Assessments - 3, GPA: 4
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(Also known as "Simplex".) "+" Transmit frequency is 5 MHz higher than the receive frequency. Transmit frequency is 5 MHz lower than the receive frequency. TH-41E Shifts the transmit frequency for repeater operation. "S" Simplex (receive and transmit frequencies are the same). "D - A" Sets the transmit frequency 7.6 MHz lower than the frequency set by the thumb wheel switches. "D - B" Switches the transmit frequency down 1.6 MHz from the receive frequency. TH-31 A/31 BT Shifts the transmit frequency for repeater operation. "S" Simplex (receive and transmit frequencies are the same). "REV” Sets the receive frequency 1.6 MHz lower than the frequency set by the thumb wheel switches. Switches the transmit frequency down 1.6 MHz from the receive frequency. TH-21 A/21 BT "+" Transmit frequency is 600 kHz higher than the receive frequency. Transmit frequency is 600 kHz lower than the receive frequency. "S" Transmit and receive frequency are the same. (Also known as "Simplex".) TH-21E Shifts the transmit frequency for repeater operation. "S" Simplex (receive and transmit frequencies are the same). "REV" Sets the receive frequency 600 kHz lower than the frequency set by the thumb wheel siwtches. Switches the transmit frequency down 600 kHz from the recieve frequency. 8 (H) Tone frequency setting switches (6P dip switches) (TH-41BT/ 31 BT/21 BT) Tone frequency setting table Tone ON.. 1, OFF...O Tone ON.. 1, 0FF...0 frequency 1 2 3 4 5 6 frequency 1 2 3 4 5 6 1 67.0 0 0 0 0 0 0 21 141.3 0 1 1 1 1 1 2 71.9 0 0 0 0 1 0 22 146.2 1 0 0 0 1 0 3 74.4 0 0 0 1 0 0 23 151.4 1 0 0 0 1 1 4 77.0 0 0 0 0 1 1 24 156.7 1 0 0 1 1 0 5 79.7 0 0 1 0 0 0 25 162.2 1 0 0 1 1 1 6 82.5 0 0 0 1 1 0 26 167.9 1 0 1 0 1 0 7 85.4 0 0 1 1 0 0 27 173.8 1 0 1 0 1 1 8 88.5 0 0 0 1 1 1 28 179.9 1 0 1 1 1 0 9 91.5 0 1 0 0 0 0 29 186.2 1 0 1 1 1 1 10 94.8 0 0 1 0 1 0 30 192.8 1 1 0 0 1 0 11 100.0 0 0 1 0 1 1 31 203.5 1 1 0 0 1 1 12 103.5 0 0 1 1 1 0 32 210.7 1 1 0 1 1 0 ;13 107.2 0 0 1 1 1 1 33 218.1 1 1 0 1 1 1 14 110.9 0 1 0 0 1 0 34 225.7 1 1 1 0 1 0 15 114.8 0 1 0 0 1 1 35 233.6 1 1 1 0 1 1 16 118.8 0 1 0 1 1 0 36 241.8 1 1 1 1 1 0 17 123.0 0 1 0 1 1 1 37 250.3 1 1 1 1 1 1 18 127.3 0 1 1 0 1 0 19 131.8 0 1 1 0 1 1 20 136.5 0 1 1 1 1 0 5. Operation 5.1. Reception (1) Turn the VOL control to the right to supply power, and adjust the volume control to the desired level. (2) Adjust the squelch control clockwise until the background noise just quiets. (3) Adjust the frequency switches to the desired receive frequency. 5.2. Transmission (1) Select the desired transmit offset. (2) Check to see that the frequency is not busy. (3) Press the PTT switch and speak into the microphone. The ON AIR indicator will light. Note: The distance between the microphone and your mouth is 5 -10 cm. 5.3. DTMF key pad operation (TH-41 BT/31 BT/21 BT only) (1) To operate the keyboard as a DTMF key pad press the PTT switch and dial the desir...
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