101
Z31980_00_03
Configuration
Moving Average:
This is a moving average of lock monitor signal. The range is from 1 to 1000. There is no
default as this value is set by EDLOCK. A value of 1 represents a bandwidth o 1000 Hz,
and . A value of 1000 represents a bandwidth of 1 Hz.
i
Note that this is used only for the display of the lock monitor and not for the regulation.
The regulation bandwidth is only affected by the P & I gains.
Phase angle:
This is the Phase correction for the real and imaginary part of the lock signal. The Lock
Level display in the front end TopSpin displays only the real part of the signal. The imag-
inary part is used to regulate the field. There is no default as this value is set by
EDLOCK.
Phase Correction:
In order to be able to lock, the real part needs to be maximum and positive and the imag-
inary needs to be close to zero. Pressing this button automatically calculates the phase
required for this condition.
Start / Update:
Starts the pulse programmers and sets all parameters to the hardware. This is the
OPERATE mode, which generates lock signal, but not yet close the control loop.
Stop:
This stops the pulse programmer and date collection. The lock is now in STANDBY
mode and no RF Pulses are generated.
Auto Range:
In case of magnet drift, when the fine DAC gets to below 500 or above 3500, the coarse
DAC is incremented or decremented by one step, to bring the fine DAC back nearer the
center of its operating region. Default: ON
P-Control ON:
Enables the proportional part of the control loop (-> Operate +P). The fine DAC value will
be the proportional gain times the difference between the imaginary part of the signal
and zero.
To Next Page
Loading...
