AOR AR5001D - High Pass Filter; DE Emphasis

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11-4-2 HF (HIGH PASS FILTER)
The audio high pass filter limits the audio base response improving intelligibility in certain circumstances.
There are three available selections for cut off frequencies: 0.3 kHz, 0.6 kHz, and THRU.
The high pass filter is automatically selected according to the IF bandwidth.
Conditio ns
Cut off
frequency
IF bandwidth: 0.5
k
Hz
~ 15
k
Hz
0.3
k
Hz
IF bandwidth: More than 30
k
Hz
THRU
AM, LSB, USB modes
THRU
To select high pass filter c ut off frequency, perform the fo llowing steps:
1. Press the [ FUNC ] key, and then press the [ MODE ] key.
2. Press the [ DOWN ] key to select “A-HPF” in reverse format.
3. Rotate the sub dial to select the desired cut off frequency.
4. Press the [ MHz ] key to accept the entry and return to a standard display.
Alternatively, press the [ CLR ] key to abort entry.
11-4-3 DE-EMPHASIS
The audio de-emphasis is only applicable to WFM mode and affects the sharpness of recovered audio.
The value of de-emphasis varies from country to country.
There are two available selections for audio de-emphasis of value: 50 uS, and 75 uS.
To select audio de-emphasis value, perform the following steps:
1. Press the [ FUNC ] key, and then press the [ MODE ] key.
2. Press the [ DOWN ] key twice to select “W. FM DE. EMP” in reverse format.
3. Rotate the sub dial to select the desired de-emphasis value.
4. Press the [ MHz ] key to accept the entry and return to a standard display.
Alternatively, press the [ CLR ] key to abort entry.