Kenwood TS-430S Manuel d'utilisateur télécharger pdf (Page 11)

5.2 TRANSMISSION (Fig. 5-4)

CAUTION:

----------------------------------------------------

Before transmitting, be sure to connect an antenna or

dummy load with a VSWR of less than 1.5:1. Never at

tempt to transmit with the antenna terminal left open.

When testing the transmitter, use a 50-ohm dummy load,

rated at greater than 100W (TS-430S). Refer to Fig. 5-1

for initial control settings. When the TS-430S is ready for

transmission, use the following procedures:

TS-430S

W B

Power meter

Dummy load

Fig. 5-4 Testing with Dummy Load or

Power Meter

5.2.1 SSB Operation

1. Set the MODE switch to SSB.

2. Meter switch to ALC.

3. Standby switch to SEND.

4. Speak into the microphone and adjust the MIC GAIN for

meter deflection within the ALC zone at signal peaks.

5. For QRP (Low Power) operation, use less MIC GAIN and

consult your external wattmeter for output level.

5.2.2 AM Operation

1. Set the MODE switch to AM and the meter switch to

1C.

2. Place the STANDBY switch to SEND and adjust the

CAR control so the meter registers approximately 2/3

its usual deflection.

3. Speak into the microphone and advance the MIC GAIN

control so the meter deflects only slightly at peaks.

Note that excessive meter deflection indicates overmo

dulation.

4. The PROC may be used to provide a more constant mo

dulation level.

5.2.3 PROC (processor) operation

In DX (long distance) SSB or AM operation, it may be de

sirable to increased talk-power by using the speech pro

cessor.

The speech processor in the TS-430S combines an audio

compression amplifier with changes in ALC time constant

to provide extra audio punch and increases average SSB

output power, while suppressing sideband splatter. To

activate, turn on the PROC switch, and readjust MIC gain.

Operated as described, distortion will be minimal. How

ever, tone quality will be affected. It is therefore advisa

ble to conduct normal operation with the processor dis

abled.

NOTE: -------------------------------------------------------------------------------

When a high-output microphone is used, input overload

and distortion may result.

To prevent this, use an attenuator in the microphone cir

cuit as shown below, or connect a 10 - 33ki3 resistor (de

pending on the microphone used) across the microphone

input. (Mic control setting should be approximately 12 o'

clock)

10k — 33 kil (depending on micropone used.)

-----

^N^

--------

•

---------

from microphone

---------

to the MIC connecter

-O

The MC-60A microphone is recommended (Microphone

sensitivity: -55 ±3dB for approx. 5 cm distance to the

mic). The MC-60A MIC AMP Switch should be set at the

OUT position.

5.2.4 CW Operation

1. Set the MODE switch to CW and the meter switch to

ALC.

2. Set the standby switch to SEND and adjust the CAR

control so the meter deflects within the ALC zone. If a

key is connected, it should be depressed during the ad

justment.

3. For QRP operation, adjust the Carrier Control below the

ALC point.

NOTE: --------------------------------------------------------------------------------

Full power operation (more than 5 minutes at ambient

temperature of 25°C, in case of 10 MHz band, more than

30 seconds because of final efficiency), with the key kept

depressed may result in unit trouble. At this time, pay

attention to installation condition as well as ambient tem

perature, and decrease the power or operate the unit after

an interval.

5.2.5 FM Operation (With FM-430 FM unit installed)

1. Place the MODE switch to FM.

2. Place the STANDBY switch to SEND.

3. Speak into the microphone. (In the FM mode, the MIC

GAIN, CAR and meter switches are not used.)

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Kenwood TS-430S Manuel d'utilisateur Page 11

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