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d2:laser_servo

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d2:laser_servo [2021/12/16 23:58] – external edit 127.0.0.1d2:laser_servo [2021/12/17 01:58] (current) – external edit 127.0.0.1
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 {{ :d2:d-sub_power_pinout.jpg?nolink&150 |}} {{ :d2:d-sub_power_pinout.jpg?nolink&150 |}}
  
-**Absolute Jump TTL (BNC)** 
  
 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.  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. 
  
 +**Absolute Jump TTL (BNC)**
  
 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.
d2/laser_servo.txt · Last modified: 2021/12/17 01:58 by 127.0.0.1