Bedienungsanleitung Kenwood TS-870S (Seite 36 von 104) (Englisch)

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AGC AUTO

FILTER

ALC

100

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

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Kenwood TS-870S Seite 36

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