Galaxy DX−33HML Benutzerhandbuch - Seite 4

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RECEIVER

Sensitivity

Selectivity

Image Rejection

IF Frequency

Adjacent-Channel

Rejection

RF Gain Control

Automatic Gain Control

(AGC)

Squelch

ANL

Noise Blanker

Audio Output Power

Frequency Response

Built-in Speaker

External Speaker (Not

Supplied)

AM: 0.5 µV for 10 dB (S+N)/N at greater than

½ -watt of audio output.

FM: 1.0 µV for 20 dB (S+N)/N at greater than

½-watt of audio output.

AM/FM: 6 dB @ 3 KHz, 50 dB @ 9 KHz.

More than 65 dB.

AM/FM: 10.695 MHz 1

IF, 455 KHz 2

60 dB AM

adjustable

for

optimum

reception.

Less than 10 dB change in audio output for

inputs from 10 to 100,000 microvolts.

Adjustable; threshold less than 0.5 µV.

Switchable

RF type

4 watts into 8 ohms.

300 to 2800 Hz.

8 ohms, round.

8 ohms; disables internal speaker when

connected.

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ATERNATE MICROPHONES AND INSTALLATION

For best results, the user should select a low-impedance dynamic type

microphone or a transistorized microphone. Transistorized type microphones have

a low output impedance characteristic. The microphones must be provided with a

four-lead cable. The audio conductor and its shielded lead comprise two of the

leads. The fourth lead is for receive control, and the third is for transmit control.

The microphone should provide the functions shown in schematic below.

signal

If the microphone to be used is provided with pre-cut leads, they must be revised as

follows.

1. Cut leads so that they extend 7/16" beyond the plastic insulating jacket of the

microphone cable.

2. All leads should be cut to the same length. Strip the ends of each wire 1/8" and

tin the exposed wire.

Before beginning the actual wiring read carefully, the circuit and

wiring information provided with the microphone you select. Use the

minimum head required in soldering the connections. Keep the exposed

wire lengths to a minimum to avoid shorting when the microphone plug is

reassembled.

4 WIRE MIC CABLE

Pin Number

Mic Cable Lead

Audio shield

Audio Lead

Transmit control

Receive Control

Fig. 1 Your transceiver microphone schematic.

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