Status LEDs
TSync Time Code Processor cards include three LEDs that provide visual status information. See table LED Colors below for these indicator codes.
The LEDs operate in certain modes by default, but each LED can be programmed independently to display any mode, including a manual mode. In manual mode, the LEDs are user-configurable to ON, OFF, or BLINK. For additional information, see the TSync Factory Driver Guide, Section 4.2.8.25 (http://spectracom.com/support/product-manuals-software).
LED colors
| LED Color | Function | Meaning |
|---|---|---|
| green | SYNC | Unit is synchronized: A valid external time or 1PPS reference is present, disciplining the onboard oscillator. |
| yellow | HOLDOVER | Unit is in holdover: No valid external reference is present. The onboard oscillator is not disciplined by an external reference, but continues to provide time/frequency for the duration of the user-set holdover time (default = 7200 seconds [= 2 hours]). |
| red | ALARM | The unit does not provide a time or frequency signal. |
During the states power-on, self-test, wait-for-host, and download-from-host, modes are directly allocated to the LEDs, as listed below.
During normal operation, the LEDs can indicate any operational mode, as programmed by the user.
The Fault state is indicated by the blinking code. It blinks the number of times indicated below, with a 2-second pause between each set.
Fault codes
| No. of Blinks | Meaning |
|---|---|
| 1 | FPGA programming error |
| 2 | Failure to decompress |
| 3 | CRC failure writing to flash |
| 4 | Self-test failure |
| 5 | Timing system failure |