This programmable source may be used as a stand alone DS-1 source for testing and loading DS-1 facilities, or it can serve as a DS-1 clock distribution unit by using the external clock input feature. With SF, ESF and OFF framing, patterns of standard QRSS, 3 in 24, 1's, two 2048-bytes programmable, and "THRU" with AMI or B8ZS coding, the TSI-1509A allows the testing of all current T carrier, fiber optics T1 facilities and ESF channel banks. Front panel switches allow easy set-up and configuration of the 7 groups of 8 outputs (56 total), and the Group 8 front panel output. The 8 groups may be independently set to different modes. The front panel output allows easy patching for special test needs. The low 1.75" vertical profile allows the TSI-1509A to be easily added to a crowded rack and provide outputs at the point of need. Fail contacts are available on a rear panel terminal block for status monitoring. The RS232C interface allows full remote operation and loading of the programmable data patterns.

FEATURES:
• 56 DSX-1 Rear Panel Outputs
• 7 Groups of 8 Outputs Independently Programmable
• 1 DSX-1 Front Panel Output
• SF/ESF/OFF Framing
• QRSS/3 in 24/1's/Two User Programmable Patterns/Thru Data
• AMI/B8ZS Coding
• Insert Rates of OFF/SINGLE/2x10-4/2x10-6/1x10-6/1x10-7
• Internal Oscillator or Clock Recovery from Reference DS-1 Input
• Use as DS-1 Timing Distribution Source

Additional specifications available upon request.