Features
• Accepts IRIG-A, -B, and -G
• Wide Dynamic Performance
• Outputs Time to Recorders
• Active Status Monitoring
• Timing Resolution to 1 Microsecond
Introduction
The IRIG Time Code Translator/Reader module supports IRIG-A, IRIG-B, and IRIG-G translation and generation over a wide dynamic band of performance. The full-slot module implements time code-detection from 2 volts to 10 volts and carrier detection from 500 Hz to 10 MHz. Carrier modulation ratios are supported over a wide range as well with levels from 2:1 to a high of 6:1. The IRIG card also supports both the users’ need for high accuracy (1 microsecond) data-to-time reconstruction and reproduction of serial IRIG streams for highly accurate data and time reconstruction.
Also available for use are lines of GPS receivers that work in conjunction with the VTIM module. These enable an airborne IMUX and recorder to provide complete system timing.
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Inputs |
Sources |
Single |
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Data Impedance |
10,000 ohms |
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Signal Levels |
2 – 10V peak-to-peak |
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Input Codes |
IRIG-A (10,000 Hz) |
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IRIG-B (1,000 Hz) |
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IRIG-G (100,000 Hz) |
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Rates: ¼, ½, 1, 2, 4 |
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Input Modulation |
2:1 to 6:1 (3:1 typical) |
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Operating Range |
250 Hz to 400 KHz |
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Input Stability |
2% total drift and jitter |
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Processing |
Time Control |
Both real/decode and seed/generate |
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Generate |
Translate/generate through software-selectable |
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error correction counter |
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Outputs |
Sources |
Two |
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Signal Levels |
0-10V peak-to-peak, ±2.5V offset, software adjustable |
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(offset ±2.5V – software adjustable) |
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Output Codes (Source 1) |
IRIG-B (1,000 Hz) |
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Output Codes (Source 2) |
IRIG-A (10,000 Hz) |
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IRIG-B (1,000 Hz) |
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IRIG-G (100,000 Hz) |
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Rates: ¼, ½, 1, 2, 4 |
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Output Modulation |
3:1 |
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Operating Range |
250 Hz to 400 KHz |
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Output Stability |
.1% Total drift and jitter |
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Electrical & |
Form Factor |
6U (VME) single slot |
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Environmental |
Connectors |
D-subminiatures |
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Indicators |
In-sync, signal level, frame lock, time error |
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Operating Temperature |
32 °F - 158 °F (0 °C - 70 °C) |
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Storage Temperature |
14 °F – 185 °F (-10 °C – 85 °C) |
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Operating Altitude |
0 to 10,000 feet (0 – 3,100 meters) |
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Storage Altitude |
-1,000 to 20,000 feet (-300 to 6,200 meters) |
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Humidity |
20 –95% noncondensing |
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Ordering Codes |
VTIM-500 |
Time Code Translator/Reader |