Yaesu FT-2000 Operating Manual page 21

F
RONT
IPO I P
This button may be used to set the optimum front end
characteristics of the receiver circuit for a very strong-
signal environment. Available selections are AMP 1
(low distortion amplifier), AMP 2 (2-stage low-distor-
tion RF amplifier), or ON (bypasses the front end RF
amplifier), and the selected receiver RF amplifier ap-
pears at the IPO column of the Receiver Configuration
Indicator in the display.
A :
The IPO switch affects both the Main (VFO-A) and
Sub (VFO-B) receivers.
R.FLT Switch
This button selects the bandwidth for the Main Band
(VFO-A) receiver's first IF Roofing Filter. Available
selections are 3 kHz, 6 kHz, 15 kHz, or Auto, and the
selected bandwidth appears in the FLT column of the
Receiver Configuration Indicator on the display.
A :
The Roofing Filter selection applies to the Main
band (VFO-A) only.
Because the roofing filter is in the first IF, the pro-
tection it provides against interference is quite sig-
nificant. When set to AUTO, the SSB bandwidth is
6 kHz, while CW is 3 kHz and FM/RTTY are 15
kHz. On a crowded SSB band, however, you may
wish to select the 3 kHz filter, for the maximum
possible interference rejection.
AGC Switch
This button selects the AGC characteristics for the re-
ceiver. Available selections are FAST, MID, SLOW,
or AUTO, and the "AGC" icon will change according
to the AGC characteristics selected.
Press the [ AGC ] button repeatedly to select the de-
sired receiver-recovery time constant. Press and hold
in the [ AGC ] button for two seconds to disable the
AGC (for testing or weak-signal reception).
When the [ AGC ] button is pressed independently, it
applies to the Main band (VFO-A) receiver.
When you press the [ B ] button, followed by the [ AGC ]
button (within five seconds of pressing the [ B ] switch),
it affects the Sub band (VFO-B) receiver.
A :
If the AGC receiver-recovery time is set to "Off" by
pressing and holding in the [ AGC ] button, the S-meter
will no longer deflect. Additionally, you will likely en-
counter distortion on stronger signals, as the IF ampli-
fiers and the following stages are probably being over-
loaded.
FT-2000D O
P
ANEL
O Switch
M
C
ONTROLS
NB Switch
This button turns the IF Noise Blanker on and off.
Press this button momentarily to reduce a short-dura-
tion pulse noise; the "
play.
Press and hold in this button for one second to reduce
a longer-duration man-made pulse noise; the "
icon will blink for three seconds, then will appear con-
tinuously in the display.
Press this button again to disable the noise blanker;
the " " icon will disappear.
A :
When you press (or press and hold) the [ NB ] button
momentarily, it affects the Main band (VFO-A) re-
ceiver. When you press the [ B ] button, then press (or
press and hold in) the [ NB ] button (within five sec-
onds of pressing the [ B ] button), it affects the Sub band
(VFO-B) receiver.
METER Switch
This control switch determines the function of the meter
during transmission.
: Indicates the speech compressor level (SSB
mode only).
: Indicates the relative ALC voltage.
: Indicates the power output level.
: Indicates the Standing Wave Ratio (Forward:
Reflected).
: Indicates the final amplifier drain current.
: Indicates the final amplifier drain voltage.
MONI PROC Knobs
MONI Knob
The inner [ MONI ] knob adjust the audio level of the
transmit RF monitor during transmission (relative to
the AF GAIN control), when activated by the [ MONI ]
button.
PROC Knob
The outer [ PROC ] knob sets the compression (input)
level of the transmitter RF Speech Processor in the SSB
and AM modes, when activated by the [ PROC ] but-
ton.
BK-IN Switch
This button turns the CW break-in capability on and
off. While the CW break-in is activated, the "
icon appears in the display.
SPOT Switch
This button turns on the CW receiver spotting tone; by
matching the SPOT tone to that of the incoming CW
signal (precisely the same pitch), you will be "zero
beating" your transmitted signal on to the frequency of
the other station.
The Sub (VFO-B) frequency display will indicate the
offset tone frequency when this button is pressed.
& S
WITCHES
" icon will appear in the dis-
Page 19
"
"