UH-O537, Simplex/Duplex Communication

Qperation

Note: Before operating the UH-oS3for the first time, make sure you have fully charged the battery.

1.Turn the UH-oS3on by rotating the On-OffNolume Control clockwise until you hear a click.

2.Adjust the Volume Control to a comfortable level.

3.Turn the Squelch Control fully counter- clockwise. You will hear background noise, and the BUSY Indicator will light. Turn the Squelch Control just until the background noise disappears and the BUSY Indicator goes out. At this setting, the received signal must be strong enough (>0.25jlV) to break squelch and be heard.

4.If the channel is clear, the BUSY Indicator will be out. (If the BUSY Indicator is lit, the channel is busy. Wait until the light goes out before you begin transmitting.) Press the PTT Switch to transmit. The TX Indicator lights to indicate you are transmitting. Hold the built-in microphone (or optional Speaker/Microphone) approximately two inches from your mouth and speak clearly in a normal voice.

5.When you are through speaking, release the PTT switch and listen for a reply. (The TX Indicator goes out.)

6.When you are finished using the radio, be sure to turn it off to conserve battery power.

Simplex/Duplex Communication

Duplex Operation allows the Sundowner UH-oS3to operate via a repeater station on Channels 1 through8. The set receiveson these channels but transmits750 kHz higherthan the receiverfrequency.

When the Simplex/Duplex switch is set to Simplex position,the set receivesand transmits on the samechannel. (SimplexCommunication)

To use Duplex operation on a Channel where Repeater Service is available, set the Simplex/Duplexselectorswitchto "Duplex".

To put the Duplex channel back to normal Simplex operation, set the Simplex/Duplex Selectorswitchto "Simplex".