Serial High Density Digital Recording Using a Wideband Analog IRIG Recorder/Reproducer.

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Abstract:

This report describes the results of a study that was conducted to determine the performance characteristics of several pulse code modulation codes for serial high density digital recording using wideband analog recorderreproducers. The major conclusions are 1 The standard Inter-Range Instrumentation Group IRIG conditions for analog recording with bias are also nearly optimum for serial high density digital recording HDDR with bias when a wideband IRIG recorderreproducer is used 2 The best codes for serial HDDR when wideband IRIG analog recorderreproducers are used are BIPhi-L and RNRZ-L. The maximum reliable bit packing density for BIPhi-L is 15 kbin. The maximum reliable bit packing density for RNRZ-L is 25 kbin. The minimum reliable reproduce bit rate for RNRZ-L is 200 kbs. Fifteen appears to be a good choice of shift register length for the RNRZ-L randomizer and 3 Bit error rates of 0.000001 or better are easily achieved when good quality wideband instrumentation tape, 50-mil track widths, and the maximum recommended bit packing densities are used. The 1980 edition of the Telemetry Standards Range Commanders Council IRIG Document 106-80 included Serial HDDR Standards based on these conditions. Author

Author(s):
Law, E. L.
Author Organization(s):
PACIFIC MISSILE TEST CENTER POINT MUGU CA
Descriptive Note:
Technical publication,
Pagination:
0072

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
PMTC-TP-81-20
Task Number(s):
W06040000
Project Number(s):
W0604
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*Magnetic recording systems, *Recording systems, *Digital systems, *Guided missile ranges, *Magnetic tape, Packing density, Analog systems, Shift registers, Pulse code modulation, Telemeter systems, Military commanders, Range(Distance), Instrumentation, Standards, Broadband, Coding, Quality, Reproduction, Length, Tapes
Field(s)/Group(s):
Recording and Playback Devices, Guided Missile Launching and Basing Support, Electricity and Magnetism
Keyword(s):
Clock slips, Error bursts, HDDR(High Density Digital Recording), Tape dropouts, IRIG(Interrange Instrumentation Group), Biphase levels, NRZ(Nonreturn to Zero), BER(Bit Error Rates), Miller codes, LPN A6306302 054D 8W06040000, PE64208N, WUA6302D02, S L change 8625
Report Date:
1981 May 01