Lambda SR1, Руководство по эксплуатации, Страница: 126 / 317

SR1 Operation Manual 126
© 2014 Stanford Research Systems
Post Filter Gain
For analog HiBw inputs, the TDD offers variable postfilter gain. Typically the Gain selection can be left on
"Auto" and SR1 will automatically optimize the postfilter gain. The level indicator above the gain
selection indicates the current level of the postfilter signal, blue for less than half scale, green for greater
than half scale, and red for overloaded. The AutoGain setting should keep the indicator in the "green"
range. If the level indicator jumps around too much, the gain can be set manually to a setting which
maintains the level in the green range.
Time Domain Detector and the Trigger
When the trigger is enabled for the TDD each measurement interval begins synchronously with the
receipt of a trigger. While the trigger is not necessary for most audio signals its use can improve the
stability of amplitude measurements when using burst or signals of a transient nature.