User manual YAESU FT-2400H-2 SERVICE MANUAL

[. . . ] Before using your FT-2400H-2, be sure to read and follow the instructions in the "Before You Begin" section of this manual. GENERAL DESCRIPTION Congratulations on the purchase of your Yaesu amateur transceiver!Whether this is your first rig, or if Yaesu equipment is already the backbone of your station, rest assured that your transceiver will provide many hours of operating pleasure for years to come. The FT-2400H-2 is an elite-class HF transceiver providing exceptional performance both on transmit and receive. The FT2000 is designed for the most competitive operating situations, whether you primarily operate in contest, DX, or digital-mode environments. [. . . ] When transmitting in the AM mode, rotate the [RF PWR] knob so as to set a maximum (carrier) power output of 25 Watts. In the SSB mode, adjust the microphone amplifier gain to match the microphone and your voice level, set the [METER ] switch to the "ALC" position, close the PTT switch, speak into the microphone in a normal voice level, and adjust the [MIC] (gain) knob so that the ALC voltage (displayed on the right meter) stays within the ALC zone of the meter (up to 2/3 of full scale deflection) on voice peaks. ADVICE: The microphone gain of the AM mode has been programmed, at the factory, to a level that should be satisfactory for most situations. However, using Menu item "050 A3E MICGAIN, " you may set a different fixed value, or choose the "Ur" option, which then lets you use the front panel [MIC] knob to set the microphone gain in the AM mode. In this case, the [MIC] knob should not be advanced to the point where the ALC meter deflects. The transceiver will return to the receive mode. Page 64 FT-2400H-2 OPERATING MANUAL SSB/AM MODE TRANSMISSION ADVICE: ALC meter deflection may be caused by excessive drive power, but also by reflected power detected in the antenna system. If the impedance presented to the transceiver is different from 50 Ohms, ALC meter action may be observed that is not related to the proper setting of the [MIC] (gain) knob. Therefore, we recommend that you make [MIC] knob adjustments into a dummy load or antenna system presenting an impedance very close to 50 Ohms. The adjustment range is between 5 Watts and 100 Watts, and you should always use the minimum power necessary for maintaining reliable communications. SSB transmit average talk power is normally 10% to 50% of the peak power output. Voice characteristics, microphone qualities, parametric equalizer and compression settings affect actual talk power output. The " " icon will turn off, confirming that the ATU has been turned off. In the "Off" mode, the transceiver will be directly connected to the coaxial cable connected to your antenna, and will operate based on whatever impedance is present at the station end of the coax. NOTCH Indicator [DNR] Knob [DNR] Button ADVICE: The ATU circuit is located between the final amplifier and the rear-panel antenna jack; reception is not affected by the ATU. QUICK POINT: As shipped from the factory, only one ATU alignment point is saved on each Amateur band. This was memorized during the final alignment and performance verification stages on the production line. " icon occurs The momentary flickering of the " whenever you cross over into a new 10 kHz ATU memory window. NOTE: Please check the operating frequency before beginning the tuning process, to be sure you are not interfering with others who may already be using the frequency. TERMINOLOGY: Antenna Tuner Memories: The microprocessor of the ATU makes a note of the positions of the tuning capacitors and the selected inductors, and stores the data for each 10 kHz window in which tuning has occurred. This eliminates the need to re-tune every time you return to a frequency on which you already have completed the tuning process. Page 66 FT-2400H-2 OPERATING MANUAL USING THE AUTOMATIC ANTENNA TUNER ABOUT ATU OPERATION Figure 1 depicts a situation where normal tuning via the ATU has been successfully completed, and the tuning data has been stored in the ATU memory. In Figure 2, the operator has changed frequency, and the " " icon has become appeared. The operator presses and holds in the [TUNE] button for two seconds to begin impedance matching using the ATU. If a high SWR conditions exists (above 3:1), corrective action must be taken in the antenna system to bring the impedance closer to 50 Ohms. [. . . ] You may adjust the equalizer gain and Q-factor in this selected audio frequency via menu items "139 tUAd PE3 LVL" and "140 tUAd PE3 BW. " 146 tGEn VOX SEL Function: Selects the audio input source for triggering TX during VOX operation. Available Values: nic/dAtA Default Setting: nic nic(MIC): The VOX function will be activated by microphone audio input. dAtA(DATA): The VOX function will be activated by data audio input. 139 tUAd PE3 LVL Function: Adjusts the equalizer gain of the high range of the parametric microphone equalizer when the speech processor is activated. Available Values: ­10 ~ +10 Default Setting: +6 147 tGEn EMRGNCY Function: Enables Tx/Rx operation on the Alaska Emergency Channel, 5167. 5 kHz. [. . . ]