Harman Kardon HK330I Owners Manual - Page 7

Antenna Instructions AM Antenna This unit is equipped with a high-sensitivity ferrite loopstic antenna. It requires no additional outdoor antenna for AM reception except in a fringe reception area where signals are weak. •Ferrite Loopstic Antenna Pul l this ferrite loopstic antenna away from the rear panel . Adjust it by changing its direction within the range shown in the figure to create the optimum reception. • If the ferrite loopstic antenna is touching the rear panel, or is too close to it, unpleasant noise may be generated. Keep the antenna further away from the rear panel. • Noise may be generated if the power cord or the speaker cords are placed near the ferrite loopstic antenna. •AM Outdoor Antenna Erect this antenna in a fringe area or inside a concrete building where the reception is weak and the sound is unpleasant to the ear. (Refer to the picture for the connection.) FM Antenna Choose an appropriate antenna for your area and receiving conditions for the reproduction of excellent sound of FM broadcasting. •Accessory Feeder Antenna This accessory feeder antenna is sufficient in an area with good field reception. Connect the antenna with FM antenna terminal (30052 BA L). Stretch both ends fully to the sides. Adjust their position by moving them up and down and set them where the reception is optimum with thumbtacks. Push it ou straight b Set it with a thumb tack •FM Outdoor Antenna In an area near the broadcasting station where the field intensity is sufficiently high or in a suburban area characterized with less noise, the accessory feeder antenna is often sufficient. However, it is suggested to erect an outdoor antenna exclusively for FM reception in order to al low this unit to perform to its ful lest. If there is not enough room for erecting an outdoor antenna, use a smaller type, which can be set on the veranda or hung from the ceiling. Selecting FM outdoor antenna Where the wave is strong (near the broadcasting station where the transmitting antenna is visible). ►Erect and antenna with 3 to 5 elements. Where the wave is weak (behind a mountain or in-between large buildings). ►Erect an antenna with 5 elements or more. Consult your dealer for selecting an antenna with appropriate number of elements. • Feeders The connecting wire between the feeding point of the antenna input terminal is called a feeder. Most feeders are 3001-2 paral lel or 7552 coaxial cables. The coaxial cable has a larger amount of loss, but it has a stronger resistance against peripheral hindrances, and lasts longer. We recomment 3C-2V or 5C-2V coaxial cables to be used for this unit to al low it to perform to its ful lest capacity. • Impedance Matching If a 7552 coaxial cable is to be used, it is necessary to match the impedance by instal l ing a matching transformer between the outdoor antenna and the FM antenna terminal (752 UN BAL) of the unit. Connect the outdoor antenna and the matching transformer with a 30052 paral lel feeder cable, and connect the matching tarnsformer and the FM antenna terminal on the rear panel of this unit with a 752 coaxial cable. Instal l the matching transformer as close to the outdoor antenna as possible. ►An outdoor antenna with five elements or more usual ly contains a matching transformer so that 7552 cable can be directly connected. 30052 parallel feeder cable Matching 7512 coaxial transformer cable 200 • Locations for FM Outdoor Antenna Installation The following is suggested for selecting instal ltion sites. 0 A place which allows direct FM reception, without hin- drance by buildings. Indirect wave don't enter directional range ndirect wave Direct wave TI ►This is to prevent multipath hindrance by indirect waves interfering with the direct wave. ©A place as much away as possible to prevent sensing automobile ignition noises. A place at least 2m away from a metal roof, a concrete building or other antenna. 0 Normally the antenna should be erected at least 4m above the ground except in a high-altitude or other special areas. 7