Yaesu FT DX 9000MP CONTEST - DATA MANAGEMENT OPERATION, Operation Manual

Page: 83 / 180

Page 81 FT
DX
9000MP O
PERATION
M
ANUAL
In traditional AGC systems, the audio output from the transceiver becomes essentially fixed once the threshold for
AGC action is reached (usually several dozen dB above the no-signal noise floor). The
FT
DX
9000MP , however,
includes an innovative Sloped AGC system, that allows the audio volume to rise and fall slightly according to signal
strength. Although the rise/fall are not dramatic, they are sufficient to allow you to use your ear to discern and
separate signals according to signal strength, not just audio frequency.
SLOPED AGC Operation
TTTTT
OOLS OOLS
OOLS OOLS OOLS
FOR FOR
FOR FOR FOR
C C C C C
OMFOR OMFOR
OMFOR OMFOR OMFORTTTTTABLE
ABLE
ABLE ABLE ABLE
AND AND
AND AND AND
E E E E E
FFECTIVE FFECTIVE
FFECTIVE FFECTIVE FFECTIVE
R R R R R
ECEPTION ECEPTION
ECEPTION ECEPTION ECEPTION
NORMAL
Input Signal
A
u
d
io
O
u
tp
u
t
SLOPE
AGC
(
A
UTOMATIC
G
AIN
C
ONTROL
)
[MAIN Tuning Dial] Knob
[MNU] Key
[CLAR/VFO-B] Knob
VDD TEMP SWR BIAS
Using Sloped AGC
1. Press the [ MNU
] (Menu) key momentarily to enter
the Menu mode; the Menu will appear on the LCD
display.
2. Use the [ Main Tuning Dial
] knob to select Menu
Item “
RX AUDIO 083 AGC-SLOPE
”.
3. Rotate the [
CLAR/VFO-B
] knob to change the set-
ting to “SLOPE.”
4. Press and hold in the [ MNU
] key for two seconds
to save the new setting and exit to normal opera-
tion. You wil now be using the Sloped AGC sys-
tem.