programmable synchro and resolver outputs across multiple voltage levels and standard power-line frequencies.
## Technical Specifications
• **Output Voltage (Programmable):** 11.8 V RMS, 25 V RMS, or 90 V RMS nominal
• **Frequency:** 47 to 63 Hz standard; 400 Hz available upon factory consultation
• **Display:** 6-digit, 0.43″ LED with polarizing filter
• **Power Input:** 115 V nominal (35 V for 26 V nominal output)
• **Power Supply Frequency:** 47 to 63 Hz
• **Interface Connectors:** IEEE-488 (GPIB) with Amphenol 17-18500-1 mating connector supplied; parallel digital I/O
## Key Features
• Programmable output angle generation
• Front-panel keyboard and 6-digit LED display with polarizing filter
• Status indicators: Local, remote, synchro, resolver, 11.8 V, 26 V, 90 V, overload, and reference loss (all LED)
• IEEE-488 interface supporting talk/listen and serial poll operations
• Parallel digital input/output for remote control
• Command concatenation capability with linefeed terminator (carriage return optional)
• Rear-panel EMI/RFI filter and integrated cooling fan
• Lightweight, compact design
## Typical Applications
• Production testing and quality control verification
• Position control system calibration
• Navigation equipment testing
• Laboratory angle measurement and simulation
• Field service and troubleshooting
## Compatibility & Integration
The SIM-31201 integrates into automated test equipment (ATE) environments via IEEE-488 control or standalone benchtop operation. It pairs with external angle indicators such as the SR-203 or HSR-203 for combined stimulus and measurement capability.
