Icom IC-9700 Instruction Manual basic - Page 38

Setting the Speech Compressor

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4 RECEIVING AND TRANSMITTING Setting the Speech Compressor SSB mode The Speech Compressor increases the average RF output power, improving readability at the receiving station. This function compresses the transmitter audio input to increase the average audio output level. LThe function is effective for long-distance communication, or when propagation conditions are poor. DDSetting before using the Speech Compressor function 1. Select the SSB mode. (Example: USB) 2. Push FUNCTION . ••Opens the FUNCTION screen. 3. Be sure the Speech Compressor is OFF. LIf it is ON, touch [COMP] to turn it OFF. DDUsing the Speech Compressor function 1. Touch the Multi-function meter again to display the COMP meter. 2. Push FUNCTION . ••Opens the FUNCTION screen. 3. Touch [COMP] to turn it ON. 4. Touch [COMP] for 1 second. 5. While speaking into the microphone at your normal voice level, adjust the Speech Compressor level to where the COMP meter reads within the COMP zone (10 to 20 dB range). LIf the COMP meter peaks exceed the COMP zone, your transmitted voice may be distorted. Speech Compressor is ON Rotate OFF 4. Push EXIT to close the FUNCTION screen. 5. Touch the Multi-function meter to display the ALC meter. LTouching the Multi-function meter sets the meter to Po, SWR, ALC, COMP, VD or ID. COMP zone 6. To close the COMP menu, push EXIT . ALC meter 6. Push MULTI to display the Multi-function menu. 7. Touch [MIC GAIN], and then adjust it by speaking into the microphone to where the ALC meter reads within the 30 to 50% range of the ALC zone. ALC zone 4-8

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4
RECEIVING AND TRANSMITTING
4-8
Setting the Speech Compressor
SSB mode
The Speech Compressor increases the average RF
output power, improving readability at the receiving
station. This function compresses the transmitter
audio input to increase the average audio output level.
L
The function is effective for long-distance communication,
or when propagation conditions are poor.
D
Setting before using the Speech
Compressor function
1.
Select the SSB mode.
(Example: USB)
2. Push
FUNCTION
.
• Opens the FUNCTION screen.
3.
Be sure the Speech Compressor is OFF.
L
If it is ON, touch [COMP] to turn it OFF.
OFF
4.
Push
EXIT
to close the FUNCTION screen.
5.
Touch the Multi-function meter to display the ALC
meter.
L
Touching the Multi-function meter sets the meter to
Po, SWR, ALC, COMP, V
D
or I
D
.
6. Push
MULTI
to display the Multi-function menu.
7.
Touch [MIC GAIN], and then adjust it by speaking
into the microphone to where the ALC meter
reads within the 30 to 50% range of the ALC zone.
COMP zone
Speech Compressor is ON
Rotate
D
Using the Speech Compressor function
1.
Touch the Multi-function meter again to display
the COMP meter.
2. Push
FUNCTION
.
• Opens the FUNCTION screen.
3.
Touch [COMP] to turn it ON.
4.
Touch [COMP] for 1 second.
5.
While speaking into the microphone at your
normal voice level, adjust the Speech Compressor
level to where the COMP meter reads within the
COMP zone (10 to 20 dB range).
L
If the COMP meter peaks exceed the COMP zone,
your transmitted voice may be distorted.
6.
To close the COMP menu, push
EXIT
.
ALC zone
ALC meter