Hardware
Lynx II DSA User's Manual – 7096089 115
Manual Ratio
The Gain Ratio can be manually entered when the Ratio Mode is set to Manual, or
automatically calculated by the Lynx II when the Ratio Mode is set to Automatic. The
Gain ratio value is interpreted by the stabilizer as the ratio to maintain between the two
windows (ratio = upper window / lower window). For instance, a value of 1.000 would be
appropriate for a pure Gaussian peak
Status
The Status is a read-only indicator that displays the current status reported by the Lynx
II’s stabilizer logic. The status will indicate “fault” when a stabilizer fault condition is
detected.
Correction value
The Correction value is a read-only parameter that reports the current level of correction
being applied to the system gain as a percentage of the allowed full scale.
Draw Stabilization Region
Selecting “On” will paint the two stabilization windows on the PHA spectrum display to
help the user fine-tune the proper location for the stabilization. This check box should be
disabled once the setup for stabilization has been completed.
Reset button
During the normal course of operation, if the stabilization algorithm attempts to set a
correction value that is beyond its allowable range (±10% for NaI range or ±1% for Ge
range), the Lynx II will assert an over/under-range fault. Additionally, the Lynx II will
switch the stabilizer mode from On to Hold.
Under normal temperature variations, the amount of gain compensation necessary to
maintain a stable storage location should be well within the allowed stabilization range.
An over/under-range fault may be an indication of faulty electronics and thus requires
operator intervention. The fault will remain asserted until (a) the operator acknowledges
the fault by pressing the Reset button, or the Stabilizer Mode is turned to Off.
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