The GDP Model 650 Data Transmission Test Set fills the need for high performance data-link verification and qualification at an affordable price. The user is provided with totally independent transmit and receive functions to allow rapid fault isolation and data link characterization. Simulated signal perturbations are created in the test lab by adding noise, baseline offset and varying signal levels. Features such as an internal 6-digit frequency synthesizer and IRIG Code generator and converter make the Model 650 especially suited to the test and evaluation of PCM Telemetry data link systems and components. 

The Model 650 provides measurement capability for: Accumulated Bit Errors, Measured Bit Error Rate, Elapsed Test Time, Accumulated Errored Seconds, Errors per Second, Measured Error Symmetry, Accumulated Bit Count Integrity Loss (Bit Slips), Measured Transmit and Receive Clock Rate. 

Operating ease and test flexibility is the result of using microprocessor control to augment high speed hardware functions. A high contrast vacuum fluorescent display provides setup and test result information in easy-to-use formats.