User manual ICOM IC-740

[. . . ] NEVER attach an antenna or internal antenna connector during transmission. This may result in an electrical shock or burn. Place unit in a secure place to avoid inadvertent use by children. During mobile operation, DO NOT operate the transceiver without running the vehicle's engine. [. . . ] w Preset the transceiver as follows: [COMP] function : OFF [METER] function : ALC [MIC GAIN] control : Center position [COMP] control : Center position [RF POWER] control : Max. counterclockwise e Transmit at your normal voice level. r Adjust the [MIC GAIN] control so that the ALC meter reads within the ALC zone, whether or not you speak softly or loudly. t Push [COMP] momentarily to turn the speech compressor ON. [MIC GAIN] control [RF POWER] control [COMP] switch [COMP] control I Preamp The preamp amplifies received signals in the front end circuit to improve the S/N ratio and sensitivity. Push [P. AMP] to select one of 2 receive RF preamps or to bypass them. · "P. AMP1" activates 10 dB preamp for HF all bands. AMP2" activates 16 dB high-gain preamp for 24 MHz band and above. [P. AMP] switch Regarding the use of the "P. AMP 2" (Pre-amplifier 2) The "P. AMP 2" is a high gain receive amplifier. When the "P. AMP 2" is used during times of strong electric fields, distortion sometimes results. In such cases, use the transceiver with the "P. AMP 1" or "P. AMP OFF" setting. The "P. AMP 2" is most effective when: · Used on bands above 24 MHz and when electric fields are weak. · Receive sensitivity is insufficient during low gain, or while using a narrow band antenna (such as small loop, a Beverage antenna or a short Yagi antenna, etc. ) is used. 37 5 RECEIVE AND TRANSMIT I Digital voice recorder The transceiver has a total of 8 memory channels, 4 each for transmit and receive, of digital voice memories. y Push [EXIT/SET] twice to exit the voice memory screen. ----------------Remain 90s · Programming a memory name for transmit Memory channels can be tagged with alphanumeric names of up to 20 characters each. Capital letters, small letters, numerals, some symbols _ (!, : ; = < > ( ) [ ] { } | _ ) and spaces can be used. (See step t below. ) q Record a message as described at left. w Call up the voice memory recording screen as described in steps q to e at left. e Push [(F-5)NAME] to enter memory name edit condition. · A cursor appears and blinks. T2 T3 T4 NAME r Push the desired memory channel switch, [(F-1)T1] ­ [(F-4)T4], for 1 sec. to start recording. · Speak into the microphone without pushing the [PTT] switch. · Previously recorded contents are cleared. AGC MID VOX OFF COMP OFF WIDE T1 VOICE MIC-RECORD REC T1 T1 T2 T2 T3 T3 T4 T4 0 50 100 % 10s 10s ------------Remain 80s REC LEVEL r Push [(F-5)T1. . T4] several times to select the desired voice memory. Selected character Character group keys ABC ABC T1 T2 T3 T4 T2 T3 T4 NAME VOICE MIC-RECORD 10s 10s t Adjust the [MIC GAIN] control so that the [REC LEVEL] indicator reads within 100%. y Push the selected memory channel switch, [(F-1)T1] ­ [(F-4)T4], again to stop recording. · Recording is automatically terminated when the total time of recorded messages, T1­T4, becomes 90 sec. ------- 123 ç å DEL SPACE T1. . T4 u Push [EXIT/SET] twice to exit the voice memory screen. t Input the desired character by rotating the tuning dial or by pushing the band key for number input. · Push [ABC] or [abc] to toggle capital and small letters. · Push [123] or [etc] to toggle numerals and symbols. · Push [(F-1)] or [(F-2)] for cursor movement. [. . . ] The PTT tuner start function provides simple operation. · Input power rating: 120 W · Frequency coverage: 7­54 MHz bands with the AH-4 Unidirectional, electret microphone for base station operation. Includes [UP]/[DOWN] switches and a low cut function. HM-36 HAND MICROPHONE Hand microphone equipped [UP]/[DOWN] switches. SP-21 EXTERNAL SPEAKER CT-17 CI-V LEVEL CONVERTER with UT-102 VOICE SYNTHESIZER UNIT Announces the receive frequency, mode and S-meter level in a clear, electronically-generated voice, in English (or Japanese). SP-20 EXTERNAL SPEAKER 4 audio filters; headphone jack; can connect to 2 transceivers. · Input impedance: 8 · Max. [. . . ]