The Data Device Corp HSR-203 is a high-precision synchro and resolver angle indicator that converts synchro or resolver inputs into BCD angular data with real-time front panel display. Engineered for demanding test, control, and computation environments, the HSR-203 delivers ±0.005° accuracy and ±0.001° resolution across a broadband 47 Hz to 1000 Hz frequency range. The instrument features a Type II servo loop for continuous tracking with no velocity lag and eliminates 180° hangup errors. Its drift-free performance requires no warm-up, adjustments, or recalibration over the instrument’s lifetime.
## Technical Specifications
• Accuracy: ±0.005°
• Resolution: ±0.001°
• Frequency Bandwidth: 47 Hz to 1000 Hz
• Input Signal Compatibility: Wide range of voltages and frequencies without programming
• Maximum Signal to Reference Phase Shift: ±50°
• Display Format: Selectable unipolar (0–359.999°) or bipolar (0 to +179.999°)
• Servo Loop: Type II with no velocity lag and no 180° hangup
• Input Channels: One front panel, two rear panel
• Output: BCD angular data
• Logic Levels: TTL compatible
• Dimensions: 3.5 inches high, 1/2 rack space width
## Key Features
• Built-in Test (BITE) circuit detects over-velocity and internal malfunctions
• Display Ambiguity Indicator shows when output data is changing
• Fault Indicator signals loss of tracking
• Phase Shift Compensation accommodates ±50° signal-to-reference deviation
• Selectable input type (synchro or resolver) and bandwidth from front panel or rear connector
• Unipolar/bipolar output selection
• Lamp test and inhibit functions
• Optional IEEE-488 GPIB interface (HSR203-488 variant)
## Typical Applications
• Bench testing of synchro and resolver equipment
• Real-time angular measurement in control systems
• Precision angle indication in computation systems
• High-reliability test environments requiring zero drift
## Compatibility & Integration
Three mounting configurations are available: portable with carrying handle, half-rack with brackets, or center-mounted in a 19″ rack. All instruments include Amphenol 17-10500-1 mating connector and Belden 17250 detachable line cord. Remote control logic interfaces through rear connectors. Optional synthesized reference and automatic gain ranging are available in selected configurations.
