The S-1403DL/MLD Mode S accessory unit supports the new Mode S Data Link and ADS-B (extended DF17 squitter). The “DL” is backward compatible with the “C” model. Current ATE programs implemented on the S-1403C will operate with the S-1403DL/MLD without program changes. The unit provides additional pulse code modulation, as specified by RTCA/DO-181 to the ATC-1400A for testing ATCRBS and Mode S transponders, including Data Link, ADS-B and MLD (Multi Level Diversity) requirements. The S-1403DL/MLD may also be used as a stand-alone unit to perform limited Mode S tests.

• Over 30 new screens, including support for MTL, Comm C and Comm D formats
• Remote Operation via IEEE 488.2-19887 or RS-232
• Continuous rotation "SLEW" control as an alternate to keypad data entry
• Rear panel interconnects for control and signal monitoring
• Control of P2, P3, P4 and P6 width, offset and amplitude
• Fixed frequency/fixed level RF output for diversity antenna testing
• Mode S interrogation up to 2500 PRF burst
• Onboard GPIB Interface to increase the speed of ATE test routines
• User-defined screens for user-specific tests
• PRF generator from 99.999 sec to 2500 Hz
• Flash memory for easy firmware upgrades
• Two Year Limited Warranty