User manual ICOM IC-7410

[. . . ] INSTRUCTION MANUAL HF/50 MHz TRANSCEIVER i7410 FOREWORD Thank you for making the IC-7410 your radio of choice. We hope you agree with Icom’s philosophy of “technology first. ” Many hours of research and development went into the design of your IC-7410. SUPPLIED ACCESSORIES The transceiver comes with the following accessories. q Hand microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 w power cable* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] r  ush [MENU] to save, and return to the previous P display. RTTY NOTE: When the Twin Peak Filter is in use, the received audio output may increase. This is normal; not a malfunction. DEC TPF SET RTTY RTTY–TPF DEC ON TPF SET Appears when the Twin Peak Filter is ON. 47 RECEIVE AND TRANSMIT 4 D RTTY Set mode The RTTY Set mode is used to set the mark and shift frequencies, keying type, decode USOS function, RTTY decoder new line code and the number of decode screen display lines. • Setting contents q n the RTTY mode, push [MENU] to display the “M1” I screen (Menu 1). w  ush [RTTY](F-4) to display the “RTTY” screen. P e  ush [SET](F-5) to enter the RTTY Set mode. P r  ush [Y](F-1) or [Z](F-2) to select the desired P item. t Rotate [DIAL] to select the desired option. •  old down [F-3] for 1 second to reset to the default setH ting, if desired. SET RTTY √ 1 ∫ Mark Freq 2125 1 Select the item Reset to the default setting 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 48 y  ush [MENU] to save, and return to the “RTTY” P screen. P u  ush [MENU] again to return to the “M1” screen. 1. RTTY Mark Freq Select the RTTY mark frequency. (Default: 2125) 4. Decode USOS (Default: ON) • 1275, 1615 and 2125 Hz are selectable. Turn the USOS (UnShift On Space) function ON or OFF. This function decodes a letter code after receiving a “space. ” • OFF : Decodes as a character code • ON : Decodes as a letter code 2. RTTY Shift Width Select the RTTY frequency shift. • 170, 200 and 425 Hz are selectable. (Default: 170) 5. Decode New Line (Default: CR, LF, CR+LF) Select the internal RTTY decoder new line code. CR: Carriage Return, LF: Line Feed • CR, LF, CR+LF : Makes a new line with any code. • CR+LF :  akes a new line with only the M CR+LF code. 3. RTTY Keying Pol (Default: NORMAL) Select normal or reverse keying polarity. • NORMAL : Key open/close = Mark/Space • REVERSE : Key open/close = Space/Mark 6. Decode Screen (Default: 3 line) Set the decoder screen display mode to 2 or 3 lines. 4 RECEIVE AND TRANSMIT ■ Operating AM/FM q Select the desired band. 25) w Push [AM/FM] to select the AM or FM mode. • f desired, after AM or FM is selected, hold down [AM/ I FM] for 1 second to select the data mode. • The S-meter displays the received signal strength. •  he tuning step can be changed in the tuning step proT gram mode. 27) [MIC] [AF] [AM/FM] [DIAL] Appears [TRANSMIT] TX indicator Band keys e Rotate [DIAL] to tune a desired signal. r  otate the [AF] control to adjust the audio to a comR fortable listening level. t  ush [PTT] on the microphone to transmit (or P [TRANSMIT] on the transceiver). • The TX indicator lights red. • AM mode Appears y  peak into the microphone at your normal voice S level. •  otate the [MIC] control to adjust the microphone gain R in this step, if necessary. u  elease [PTT] to receive (or push [TRANSMIT] R again). M1 AGC TBW SCP • FM mode RTTY SET √ 1 ∫ Mark Freq Appears 2 1 2 5 Convenient Receive functions • Preamp and attenuator (p. 55) • Twin PBT (Passband Tuning)* (p. 61) • VSC (Voice Squelch Control) (p. 76) *AM only Convenient functions for transmit • Speech Compressor (p. 64) • VOX (Voice Operated Transmit) (p. [. . . ] The clearance height below the antenna array can be determined in most cases from the RF power at the antenna input terminals. As different exposure limits have been recommended for different frequencies, a relative table shows a guideline for installation considerations. Below 30 MHz, the recommended limits are specified in terms of V/m or A/m fields as they are likely to fall within the near-field region. Similarly, the antennas may be physically short in terms of electrical length and that the installation will require some antenna matching device which can create local, high intensity magnetic fields. [. . . ]