Reception - Kenwood TR-851A Instruction Manual

4-2. RECEPTION
4-2-1. Beep tones
Audible confirmation of microprocessor functions is
provided in the form of a series of audio beeps. The
volume of the beeps can be adjusted by an internal
potentiometer. (See page 36)
Beep tone Meaning
i Short beep ON. Frequency changed from upper limit to tower limit {or from lower limit to upper limit). ~]
1 long beep | orF. Channel 1 set during memory channel switching.
, 1 long beep Power turned on.
1 long beep Memory channel written.
2 short beeps
Memory 1 channel busy during alert.
3 short beeps: Error (frequency out of range in OFFSET o or REV).
"4 short beeps (repeated) _
been pressed).
Send freuquency ready to be written to 'memory (When memory channel 9 or O keys have |
5 short beeps A key operated while LOCK light is ON.
"8 short beeps | Standby for memory write (For about . 5 seconds after M key is pressed}.
4-2-2. Initial setting
Connect the power supply and the antenna then set
the knobs and switches as follows:
VOL control : Fully counterclockwise
SQL control : Fully counterclockwise
RIT control ; Center
RF GAIN control: Fully clockwise
Other switches : All OFF
4-2-3, Reception
In the USB, LSB, and CW modes, the noise level is
generally low, so you can usually operate with the
SQL contro! full counterclockwise. This will also help
your weak signal reception.
1. Press the POWER switch; the display panel will
indicate as shown below and the Meter, the
Mode (AUTO and FM with the TR-851A, AUTO
and CW with other models) and the BUSY lights
will turn on.
(With the TR-851A/851E}
a ee ee |
Weigel f
(With the TR-751A/TR-751€)
Ej
U AA
Litt | fj
Note:
If the display is not as shown, reset the micro-
processor using the procedure in section 4-4-2.
2. Turn the VOL control clockwise until a QSO or
noise is heard; adjust for the desired level.
Clockwise rotation of the control will increase
the volume and counterclockwise rotation will
decrease the volume.
3. To eliminate receiver noise during no-signal
periods, slowly adjust the SQL contro! clockwise
until the noise disappears and the BUSY in-
dicator goes OFF (threshold point).
4. Rotate the TUNING knob to the desired frequen-
cy. When a signal is received the S meter will
deflect and the BUSY indicator will light.
A. SSB zero beating
If the frequency of your station and the distant sta-
tion are not the same reception of a clear receive
signal may be difficult.
(Matching your station's transmit frequency to the
distant station's transmit frequency is called ''zero
beating')
(a) To zero in, first set the F.STEP key to OFF to
toughly tune the other station's frequency in
5 kHz steps, then set the key to ON for fine tun-
ing. When the TUNING knob is slowly turned
clockwise in the USB mode, the receive signal
becomes lower in pitch. (The reverse effect
takes place in the LSB mode.) Rotate the TUN-
ING knob until! the clearest most natural sound is
heard.
{b
=
If the frequency of the other station deviates
during the QSO, set the RIT switch to ON and
rotate the RIT knob until a natural sound is again
received.
15