Hold/Mute, Arrow Keys, Resume | Fisher XLT-30 specification

CONTROL PANEL

(The following filter modes have a frequency range from 60 Hz to 2.4 kHz)

HI (High Range) – This filtering mode allows the user to adjust the response in the higher areas of the frequency range. Use the Arrow keys to increase or decrease this frequency response range.

LO (Low Range) – Similar to the previous filter mode, the Low Pass filter allows the user to listen to the lower areas of the frequency range. The Arrow keys are used to increase or decrease this frequency response range.

FC (Frequency Choice) – This filter could also be called Frequency Select. This mode allows tuning to the frequency that gives the user the best response. The Arrow keys are used to move the cursor, selecting a narrow frequency band of choice

HOLD/MUTE

This dual purpose button is both a Mute control and a Peak Hold Reset control.

Mute – As the name applies, muting disengages the sound to the user. There is also a control on all listening microphones. Learn to use this control to prevent excessive noise to your ears when the probes are moved.

Hold – The display of the XLT-30 will show the highest sound level recorded. This reading can be reset by depressing this pad. Resetting the Peak Hold clears earlier readings of the Peak sound.

Arrow Keys

These keys allow features of the XLT-30 to be modified.

RESUME

After any modification has been made to the XLT-30 (VOLUME, NOTCH, or FILTER), depressing the RESUME will return the display screen back to a Meter function (Sound Graph).