User manual ICOM IC-7400

[. . . ] INSTRUCTION MANUAL HF/VHF ALL MODE TRANSCEIVER i7400 FOREWORD We understand that you have a choice of many different radios in the market place. We want to take a couple of moments of your time to thank you for making the IC-7400 your radio of choice, and hope you agree with Icom's philosophy of "technology first". Many hours of research and development went into the design of your IC-7400. PRECAUTIONS R WARNING HIGH VOLTAGE!NEVER attach an antenna or internal antenna connector during transmission. This may result in an electrical shock or burn. [. . . ] Decode New Line Selects the new line code of the internal RTTY decoder. CR: Carriage Return; LF: Line Feed CR, LF, CR+LF CR+LF CR, LF and CR+LF CR+LF only Decode New Line 5 CR, LF, CR+LF 6. Decode Screen Selects the number of the decoder indication from 2 or 3 lines. Decode 6 Screen 3line 39 RECEIVE AND TRANSMIT 4 I Operating AM q Push a band key to select the desired band. e Rotate [AF] to set audio to a comfortable listening level. r Rotate the tuning dial to tune a desired signal. · S-meter indicates received signal strength. · The default tuning step for AM mode is 1 kHz; this can be changed using the tuning step program mode. 21) [TRANSMIT] [TX] indicator Band keys t Push [TRANSMIT] or [PTT] (microphone) to transmit. · The TX indicator lights red. [MIC GAIN] [AM/FM] Tuning dial Appears y Speak into the microphone at your normal voice level. · Adjust [MIC GAIN] at this step, if necessary. u Push [TRANSMIT] or release [PTT] (microphone) to return to receive. D Convenient functions for receive · Preamp and attenuator (p. 47) Push [P. AMP/ATT] several times to set the preamp OFF, preamp 1 ON or preamp 2 ON. · "P. AMP1, " "P. AMP2" or "P. AMP" appears when the preamp 1, preamp 2 or preamp is set to ON, respectively. (depending on operating frequency band) · Auto notch filter (p. 52) Push [A/NOTCH] to turn the auto or manual notch filter ON and OFF. · Rotate [NOTCH] control to set the attenuating frequency for manual notch operation. Push [P. AMP/ATT] for 1 sec. to set the attenuator ON. · Push [P. AMP/ATT] momentarily to turn the attenuator OFF. · "ATT" appears when the attenuator is set to ON. · IF shift (p. 51) Rotate [TWIN PBT] controls (inner only). · Push [PBTC] to clear the settings. · Noise blanker (p. 50) Push [NB] to turn the noise blanker ON and OFF. · "NB" appears when the noise blanker is set to ON. to enter noise blanker set mode. · AGC (auto gain control) (p. 48) While M1 is selected with [MENU], push [F1 AGC] several times to select AGC F, AGC M, AGC S or AGC OFF. · VSC (voice squelch control) (p. 53) While M2 is selected with [MENU], push [F5 VSC] to turn the VSC function ON and OFF. · The VSC indicator appears when the voice squelch function is set to ON. · Noise reduction (p. 52) Push [NR] to turn the noise reduction ON and OFF. · Rotate [NR] control to adjust the noise reduction level. · "NR" appears when the noise reduction is set to ON. D Convenient functions for transmit · Speech compressor (p. 57) While M1 is selected with [MENU], push [F3 CMP] to turn the speech compressor ON and OFF. · "COMP" appears when the speech compressor is set to ON. · Transmit quality monitor (p. [. . . ] Please do not use this equipment within European countries. 100 17 ABOUT CE INSTALLATION NOTES For amateur base station installations it is recommended that the forwards clearance in front of the antenna array is calculated relative to the EIRP (Effective Isotropic Radiated Power). 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. [. . . ]