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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。
( M/ ?7 C, J; p+ ~8 E$ Q" X各项指标如下:; s% m; ?* u0 u# Y' Y# D8 \
5 B: a6 M# c* O$ dTrack System….4 Track 2 Channel Stereo System ( D' n3 d: b! C% p; r
Reel Capacity....Up to 10” Reel
- e6 `# X" J6 y) KHeads....
4 [. b: Z! P! h4 sGX head for recording x 2; - Q% {& H/ ?# n$ f0 M
GX head for playback x 2;
$ w; L0 m1 W3 l$ Q* |Erase head x 2
% u) @4 v' U& M& }% M3 v1 n8 SMotors....8 Q0 Y9 A# o$ Z1 _* x# j
AC Servo motor for capstan drive x 1; ! c. J1 Y0 E: J7 o2 F; `
AC Eddy current motor for reel drive x 2
7 g, K8 |) p: d3 S1 ZTape Speed..../ T( l* Q: W& o3 n/ B* R
19 cm/s +0.8% (7 ½ ips.);
$ y' d" S; ~& Q9 j; M! E9.5 cm/s +1.0% (3 ¾ ips.)
% Q! v( S* r5 ^4 b4 C" g, WWow and Flutter....
; X {! D+ U$ v* S( L" t) t% KLess than 0.03% WRMS at 19 cm/s;
! D4 K4 c# _6 `" C. \6 N: uLess than 0.04%WRMS at 9.5 cm/s
: p3 A; n4 h# G( a2 |4 \Tape Winding Time....75 sec. using 360 m (1,200 ft.) Tape 1 @1 ] U/ \$ T. c+ ^( k
Frequency Response..../ R h' p. }0 ]
25 to 33,000 Hz +3 dB at 19 cm/s; 9 a% I+ Z- J0 y* h
25 to 26,000 Hz +3 dB (0 VU);
* I7 ` `& e+ H- i' c25 to 33,000 Hz +3 dB at 9.5 cm/s; 2 h! b: u- ]( j3 b5 ]! K+ H+ H, C
25 to 15,000 Hz +3 dB (0 VU)
# Y; A, X7 \0 u2 c( ZSignal to Noise Ratio....Better than 65 dB (19 cm/sec dbx switch: OFF) - U; B/ u. k9 d' { x2 p3 r) F3 l; x8 R' m
Dynamic Range....128 dB (dbx switch: ON, 1 kHz, peak recording level)
5 X' E# v3 ~4 r) f9 M+ {3 QHarmonic Distortion....Less than 0.4% at 19 cm/s ; ~9 t# C7 d% j
Input....
& ]+ V2 d* Y1 F: G% d# yMIC: 0.25 mV; Required microphone impedance: 600 ohms; ; [9 R6 f( H3 z4 o& l, C% I
Line: 70 mV
+ S4 G' L) K% C! j$ FOutput....
p9 f5 i/ z0 ^. w) b* \7 ^2 j0 T" WLine: 410 mV;
0 x( \$ G! t7 C1 S Q' X: S* `Phone: 1.3 mW # X+ f0 `+ T7 B& C. |! r
Power Requirements....110V, 120V, 220V, 240V; 50/60 Hz switchable
' W; o) W" e% q- V3 M3 y. n2 zDimensions...440 (W) x 493 (H) x 256 (D) mm; (17.3 x 19.4 x 10.1 inches)
. T* \. {1 n( {8 [& V) L, J3 T! k9 {Weight....23.2 kg (51.0 lbs) |
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