Kenwood TM-3530A - Manual (Page 15)

4-2. RECEPTION
After power and antenna connections have been com­
pleted, set the controls and switches as follows:
©Turn the POWER/VOL control, clockwise, to turn on
power. The indicators on the display will light to
show the transceiver is operating.
The indicators normally work about 0.5 seconds after
the power switch is turned on. [When the power
switch is initially turned on, 4.000 (0.000 with the
TM-3530A) will be displayed.]
® As the POWER/VOL control is turned clockwise,
either background noise or a QSO will be heard.
© To eliminate the no-signal noise, use the SQL control.
For SQL control operation, refer to the following ex­
planation.
© Enter the desired frequency using the numeric keypad.
4-3. TRANSMISSION
4-3-1. Precautions:
© T h e TM-3530A/2570A/2550A/2550E/2530A an­
tenna impedance is 50 ohms. Be sure to use only an
antenna of 50 ohms impedance.
© Check the intended transmit frequency before operat­
ing to prevent interference with other stations.
© Pressing the PTT switch places the transceiver in
transmit mode; the ON AIR indicator will light and the
LED bar meter will show the relative transmitter
power. Recommended talk distance to the micro­
phone is approximately 5 cm.
To transmit, first select the desired frequency and see
whether it is busy or not. If it is not busy, simply depress
the PTT switch and speak into the microphone. The ON
AIR indicator will light.
HI/LOW switch
Local QSO's can be enjoyed with less interference to
others, and with less power consumption, by reducing
the RF output power.
The relationship between the HI/LOW switch positions
and the actual output power is as follows.
TM-2570A
TM-2550A/2550E
TM-3530A/2530A
HI
LOW
HI
LOW
HI
LOW
70W/approx. 16 A
Approx. 5W/approx. 3A
45 W/approx. 9.5 A
Approx. 5 W/approx. 3 A
25 W/approx. 6.5 A
Approx. 5 W/approx. 2.5 A
At LOW power, the power indication will drop to approxi­
mately "4 - 6" on the meter, and the microphone modu­
lation check function operates.
4-4. MEMORY
4-4-1. Microprocessor memory back-up
A lithium battery is contained in the transceiver to retain
memory. Turning off the POWER switch, disconnecting
the power cable, or a power failure will not erase the
memory. The battery should last for approximately five
years. When the battery discharges, an erroneous dis­
play may appear in the display. (For the lithium battery
replacement, refer to section 5-4 on page 33.)
Notes:
1. When the lithium battery is replaced, the micropro­
cessor must be reset, using the procedure in section
4-4-2.
2. When the lithium battery fails, the radio's microcoded
functions are NOT affected. Only information stored
in memory will be cleared.
4-4-2. Initial state and reset of the micropro­
cessor
A. Initial state of the microprocessor from the
factory
Default setting after reset
Display
Frequency: 4.000 (144.000 MHz)
[0.000 (220.000 MHz) with the
TM-3530A]
Offset: [^(Simplex)
Memory channel: CH 1
KENWOOD TM-2550A
S
ij n n n
l.u U LI MH,
144MHI FM TRANSCEIVER
4CS »CSQ RESET SCHL
□ n □ □ D
Display after reset
B. Microprocessor reset
When the microprocessor has functioned erroneously or
when setting the transceiver in the initial state, switch on
the power with the PS key pressed.
Note;
The microprocessor can be easily reset. However, only
perform this operation when necessary since the con­
tents of memory are cleared by resetting.