Yaesu FT-890 Operating Manual page 3

The meter indicates the selected
parameter during transmission,
and signal strength in S-units dur-
ing reception (on the top scale).
Each S-unit is approximately 6
dB. See the back of this page.
I
One of these indicatorlbuttons is al-
I
1
ways lit to indicate the function of the
multimeter during transmission.
Press an indicator to change the se-
lection. The meanings of the abbre-
viations are as follows:
ALC relative Automatic Level
Control
PO RF Power Output (watts)
S W R Standina Wave Ratio
This button can be used to manually
activate the transmitter. It must be in
the undepressed (I) position for re-
ception.
transmitter switching in voice modes.
Related controls are on the rear
panel, and operation is described on
page 19.
This button turns the transceiver on
and off. To avoid switching spikes,
make sure it is off when you turn the
DC power source (AC power supply)
on or off. In a mobile installation, the
transceiver should be off when start-
ing or stopping the engine.
This '/&inch, 3-contact jack accepts
either monaural or stereo head-
phones with a 2- or 3-contact plug.
When a plug is inserted, the loud-
speaker is disabled. Audio is sup-
plied to both channels of a stereo
headphone.
This 8-pin jack accepts the
MD-1
B8
or M D - ~ C E Desktop
Microphone or the MH-188
Handie Scanning Micro-
phone. Proper microphone
input impedance is 500 to
600 ohms.
M I C
I
4 r
This button activates split frequency trans-
ceive operation. The displayed frequency
is used for reception, and the other VFO or
rear half of the memory for transmission.
The SPLIT indicator at the left side of the
display is lit while this function is active.
The TX LED glows red
when the transmitter is
activated. The BUSY
LED glows green when
number and special states. Details
are on the back of this page.
These five momentary buttons
select the operating mode, indi-
cated by the LED in each button.
Each of these buttons has an LED indica-
tor to show when the function is activated.
PROC activates the speech processor in
the SSB and AM modes. See page 18.
AGC-F sets the receiver Automatic Gain
Control decay time for fast recovery, which
can improve CW reception and fast-fading
(QSB) SSB signals.
IPO bypasses the receiver RF amplifier,
providing the widest dynamic range. See
page 14 for details.
ATT If the IPO function is on and the band
is noisy or very strong signals are present,
press this button to insert a 12-dB attenu-
ator in the front end to protect the receiver
from overload.
RPT activates HF FM repeater operation
on the 29-MHz band. See page 21.
The inner AF gain control adjusts
the volume of the receiver in the
speaker or headphones.
The outer RF gain control adjusts
the gain of the receiver IF amplifi-
ers. This control is normally set fully
clockwise for maximum sensitivity.
See page 15 for details.
The inner MIC control adjusts the mi-
crophone input level for SSB and AM
transmission.
The outer RF PWR control sets trans-
mitter output power in all modes. The
adjustment range is from less than 10
to 100 watt3 (5 to 25 watts AM).