Assessments - 3, GPA: 4
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Facilidade de uso
RECEIVER OPERATION 4-2-1. Receiver Operation Connect the battery pack, and the supplied antenna. Set the controls as follows: 1. Rotate the POWER switch clockwise to turn the transceiver ON. A frequency will appear in the display. 2. As the VOL control is rotated clockwise either background noise or a QSO will be heard coming from the speaker, provided the CTCSS and squelch are not ON. 3. To eliminate the no signal noise turn the SQL control clockwise to the point the background noise just disappears. This point is known as the squelch threshold point. 4. Select the desired operating frequency using the Tuning control. 4-2-2. Frequency Selection • VFO Mode 1. Press the VFO key. 2. Turn the Tuning control to increase / decrease the frequency. The step size is determined by the location of the VFO indicators. (See Step Size Selection below.) • MHz Mode 1. Press the MHz key. The MHz indicator will begin flashing. 2. The Tuning control will now increase / decrease the operating frequency in 1 MHz increments. 3. The tuning step will revert to the VFO mode 10 seconds after you stop turning the Tuning control. 4-2-3. Step Size Selection The frequency step is indicated in the chart below. —* 5-10-15-20-12.5-25-- To select the desired tuning or scan step size use the following procedure: 1. Press the VFO key to select the VFO mode. 2. Press the F key momentarily. The F indicator should light in the display. 3. Press the MHz key within 10 seconds of pressing the F key. The current frequency step size will be displayed. 4. Rotate the Tuning control until the desired tuning step size appears in the display. 5. To complete the programming of the step size you can press MHz key or simply wait 10 seconds and the microprocessor will automatically return to the normal frequency display. 19 The chart below illustrates the way the displayed frequency will change when you change from one step size to another. 5 . 10. 15. 20 to 12.5. 25 12 5. 25 to 5 . 10. 15. 20 0 . 5 „ 10. 15 0 0 0 12.5 10 20. 25. 30. 35 25 25 20 37.5 30 40. 45. 50. 55 50 50 50 62.5 60 60. 65. 70. 75 80. 85. 90. 95 75 75 70 87.5 80 For example: Assume you are presently displaying a frequency of 439.920 MHz and had previously selected a 20 kHz step size. If you were to change the step size to 12.5 kHz the display would then read 439.925 MHz. 4-2-4. Programmable VFO tuning limits The radio provide the capability of programming the VFO tuning range, in 1 MHz band segments, as well a providing a separate programmable band scan function. (See section 4-5.) For example you could tell the transceiver that you only wish to tune the 144.000 MHz and 145.000 MHz band segment by specifying any frequency with these two segments. The Tuning controls would then only tune within these specific bands. The procedure for specifying the bands is described below. 1. Press the VFO key to select vfo the VFO mode. c j 20 2. Rotate the Tuning control until the desired lower tuning range appears in the frequency display. For example you might want to select the 144 MHz band, and dial up 144.100 MHz. 3. Turn off the transceiver POWER switch. Now press and hold the SHIFT key while you turn on the POWER switch. You will hear a beep when you turn the radio back on. This indicates that the lower limit has been successfully stored in memory. 4. Now select the desired upper tuning limit using the MHz key and the Tuning control. With our example we want the upper band limit to be in the 145 MHz band, and therefore dial up 145.100 MHz. 5. Turn off the transceiver POWER switch. Now press and hold the REV key while you turn on the POWER switch. You will hear a beep f "N in/7 IUu POWER OFF V* © SHIFT POWER ON NS. s in/? IUu j POWER OFF POWER ON back on. This indicates that the upper limit has been successfully stored in memory. 6. To confirm that the programming was properly performed rotate the Tuning control. The transceiver should not go above or below the programmed band limits. 7. To clear both programmed limits simultaneously you should initialize the VFO memory using the procedures discussed on page 13. You can reprogram either limit independently by following the appropriate instructions above. 4-2-5. Beep Tones _ njU nnn _ r n\UUu L (L/C OQ5 - (Step size selection: 5kHz) POWER ON Pressing the T.ALT key with 10 seconds of pressing the F key will turn the BEEP tones OFF or ON. 4-3. TRANSMITTER OPERATION CAUTION Ensure that an antenna with a low standing wave ratio (SWR) is attached to the antenna connector before attempting to transmit. Failure to provide proper termination may result in damage to the final amplifier section. Always check to ensure the frequency is clear before transmitting. 1. Select the desired operating frequency using any of the methods described above. 2. Check the frequency to see if it is occupied before you transmit. If you are using CTCSS (Tone Squelch) press the MONI switch to all...
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