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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。
6 N. d% w) C0 R" \7 B* g8 T各项指标如下: W+ e- r* H8 L5 _! g
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Track System….4 Track 2 Channel Stereo System
% Y% m h/ \5 ]$ |Reel Capacity....Up to 10” Reel 7 ~& v8 w3 Q/ I
Heads....
" O+ o+ ]" r" L! }' OGX head for recording x 2;
6 f8 ^7 \2 n4 y1 [9 iGX head for playback x 2; ' _7 v: m$ c; F, e! {: A
Erase head x 2 m3 G# |8 d# U1 c, m% C
Motors....9 l6 f. B5 a' C% a$ [
AC Servo motor for capstan drive x 1;
" T2 z ^( k, ^" vAC Eddy current motor for reel drive x 2 3 R3 c- @* ^8 u/ m/ ?+ w' B
Tape Speed....
) m8 F j& i( C, ~ U. Y19 cm/s +0.8% (7 ½ ips.);
0 t" U1 r$ t! E9.5 cm/s +1.0% (3 ¾ ips.)
}. \+ B' H- h) LWow and Flutter....
$ ?& [7 S& |. zLess than 0.03% WRMS at 19 cm/s; 1 N2 m& a: L7 S4 G, j0 C5 Y
Less than 0.04%WRMS at 9.5 cm/s 2 N+ y4 N1 ?5 f3 Q* m8 u% j: e
Tape Winding Time....75 sec. using 360 m (1,200 ft.) Tape % o6 U7 Z. ]0 ^6 `- e
Frequency Response....: n% Q# l: r4 ?$ l0 R
25 to 33,000 Hz +3 dB at 19 cm/s;
* F6 \: ]0 d' P! j/ G25 to 26,000 Hz +3 dB (0 VU); 5 @( t, s2 K2 n5 L
25 to 33,000 Hz +3 dB at 9.5 cm/s; ) C C# J+ l p. C7 r5 l
25 to 15,000 Hz +3 dB (0 VU) ! D( Z+ O- Q+ c- U7 V
Signal to Noise Ratio....Better than 65 dB (19 cm/sec dbx switch: OFF) 1 D% y! h9 Y4 ~' ^9 E% [7 T, D# n! C
Dynamic Range....128 dB (dbx switch: ON, 1 kHz, peak recording level)
; s0 V) a% Z, w; u4 \) EHarmonic Distortion....Less than 0.4% at 19 cm/s
/ L$ l. m: F$ n; D$ ^. i7 yInput....& r, `: K; |7 T- K+ V0 F
MIC: 0.25 mV; Required microphone impedance: 600 ohms;
9 L; L5 O3 J7 R/ R2 z/ }Line: 70 mV
3 i+ i! K9 p: F" |Output....$ a8 ^$ ]! ]3 O8 r9 q# A' G
Line: 410 mV; $ m: L! C" n$ s
Phone: 1.3 mW 0 i- U: s3 E4 ^) G: Y- g
Power Requirements....110V, 120V, 220V, 240V; 50/60 Hz switchable
2 I ?4 R2 [, @. e& S$ \4 DDimensions...440 (W) x 493 (H) x 256 (D) mm; (17.3 x 19.4 x 10.1 inches) 6 {0 A" \9 I7 ]- i$ p
Weight....23.2 kg (51.0 lbs) |
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