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h. Just above the “LO” lettering on the bottom of the DT454, locate small
hole in the aluminum enclosure. Behind this hole is a potentiometer
that calibrates the meter sensitivity for the LO setting.
i. Using a small screwdriver (1/16”) adjust the LO METER potentiometer
so the 3
rd
LED is illuminated
b. WHILE RECORDING:
a. Set the AGC Disable switch to the NOISE setting.
b. Set PAN TO L / NORM switch to the PAN TO L position (Since AGC
Disable is being used)
c. Use the LO meter setting, and adjust the GAIN and TRIM (volume
potentiometer) settings to keep the peaks below the red LED of the
Meter.
d. The other settings (phantom power, etc) operate like any typical mixer.
c. POST PRODUCTION
a. Refer to the section “Post Production – Removing Right Track” to
remove the AGC Disable noise signal from the right recording track, to
leave you with the clean recorded left track.
The AGC Disable technique yields very good results, and is a vast improvement
beyond the camera’s standard noisy performance. However, you should know
that it will not be quite as good as a camera which already has manual gain
control.
On our website, you will find videos demonstrating the performance improvement
of the AGC Disable technique.
Special note regarding Canon Cameras and Noise AGC Disable:
1. The microphone input on the camera does not get activated until the camera
begins to RECORD for the first time.
2. Until you hit RECORD and activate the microphone input, you will hear noise
in the DT454 headphones. Once you hit RECORD, the noise in the
headphones goes away, and doesn’t return until the camera power gets
cycled.
3. After the camera power gets cycled, you will need to hit RECORD again to
eliminate the noise in the headphones.
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