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发表于 2010-12-7 18:06:02
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GX-747个人认为非常漂亮,在民用级别上完全满足要求了,有待DBX版本的,可惜上次没有拍到,只好退而求其次,GX-646本人也非常喜欢。! ]7 M( {) y% G/ a* \7 ]3 l
各项指标如下:" v c. x+ K: u S" r+ E8 _
. X9 b! B% d9 q0 U# ?1 K" aTrack System….4 Track 2 Channel Stereo System 0 E* v _5 c/ S8 h
Reel Capacity....Up to 10” Reel
0 a+ b' ^0 D! qHeads....
4 } r" T% P3 T. r9 oGX head for recording x 2; ( g K& \. X; C; o7 a" h
GX head for playback x 2; 7 f2 l; g: }& I8 k( ^
Erase head x 2
' R4 I4 C* h: I! QMotors....
" z. g3 S" m( B" O o' L* GAC Servo motor for capstan drive x 1;
2 M( l. Q+ e" S4 \AC Eddy current motor for reel drive x 2 0 r& l' J9 ]* V3 r2 L' u. `4 r
Tape Speed....
( ~3 h; a6 e+ T2 z2 e19 cm/s +0.8% (7 ½ ips.); / [! c6 C7 a; {& O$ d+ I# z
9.5 cm/s +1.0% (3 ¾ ips.) $ G; t2 l f+ X6 s
Wow and Flutter....' }9 `* Y9 T/ D# j5 J
Less than 0.03% WRMS at 19 cm/s;
+ i' u" _2 C3 r- q6 f; D5 vLess than 0.04%WRMS at 9.5 cm/s
9 [% D! k$ J% D! q- wTape Winding Time....75 sec. using 360 m (1,200 ft.) Tape 6 v r' T, h$ U6 d5 W. s" E$ e. g
Frequency Response....3 p* c4 Y5 |, ]' p) d/ H- p
25 to 33,000 Hz +3 dB at 19 cm/s; + s# p- E6 l$ b* a% D
25 to 26,000 Hz +3 dB (0 VU);
0 ?$ x" x" ?6 f4 j* P8 U W25 to 33,000 Hz +3 dB at 9.5 cm/s;
7 S& l) O* O- i25 to 15,000 Hz +3 dB (0 VU)
. |% X ?( [' k' \Signal to Noise Ratio....Better than 65 dB (19 cm/sec dbx switch: OFF)
$ n! O5 Q* G8 Z0 S! E. o7 NDynamic Range....128 dB (dbx switch: ON, 1 kHz, peak recording level) . c8 p: Q( ^7 \ C$ b0 X9 \
Harmonic Distortion....Less than 0.4% at 19 cm/s
. e& Y: ^1 v4 N1 ~/ N4 |Input....
) V2 I5 D( d7 M1 y2 A! }8 YMIC: 0.25 mV; Required microphone impedance: 600 ohms;
: h6 c% }& e' \% w0 |) mLine: 70 mV
5 U) p8 D4 e1 P- _: X* ?Output....) _; W6 \& I- f8 Y( g% p( K
Line: 410 mV; 7 x3 c: |" `* y
Phone: 1.3 mW % l g" s9 `& g8 d
Power Requirements....110V, 120V, 220V, 240V; 50/60 Hz switchable
: B! V6 p/ Y- j6 h$ g0 C2 C& _" WDimensions...440 (W) x 493 (H) x 256 (D) mm; (17.3 x 19.4 x 10.1 inches)
4 v1 p5 \1 Y, a* z5 l% {Weight....23.2 kg (51.0 lbs) |
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