Tendzone TYCHO T 1212/CA - Manual (Page 39)

the gain gradually increases or decreases; and vice versa.
- Gap threshold: level control when the audio (program) level is so low that it can be regarded as “intermittent”. when
the audio (program) level is lower than the level and the duration is at least the intermittence time, the intermittent
detection LED will light up and SPL will respond to the peripheral level. When the audio (program) level is higher than the
level, SPL will not be adjusted according to the peripheral level. In the case, the level must be set so that the LED can also
light up when the audio (program) signal is so weak that the microphone is unable to pick up enough program signal and
the signal picked up is almost the ambient noise. For the place where signal is too weak, the gap threshold can be
increased to eliminate those signals, for example, slight sound from music channel. If a audio (program) signal is
frequently intermittent (for example, the background music with visible intermittence), the threshold should be set lower
or slightly more than the background noise of the audio signal. Only in this way, the music and paging can be detected.
- Gap Time: control the time with which an audio signal can be regarded as “intermittent” (less than the intermittence
threshold), it shows in milliseconds. This setting can be used to compensate the reverberation time of the relatively
“active” room (reverberation time is too long), or in other words, to eliminate reverberation “tail” in paging broadcast or
audio signals. In general, the value is set to 100-200ms; for excessively “active” rooms, it is required to set it at 1S or
above.
- Gap Interval: if there is no intermittence in a program, the module will generate intermittence by temporarily muting
the audio signal.
- Gap Detection: intermittence detection LED. If intermittence is detected, the LED will light up and the module will
response to the pickup input.
- Forced Gap : immediately forced intermittence key. Press the button to temporarily mute the audio signal so that a
piece of intermittence and pickup can be generated.
- Reset All: clear these values. This feature can be used to monitor the noise level around the room.
- Calibration: force threshold value to the current level meter reading.
- Threshold: pickup threshold control. When the pickup input level is at the threshold, the module gain will not change.
For the calibration of the threshold, set it at the average of the ambient level in the room. The level meter provided can
show the RMS (root mean square) value of the input level currently picked up the for reference. A fader or input data can
be used to adjust the threshold and the calibration key can force the threshold to be set at the current level meter reading.
Theoretically, not show signal, it should be calibrated to the average of the ambient level.
- Gain Display: the window top shows the gain through the module (assuming there is no bypass).
- Minimum Value : the minimum ambient level after resetting that for a user to view.
- Maximum Value: the maximum ambient level after resetting that for a user to view.
- Peripheral Level : the initial background noise, including the echo of room audio.
2.7 Telephone control