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d2:laser_servo [2021/03/02 17:06] – [Specifications] Michael Radunsky | d2:laser_servo [2021/12/16 23:58] – external edit 127.0.0.1 |
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**Absolute Jump TTL (BNC)** | **Absolute Jump TTL (BNC)** |
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| While it is infrequent, the D2-005 power supply may occasionally radiate noise from the side of its chassis onto nearby electronics. This only occurs in some system configurations, and will appear as a signal at the frequency of your mains electricity (typically either 50 Hz or 60 Hz). This noise can easily be removed by moving the D2-005 at least 18 inches (45cm) away from other electronics, rotating it 90° such that the sides of the D2-005 face away, or by moving the entire power supply to a different shelf. To accommodate this, all D2-005's are shipped with a 5' DB9 cable as of January 1, 2022. |
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When asserted HIGH (5V) while in LOCK mode, ABSOLUTE JUMP takes the Laser Servo out of lock and conveys <color black/yellow>the negative</color> of the voltage on LASER JUMP AMPLITUDE to the SERVO OUTPUT. Thus, a 1 V input to LASER JUMP AMPLITUDE applies -1 V to SERVO OUTPUT. ABSOLUTE JUMP is useful when one wants to control the voltage on the integration stages of the loop filter, or for zeroing the integrators during auto-locking routines. When returned to LOW (0V), the loop filter is reengaged. Engaging or disengaging the ABSOLUTE JUMP is achieved in under 400 μs. | When asserted HIGH (5V) while in LOCK mode, ABSOLUTE JUMP takes the Laser Servo out of lock and conveys <color black/yellow>the negative</color> of the voltage on LASER JUMP AMPLITUDE to the SERVO OUTPUT. Thus, a 1 V input to LASER JUMP AMPLITUDE applies -1 V to SERVO OUTPUT. ABSOLUTE JUMP is useful when one wants to control the voltage on the integration stages of the loop filter, or for zeroing the integrators during auto-locking routines. When returned to LOW (0V), the loop filter is reengaged. Engaging or disengaging the ABSOLUTE JUMP is achieved in under 400 μs. |