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Kenwood TS-870S Manual

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30
CW
AGC AUTO
S
9
7
5
3
1
10
25
50
FILTER
ALC
0
20
40
100
6
0
W
d
B
CW
AGC
AUTO
The following selections are available:
• 400 ~ 1000 Hz inclusive in 50 Hz steps
Note:
Changing the RX pitch frequency does not shift the center
frequency of the receive filter pass band. If a CW signal becomes
inaudible, shift the pass band by adjusting the
HI/SHIFT
control.
Refer to “IF SHIFT” {page 51}.
ZERO-BEATING
Zero-beating means matching your transmit frequency
with the station that you are receiving. This is important
if you expect other stations to hear you without them
retuning their receivers. Zero-beating also saves space
on the band since only a single frequency is used by
you and the other station for your contact. If you are
part of a “roundtable” where more than two stations are
participating but each is on a different frequency, it’s
frustrating to keep retuning to a different frequency each
time one of the roundtable stations begins sending.
Learn to zero-beat accurately and quickly.
1 Press [VOX] and press [RIT] to switch OFF the VOX
and RIT functions respectively.
• “VOX” and “RIT” go out.
2 With CW mode selected, turn the Tuning control to
tune in a CW station for maximum signal strength.
3 Close your key to activate the sidetone.
•You will hear a steady tone.
4 Turn the Tuning control until the note from the
received CW signal matches the sidetone note, then
release the key.
•To double check that you are zero beat, press
[CW/–R] to switch to the opposite sideband. You
should hear no difference in tone of the received
CW signal.
SWITCHING TX/RX MANUALLY
1 Select CW mode by pressing [CW/–R].
• “CW” lights.
2 Press [SEND].
• The receive audio is muted.
• Holding down Microphone [PTT] also switches
between receive and transmit.
3 Send CW.
4 When finished sending, release [SEND] or [PTT].
CW TRANSMISSION
CW operators know that this mode is a reliable method
of communicating under the worst conditions. Although
it’s true that newer digital modes rival CW as being
equally as useful in poor conditions, these modes do
not have the long history of service yet nor the
simplicity that CW can have. Therefore, functions
required by CW operators were given serious
consideration from the start of the TS-870S design.
Refer, if necessary, to “OPERATING BASICS”
beginning on page 19 for complete receiving details for
any mode.
1 Select the operating frequency.
2 Press [CW/–R] to select CW mode.
3 Select the ALC meter function by pressing
[METER].
4 Press [SEND].
• The “ON AIR” indicator lights.
•Refer to “SEMI BREAK-IN” {page 31} or “FULL
BREAK-IN” {page 31} for information on
automatic TX/RX switching.
5 With a key down condition, adjust the CAR control
so that the meter reads in the ALC zone but doesn’t
exceed the upper ALC zone limit.
6 After completing your transmission, press [SEND]
again to return to the receive mode.
• The “ON AIR” indicator goes out.
TX SIDETONE/ RX PITCH FREQUENCY
The transmit sidetone is the monitor tone you hear from
your transceiver as you send CW. It is necessary so
you can hear what you are transmitting. It is also useful
for checking that your key contacts are closing, the
keyer is functioning, or for sending practice without
putting a signal on the air. The volume of the sidetone
is adjusted by the MONI control.
Receive pitch refers to the frequency of the CW note
that you hear after tuning your receiver for maximum
receive signal strength. On the TS-870S, the frequency
of the sidetone and receive pitch are equal and
selectable. You can select the frequency that is most
comfortable for you via Menu No. 24 (PITCH). The
default is 800 Hz.
6 COMMUNICATING
… 36 …


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