Yamaha TX4n, Reference Manual

Page: 28 / 60

TX6n/5n/4n Reference Manual
28
Panel Operations
■
Calibration
Here you can detect the impedance value of the speaker connected to each channel, and apply the result to the alert settings
(Signal Chain threshold values).
• The impedance and output level cannot be detected when the output level is lowered by the attenuator.
●
Calibrate by Pilot Tone
This performs the measurements using a pilot tone generated by the amp.
●
Calibrate by Prog Source
This performs the measurements by outputting an audio source (program source) other than the pilot tone.
Parameter name Range Explanation
Frequency Type 5 Hz & 20 kHz,
10 Hz & 20 kHz
Specifies the center frequency (5 Hz or 10 Hz) for the low-frequency
component of the pilot tone that is output to the speaker. The high-fre-
quency component is fixed at 20 kHz.
With the exception of Start and Apply, the parameters listed below are
displayed and edited separately for the high-frequency component
(High) and low-frequency component (Low).
Enable ON/OFF Turns pilot tone output on/off.
Calibration Start Start Starts detection of level and impedance.
Detected Lvl — Indicates the detected level.
Detected Imp — Indicates the detected impedance value.
Apply Apply Based on the detected level and impedance value, settings will be
made for the Output Signal Chain screen
(page 27) parameters Fre-
quency Type, Tone Level, Detect ImpMax (double the detected imped-
ance value), Detect ImpMin (half the detected impedance value), and
Detect TH (the detected level divided by
√
2).
Parameter name Range Explanation
Calibration Start Start Starts detection of impedance.
Detected Lvl — Indicates the detected impedance value.
Apply Apply Based on the detected impedance value, settings will be made for the
alert’s upper threshold value (double the detected impedance) and
lower threshold value (half the detected impedance).
NOTE