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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。
' E1 I g& M0 T' M各项指标如下:' S h+ D8 t! U0 \
( E3 f; E3 F( Y I+ v& LTrack System….4 Track 2 Channel Stereo System . a0 s) A, W1 K: T
Reel Capacity....Up to 10” Reel % Y- I4 B) n# C1 k( s
Heads....7 `% B' {) g) W8 _# t3 A+ F" o$ A
GX head for recording x 2; 9 {" [+ c" z( n6 E/ Y* X
GX head for playback x 2; ! _5 ^1 Y: ]4 t
Erase head x 2
+ J4 d; C3 o' w" pMotors....
$ J$ |! n b1 ], FAC Servo motor for capstan drive x 1; : I! U @' m( l7 r& a
AC Eddy current motor for reel drive x 2 2 [" n1 I% o& t2 \9 m9 I
Tape Speed....+ [% Y# |& ?5 f9 @
19 cm/s +0.8% (7 ½ ips.); ) j6 Z' O3 n/ x7 V/ V; S
9.5 cm/s +1.0% (3 ¾ ips.) 3 H% Y# P8 q( d& w9 j; `' Q: ?
Wow and Flutter....- Q# ^5 T. z8 @( V
Less than 0.03% WRMS at 19 cm/s;
+ Q- X: g7 z" W8 A, ^6 p# uLess than 0.04%WRMS at 9.5 cm/s
8 W) f m6 F6 e2 BTape Winding Time....75 sec. using 360 m (1,200 ft.) Tape & ^7 S4 ]: Z9 b4 {. s& E3 B
Frequency Response....$ k& M; x: e; N' A4 P* i1 f
25 to 33,000 Hz +3 dB at 19 cm/s;
! G; e, f$ V2 r) z6 ? w! y* m* N25 to 26,000 Hz +3 dB (0 VU);
- J% D3 a S4 X3 ~, w- A25 to 33,000 Hz +3 dB at 9.5 cm/s;
7 b- o2 t' h! C25 to 15,000 Hz +3 dB (0 VU) $ g0 l# b5 H/ ], ]6 o& c
Signal to Noise Ratio....Better than 65 dB (19 cm/sec dbx switch: OFF)
. t3 V$ U, G. I' n' _1 A& O0 s5 @Dynamic Range....128 dB (dbx switch: ON, 1 kHz, peak recording level)
F- x8 ]: _, U2 j) ?5 ]2 M N+ gHarmonic Distortion....Less than 0.4% at 19 cm/s $ ^- m1 F& ^2 k" u3 G! s. _# \
Input....3 e% c+ X4 w/ ?0 I6 h( h
MIC: 0.25 mV; Required microphone impedance: 600 ohms; 6 h% l1 y K& j" E
Line: 70 mV
. V9 s5 j0 E# L. V3 ~Output....& D! i4 [& `0 d/ O
Line: 410 mV; 7 }4 Y( b4 j/ v* |/ P |: }
Phone: 1.3 mW
4 _" E' J, {. ~: b* S; Q: APower Requirements....110V, 120V, 220V, 240V; 50/60 Hz switchable 6 x" H% H4 L% u0 H/ B! p
Dimensions...440 (W) x 493 (H) x 256 (D) mm; (17.3 x 19.4 x 10.1 inches) / _$ w5 \3 x3 q$ k7 W
Weight....23.2 kg (51.0 lbs) |
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