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Contents J Page 1 1. Description ...................... 1.1 Model SK 1008 Mikroport Transmitter. . . . . . . . . . . . . . . . . . 1.2 Microphones ,... 1.3 Model EM 1008 Mikroport Receiver. . . . . . . . . . . . . . . . . . . . . . 1.4 Antennae . . . . . . . . 1 2. Preparing equipment for operation. . 2 2.1 Transmitter.................. 3 2.2 Microphones ,... 4 2.3 Receiver.................... 5 2.4 Antennae ,. 5 3. Operation........................ 5 3.1 Transmitter.................. 6 3.2 Micr
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where there is a high ambient noise Power for these microphones is obtained 1. Description level, reverberation, or the possibility of from the Mikroport transmitter battery. The SM 1008 wireless microphone acoustic feedback, it is recommended system consists of a battery-operated that the Model MD 4008 plug-in micro- miniature transmitter, Model SK 1008, 1.3 Model EM 1008 Mikroport phone, which has super-cardioid di- which can be equipped with several receiver rectional characteristics be emplo
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,... If the micraphone spacing is increased, come to rest in the green section, (or if loudness is reduced), It will be indicating an adequate signal is present. necessary to advance the control ac- Advancing the volume control enables i cordingly, while loud speech or a the transmitted signal to be monitored I reduction in micraphone distance re- by means of the built-in loudspeaker. quires a lower setting. To facilitate precise matching of the system in studio This output signal is available f
ページ5に含まれる内容の要旨
more receivers to be operated in the input, an additional balanced, ungroun- 4.3 Special frequencies diversity mode. ded output voltage of 2 mV, with a While the standard carrier frequencies source impedance of 10 ohm, is avai- Since it is highly unlikely that field are set to 36.7 and 37.1 MHz, the lable at the contacts 2 and 4 of the strength minima will occur simultane- system can also be supplied with any 'output' socket. This output can be ously at two different antenna sites, two frequenci
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36.7 and 37.1 MHz Carrierfrequencies, switchable. . . Technical I Frequency drift at temperatures Data between + 68° F (+ 20° C) and + 113° F (+ 45° C) and an ope- 111: SK 1008 < 15kHz rating voltage deviation of 200/0 ~) I111 Radiated output. . . . . . . . . approximately 1mW 1]11 1I ,I FM Type of modulation. . . . 1111 ~ 100 cis Noiseswing. . . . . . . . . . . I111 1 mV/40 kHz swing AF input sensitivity(variable) . . . I1I1 I 35 Hz - 20 kHz Transmissionrange:!: 3 db . . . . " 50 ,usec Pre-emph
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60 Hz - 14 kHz Response.. . . . . . . . . . . Technical Maximum deviation from specified frequency response (for lavalier :!: 3 dB Data microphone) ......... Field no-load transmission factor at MD 1008 1000Hz. . . . . . . . . . . . 0.2 mV/l-tbar 400 ohms Electricalimpedance. . . . . . . (I Directional characteristic . . . . . spherical 1.6" x 1.7" x 1.3" Dimensions . . . . . . . . . . . 0.24Ib. Weight.. . . . . . . . . . . . . unbalanced, for 60-ohm source impedance, InputI. . . . . . 13 mm RF
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Signal-to-noise ratio at 40 kHz swing EM 1008 and more than 50 pV antenna > 65 db voltage. . . . . . . . . . . . . . . . . 36.7 and 37.1 MHz in accordance with the Reception frequencies transmitter :t 100 kHz Pull-in range of automatie tuning ~) Adjacent channel rejection with > 60 db 0.4 MHz channel spacing Electronic squelch circuit; Adjus- 2 p,V - 1 mV (Indication by field strenght table cut-off antenna voltage. . meter) 2 or more receivers can be connected to each Diversityoperation. . . . .
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tor 50-ohm sources Input (unbalanced) . . . . . . . . Technical internal resistance 1 K; . . . . . . . Output (unbalanced) nominal loading 2 K Data Output voltage with 40 kHz swing T203 and more than 5 f-lVantenna vol- 1 V, variable tage. . . . . . . . . . . . . (Oi 100 - 15000 Hz Audio-trequency range. . . . . . Deviation trom specitied trequency ;;;; :!: 2 dB response (De-emphasis 50 usec) Non-linear distortion at 40 kHzswing and 200 f-lVantenna voltage tor ;;;;3% 1 V output voltage. . . . . .
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80 to 12,000 Hz Frequency response. . . . . . . Technical Maximum deviation from nominal Data :t 3 db curve ,. MD 4008 Field no-load transmission factor at 1000 Hz ,..... .2 mV/,ubar 0) 700 ohms Electrical impedance . . . . . . . Directionalcharacteristic . . . . . super cardioid . . . . . . . 1.6" x 1.7" x 1.3" Dimensions .24Ibs. . . . . . . . . . . . . . Weight 11 111 11 1I 1 11 11 111 1 11111 11: : 111 1 11I1 .») I I 111:1 111111 iIIill 11111I 11111.1 111\i\ 12 11I111 III!I: 1',1111 11' - I
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