Kenwood_SP-940_user.pdf
sP-g40 SPEAKER Were happy that youve chosen the Model SP-940 for your receiving needs. lt has undergone stringent quality control inspection and tests prior to packing and has left our factory in perfect operating condition. Please inspect your SP-940 caref ully for any signs of damage in transit. If the unit is damaged, immediately notify the sales repre- sentative from whom you purchased the unit. I G E N E R A L Your SP-940 is a sophisticated external speaker designed to f u rther enchance operation of H F Transceivers. lt fea- tures precise audio response and matches the Trio-Kenw- ood H F transceiver in appearance. lts advantages are: it Built-in selectable tone filters to attenuate high or low f req uency response in puts; )F Two channel selectable input and the headphone output th rough the tone f i lters. I CONTROLS AND THEIR FUNCTION F ront Panel e PHONES connector Standard headphone output, through the tone f ilters. TNPUT Switch Selects one of two audio inputs. FILTERS, HIGH 1 Switch Th is switch attenuates f requencies above 3.0 k1z; -3 dB at 3.0 kHz. FtLTEFtS, HtcH2. This switch attgluates t*_qgeryiqq_ab_ove 1,?_KHz; *3 d B at 1.2 kHz. FtLTERS, Low Switch This switch attenuates f requencies below 400 Hz; -3 dB at 400 Hz. Note: When th is switch is used with the H lG H 1 and HIGH 2 ON, frequencies above 900 Nz; -3 dB at 900 Hz a re atten uated. REAR PANEL C INPUT connectors I SPECI F ICATIONS Speaker used: Rated Input: lmpedance: F requency response : 10 cm dia. 1 Watts B o 160 Hz ta 7 kHz. W. 180 mm (7-1 116) H. 140 mm (5-t l2l D. 2BB mm (1 1-113) 1 .9 ks. (4.2 lbs. ) Speaker cord, 1 pc. (E30- 1711-1 5) l pin plug, 1pc. (E14-0101-05) F ilter cut-off f requency, 400H2, -3d B, 3.0 k Hz, -3d B 1.2 kHz, -3d8. H IGH 1 + H IGH 2: 900H2, -3dB. Filter attenuation: -6dB/oct. LOW: H I G H 1 : HIGH 2: Dimensions: Net weight: Accessories fu rn ished : I PACKING Please save the shipping cartons and packing material. They have been designed for the safe shipping of your unit. There wil I be considerab ly less chance of damage if you ship your unit in its original cartons and pack ing. Accepts audio output LINE OUT connector Standard line output SSTV , or similar use. f rom two sou rces. th rough the f ilters f or RTTY, T FRONT FEET The front panel can be elevated by extending the front feet. Turn the front feet left and pull Then turn right to lock. for operating convenience down. USING COMBINED FILTERS 1. When both HIGH 1 and LOW filters are engaged, the pass bandwidth ranges from 400 Hz to 3.0 kHz. 2. When both H I G H 2 and LOW f ilters are engaged, band- width is 400 Hz to 1.2 kHz. 3. HIGH 1, HIGH 2 and LOW filters are engaged, band- width is 400 Hz to W0 Hz. 400H2 eg0t_lz I ZkAz 3.0kHz HIGH HIGH I-IGH 1,2 2 1 I USE OF FILTERS In general, it is desired that a CW, AM, or similar trans- mission be received clearly within the usual communica- tion audio bandwidth, 300 Hz ) 3 kHz. However, ORM, OR N or R F I may lower the overall signal-to-noise ratio at the receiver, resulting in degraded reception. In theory, as the pass-band width of the IF stages is nairowed, the equi- valent noise bandwidth will also narrow, thus improving the signal-to-noise ratio. Alternately, the bandwidth of the AF stage can be narrowed to attenuate the noise component, enhancing reception. Proper filter selection depends on transmission mode and type of noise encountered. 1. SSB: use the HIGH 1 and LOW filters, or the HIGH 2 and LOW f ilters. In more severe cases, use both H IGH 1 + HIGH 2, and LOW filters. 2. CW: use the HIGH 1 and HIGH 2 tilters or HIGH 1 + HIGH 2 and LOW in combination. IN PUT -r-A I - t-l LINE OUT FlLTERS ItiI PUT HIGH I I sr-l PHONES Ht6H z l-*-l L O W tr4-l SPEAKER 8 n KENWOOD CORPORATION Shionogi Shibuya Building, 17-5, 2-chome Shibuya, Shibuya-ku, Tokyo 150 Japan KENWOOD U.S.A. CORPORATION 2201 E. Dominguez street, Long Beach, california g0g1o u.s.A. KENWOOD ELECTRONICS DEUTSCHLAND GMBH Rembrucker Str. 15, 6056 Heusenstamm, West Germany KENWOOD ELECTRONICS BENELUX N.V. Mechelsesteenweg 418 B- 1 930 Zaventem, Belgium KENWOOD ELECTRONICS AUSTRALIA PTY. LTD. (tNcoRPoRATED tN N.S.W.) 4E. Woodcock Place, Lane Cove, N.S.W. 2066 Australia C, lb8ob pRINTED tN JAPAN Bs0-8006-30(KM ) O TURN LEFT PULL DowN LocK RIcHT HIGH I rtGH 2 LOW
