Radio Shack HTX-420 owner manual +014/#6+10

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Cross Band Channel Operation

You cannot transmit and receive at the same time.

Changing the Transmit Frequency Range

The extended transmit frequency range feature is only for MARS, CAP, and public service users. Once you change the setting to the extended ranges, be sure not to transmit on those frequencies unless you are licensed to do so.

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You can select one of the three transmitting power levels: High (no display), Mid (C appears), and Low (B appears). To select the level, repeatedly press H/L.

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You can select a transmit frequency in the VHF band and a receive frequency in UHF band or vise versa. Or, you can select a transmit frequency and a receive frequency in the same band. ±

1.Press F+XBO (SC). The main frequency

is duplicated at the sub frequency display. q appears to the right of the main frequency display.

2.Enter the transmit frequency on the main frequency display.

3.Press F+REV (8) to exchange the main frequency display and sub frequency display.

4.Enter the receive frequency on the main frequency display.

5.Press PTT to transmit using cross band.

To exit the cross band channel operation, press F+XBO (SC).

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You can set the transceiver to check a specified channel every 2.5 seconds while receiving any other channel. If the transceiver finds a signal on the specified channel, it automatically switches to it.

1.Select a frequency you do not want to miss while you receive another frequency.

2.Press DW. The transceiver duplicates the selected frequency on the sub frequency display.

3.Select a frequency you want to receive on the main frequency display.

The transceiver scans the channel on the sub frequency display every 2.5 seconds.

If you press PTT, the transceiver transmits the frequency on the sub frequency display and the dual watch is canceled. If you want to transmit the frequency on the main frequency display, press F+REV to exchange the frequencies.

If you hold down M, the transceiver scans for the frequency on the sub frequency display until you release M.

4'%'+8+0)"6*'"#+4"$#0& Repeatedly press until 7 appears to select the airband at the top of the display. Press

8or 9, or rotate CH to tune to the frequency you want to hear. The air band receiving range is 108 to 136.9875 MHz.

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You can change the standard transmit frequency ranges to extended ranges. ±

Standard Transmit Frequency Ranges:

2 m: 144–148 MHz

70 cm: 438–450 MHz

Extended Transmit Frequency Range:

2 m: 142.000–149.880 MHz

70 cm: 420.000–470.000 MHz

To extend the range, turn off the transceiver. Then while holding down SC+9, press PWR. To return to the standard range, repeat the above steps.

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This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

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Keep the transceiver dry; if it gets wet, wipe it dry immediately. Use and store the transceiver only in normal temperature environments. Handle the transceiver carefully; do not drop it. Keep the transceiver away from dust and dirt, and wipe it with a damp cloth occasionally to keep it looking new.

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If you use your transceiver in an area (such as a vehicle) that has many metal surfaces, the transmitted signal can reflect back into the radio and cause the PLL circuit to unlock. If this happens, ;HH appears. This is an inherent problem with this type of transceiver.

To avoid this problem, you can try reducing output power, use an external antenna, or relocate the transceiver when ;HH appears. If ;HH appears even when you are using an external antenna located away from the transceiver, service might be required.

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