Transmitter Operation - Kenwood TS-790A Instruction Manual

4-3. TRANSMITTER OPERATION
The MAIN channel is used for transmission. The SUB
channel is ready for reception even while transmitting
on the MAIN channel (unless ''OFF"' is indicated in
the SUB display).
You can utilize this feature for communication via
satellite or for full duplex operations. The system will
function as an ordinary transceiver when you do not
use the SUB channel.
4-3-1, Precaution
Before transmitting check the frequency for activity
so that you do not interrupt another QSO.
POWER switch
PROC switch
Microphone RF PWR contro!
MIC gain
control
\
\
ALC/RF switch
1. Set the switches and controls as follows:
Power switch : OFF ( EB)
PROC switch : OFF (#1)
ALC/RF switch : ALC (= }
MIC control : Fully counterclockwise
RF PWR control : Fully clockwise
2. Connect a microphone to the MIC jack.
4-3-2. FM Mode
1. Place the POWER switch ON.
2. Press the FM mode key.
3. Enter the desired frequency (Shown in the MAIN
display).
4. Press the microphone PTT switch. The ON AIR in-
dicator will light.
5. Speak into the microphone, holding the microphone
about 5cm away from your mouth. Close talking
or talking too loudly ray reduce transmission clar-
ity or spread the side bands too much.
6. Release the PTT switch. The ON AIR indicator wilt
turn OFF.
32
4-3-3. SSB (LSB, USB) Mode
1. Place the POWER switch ON.
2. Press the LSB or USB mode key.
3. Enter the desired frequency (Shown in the MAIN
display).
4. Press the microphone PTT switch. The ON AIR in-
dicator will light.
5. Speak into the microphone and adjust the MIC gain
control so that the meter deflection does not ex-
ceed the ALC zone on voice peaks.
Note: —_—______——_-- $$
Adjustment using the ALC meter provides greater ac-
curacy than if you try and use the power meter for
adjustment. Never adjust for ALC deflection above the
ALC zone, as this will cause distortion of the trans-
mitted audio signal.
MIC —2— AF PWR
ALC ZONE
q
6. Turn on the PROC switch if required. (Please refer
to Section 4-3-5)
7. Release the PTT switch. The ON AIR indicator will
turn OFF.
4-3-4. CW Mode
Sidetone oscillator
The transceiver contains a sidetone oscillator circuit
to permit you to monitor your own signal. If the key
is closed in a mode other than CW, transmit will not
be selected but sidetone will come out of the speak-
er, to allow Morse code training. The volume of the
sidetone can be adjusted internally. (Please refer to
Section 6-6-4)
Semi-automatic break-in
Depressing the CW key will automatically place the
transceiver into the transmit mode. Transmit will be
maintained for a period determined by the setting of
the CW DELAY control on the rear panel of the trans-
ceiver, even after the CW key is released.
cw
DELAY
©
The further you turn the control clockwise, the more
time it will take until receive is restored.