Kenwood TS-890S Operation Manual - Page 59

Press F3 [AGC] or [AGC] to select FAST, MID or

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COMMUNICATING AIDS 5 Switching the AGC Time Constant 1 Select a mode other than FM. 2 Press [AGC] to select an AGC time constant. Pressing [AGC] each time switches the selection in the following sequence: "AGC-F" → "AGC-M" → "AGC-S". Adjusting the AGC Time Constant Preset Value 1 Press and hold [AGC] to display the AGC configuration screen. AGC OFF Turns off AGC according to the status of the signals received. RF gain is fixed when AGC is set to OFF, which makes it easier to hear weak signals in some cases. ● If AGC is turned OFF while the S meter is deflecting due to the signal, sound may be output to the speaker or headphones at an unexpectedly loud volume. Turn the [RF] control to turn down the RF gain level in advance. After turning off AGC, adjust RF gain by turning the [RF] control until the signal can be heard clearly. To turn off AGC, perform the steps below. 1 Press and hold [AGC] to display the AGC configuration screen. 2 Press and hold F6 [(OFF)] to configure AGC to OFF. > lights up and the preset value display area is grayed out. 3 Press and hold [AGC] or press [ESC] to end the process. . .. 2 Press F3 [AGC] or [AGC] to select "FAST", "MID" or "SLOW". 3 Press F4 [-]/ F5 [+] or turn the [MULTI/CH] control to change the AGC time constant. Setting Value 1 to 20 The AGC time constant is fastest when it is configured to "1", and slowest when configured to "20". • The default AGC time constant values in the respective operation modes are as follows. Mode SSB SSB-DATA CW FSK PSK AM AM-DATA FAST MID 9 12 9 12 9 12 7 11 7 11 9 13 9 13 SLOW 14 14 14 14 14 16 16 4 Press and hold [AGC] or press [ESC] to end the process. AGC Quick Recovery This function performs recovery from the suppression that occurs when the RX signal contains pulse noise. 1 Press and hold [AGC] to display the AGC configuration screen. 2 Press F2 [PULSE] to display the AGC Quick Recovery configuration screen. 3 Press F3 [ON/OFF] to set the function to "On". 4 Press F4 [-]/ F5 [+] or turn the [MULTI/CH] control to change the threshold level. Configuring to a larger value activates this function when signal level difference between the RX signal and pulse noise is small. Setting Value 1 to 5 (default) to 10 ● This function may not be effective for pulse noise occurring in short time interval. ● Configuring to a value with a high threshold level may cause the transceiver to malfunction and distort the RX audio depending on the condition of the RX signal. 5 Press and hold [AGC] or press [ESC] to end the process. 5-3

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Switching the AGC Time Constant
1
Select a mode other than FM.
2
Press [AGC] to select an AGC time constant.
Pressing
[AGC]
each time switches the selection in the
following sequence: “AGC-F” → “AGC-M” → “AGC-S”.
Adjusting the AGC Time Constant Preset Value
1
Press and hold [AGC] to display the AGC
configuration screen.
2
Press F3 [AGC] or [AGC] to select “FAST”, “MID” or
“SLOW”.
3
Press F4 [–]/ F5 [+] or turn the [MULTI/CH] control
to change the AGC time constant.
Setting Value
1 to 20
The AGC time constant is fastest when it is configured to “1”,
and slowest when configured to “20”.
•
The default AGC time constant values in the respective
operation modes are as follows.
Mode
FAST
MID
SLOW
SSB
9
12
14
SSB-DATA
9
12
14
CW
9
12
14
FSK
7
11
14
PSK
7
11
14
AM
9
13
16
AM-DATA
9
13
16
4
Press and hold [AGC] or press [ESC] to end the
process.
AGC OFF
Turns off AGC according to the status of the signals received. RF
gain is fixed when AGC is set to OFF, which makes it easier to hear
weak signals in some cases.
●
If AGC is turned OFF while the S meter is deflecting due
to the signal, sound may be output to the speaker or
headphones at an unexpectedly loud volume.
Turn the
[RF]
control to turn down the RF gain level in advance.
After turning off AGC, adjust RF gain by turning the
[RF]
control
until the signal can be heard clearly.
To turn off AGC, perform the steps below.
1
Press and hold [AGC] to display the AGC
configuration screen.
2
Press and hold F6 [(OFF)] to configure AGC to OFF.
<<
>> lights up and the preset value display area is
grayed out.
3
Press and hold [AGC] or press [ESC] to end the
process.
AGC Quick Recovery
This function performs recovery from the suppression that occurs
when the RX signal contains pulse noise.
1
Press and hold [AGC] to display the AGC
configuration screen.
2
Press F2 [PULSE] to display the AGC Quick
Recovery configuration screen.
3
Press F3 [ON/OFF] to set the function to “On”.
4
Press F4 [–]/ F5 [+] or turn the [MULTI/CH] control
to change the threshold level.
Configuring to a larger value activates this function when signal
level difference between the RX signal and pulse noise is small.
Setting Value
1 to 5 (default) to 10
●
This function may not be effective for pulse noise
occurring in short time interval.
●
Configuring to a value with a high threshold level may
cause the transceiver to malfunction and distort the RX
audio depending on the condition of the RX signal.
5
Press and hold [AGC] or press [ESC] to end the
process.
COMMUNICATING AIDS
5
5-3