Imagine ADC-A12C31, Инструкция по установке и эксплуатации

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ADC-A12C31 Operator’s Handbook Rev. A P. 8
Introduction
The ADC-A12C31 is a precision analog clock containing a stepper motor drive and advanced
microprocessor controlled electronics.
IRIG-B
Defined by the Range Commanders Council, U.S. Army White Sands Missile Range. IRIG (Inter-range
Instrumentation Group) is used by military, government, power industry and many other commercial
and industrial applications. The ADC-A12C31 decodes IRIG-B in both a 1 kHz modulated (IRIG-B1) and
un-modulated/pulse width coded/DC level shifted (IRIG-B0) format. All formats of IRIG-B time code
decoded by the ADC-A12C31 use the time of year information BCD (Binary Coded Decimal). All
formats of IRIG-B time code decoded by the ADC-A12C31 also use the extended year/date and time
zone information in the control functions as defined by the IEEE 1344 specification. SBS (Straight
Binary Seconds) information is not decoded. Manchester format/encoding is not supported.
The ADC-A12C31 can be configured for world-wide time zone offset and automatic DST
(Daylight Saving Time) adjustment and allows for reliable, accurate and maintenance free
operation. Use of the automatic DST feature requires that the clock be enabled to accept the
time code date encoding, using the USB port and ADC-Set (Clock Time Code Display) USB
Configuration Utility (i.e. Windows software application). The time code reference must
provide date encoding in the control bits/fields to date encoding standard for SMPTE or the
IEEE-1344 year encoding for IRIG-B.
SMPTE
Society of Motion Picture and Television Engineers format is available in frame rates of 24, 25, and
30 frames second. The ADC-A12C31 time code clock supports all three formats.
All formats of
SMPTE time code decoded by the ADC-A12C31 use the full date information in the user bits as
defined by the standard.
The ADC-A12C31 does not support decoding of SMPTE drop-frame, reverse running, VITC,
NTSC, color frame, blackburst or other video time code formats and synchronization options.
Please refer to the “Specifications” section of this document for additional details.
Features

RTC (Real Time Clock) backup retains time during loss of power or reference.

Self-correcting hands once power and/or Time Code reference is established.

Time zone offsets

DST configuration.

TCXO (Temperature Compensated Crystal Oscillator) for +/- 1 min per year accuracy when
no reference available (freewheeling).

All configuration settings retained in non-volatile flash memory.

Second Hand with sweep or step option.

Self-correcting hands after loss of power and/or time code reference and DST changes.

Loss of LTC status LED on clock face, located at the 6 o’clock position.