PRESIDENT JFK II A+ Manual Del Usuario página 8

the RF GAIN in order to avoid distortion when your correspondent
is close by and when he has no RF POWER.
The normal setting of this function is on maximum (fully clockwise).
4) RF POWER
Nonfunctional on the JFK II A+ model.
5) CHANNEL SELECTOR: rotary knob and UP/DN keys on the
microphone
These switches allow increasing or decreasing a channel. A «beep»
sounds each time the channel changes if the Beep function is
activated. See BEEP function page 10.
6) DISPLAY
It shows all functions:
The BARGRAPH shows the reception level, the output power level
or SWR level.
7) SWR ~ M5
SWR
Allows changing the function of the meter. By pressing the SWR key
(7) you alternate between SWR and S/RF.
SWR: shows the SWR value on the display (scale from 1 to 3)
S/RF: shows the output and reception power on the S/RF-meter.
M5
Nonfunctional on the JFK II A+ model.
8) CH 19/9 ~ FRQ ~ M4
Nonfunctional on the JFK II A+ model.
9) MODE SELECTOR AM/FM ~ PA ~ M1
AM/FM
(short press)
Press AM/FM key (9) allows select AM or FM modulation. Your modu-
lation mode has to correspond to the one of your correspondent.
Amplitude modulation/AM: is for communications in areas where
there are obstacles and over medium distances.
Frequency modulation/FM: for nearby communications in flat, open
field.
PA (Public Address)
(long press)
An external sound loudspeaker can be connected on the PRESI-
DENT JFK II A+ ASC by a jack located on the rear panel PA.SP (D).
A long press allows alternate between Public Address and radio
mode. In PA mode, «PA» appears on the display; the message sent
in the microphone will be transferred to the external loudspeaker
and amplified. Keep the microphone at a sufficient distance from
this loudspeaker in order to avoid the Larsen effect.
The PA volume is adjustable by the MIC GAIN button. Visual display
of the level on the bargraph.
M1
Nonfunctional on the JFK II A+ model.
10) ROGER ~ M2
ROGER
(short press)
The icon « » appears on the display when the function is active. The
ROGER BEEP sounds when the PTT (17) switch of the microphone is
released in order to let your correspondent speak. Historically as radio
is a «simplex» communication mode, it is not possible to speak and
to listen at the same time (as it is the case with a telephone). Once
someone had finished talking, he said "Roger" in order to prevent
his correspondent that it was his turn to talk. The word "Roger" has
been replaced by a significant beep. There comes "Roger beep"
from.
Note: the ROGER BEEP also sounds in the loudspeaker if the BEEP
function is active. If the BEEP function is not active, only the cor-
respondent can hear the ROGER BEEP.
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