K-PO HR-2800 Owner's Manual - page 5
4)
Press the key once again to disable all systems.
ESP performance
of the modulation
in RX and TX modes
Modulation without ESP Modulation with ESP
16. MIC GAIN Control
This transceiver uses a high quality dynamic microphone. The microphone gain is adjustable with the MIC GAIN control. By turning
the knob clockwise, the microphone gain is increased.
17. Q.UP (Quick UP) Key
This key allows fast selection of the operating frequency upward. Each time this key is pressed, the frequency number moves up by
100 KHz steps.
18. PA/RFGAIN
Control
RF GAIN CONTROL
This transceiver uses a high sensitivity and selectivity receiver circuit. The receiver gain is adjustable with the RF GAIN control. By
turning the knob clockwise, the receiver gain is increased. It is convenient to reduce the receiver gain in case of very strong signals
from local stations and to increase it in case of weak signals or long distance communications.
PA CONTROL
The radio includes the PA (Public Address) function, in order to spread audio messages through an external speaker. To use the PA
function, connect an external speaker (optional) to the PA jack (24) located on the rear side of the radio. Turn the PA/SQL knob
completely counter clockwise to the PA position. The PA icon (Q) appears on the LCD display. Now it is possible to press the PTT
key (27) and speak into the microphone to spread your message through the external speaker. Adjust the microphone gain with the
MIC GAIN knob (16) to the desired level.
19. AS/SQL
Control
SQUELCH CONTROL (SQUELCH manual adjustment)
The SQUELCH control allows to silent the receiver by cutting the background noise, when no signals are received. Turn the knob
clockwise until the background noise is cut. Turn the knob counter clockwise (SQUELCH opening) in order to listen to the weakest
signals.
AS CONTROL (SQUELCH fixed setting)
The AS function allows to automatically silent the receiver, avoding the SQUELCH manual adjustment. A fixed SQUELCH threshold
is factory pre-set. To enable the fixed SQUELCH function, turn the knob fully counter clockwise to the AS position, until a click noise
is heard.
20. OFF/VOL (OFF /Volume) Control
This knob switches the radio ON and OFF and it adjusts the volume control. If no signals are being received on the operating
frequency, it is suggested to open the SQUELCH and adjust the volume to the desired level while listening to the background noise.
21. MICROPHONE
Connector
Connect the supplied dynamic microphone to this connector, locking it through the ring nut.
Rear Panel
22. ANTENNA
Connector
Antenna connector. Refer to the section INSTALLATION OF THE ANTENNA.
23. S-METER
Jack
Connect an external S-METER (optional) to this jack.