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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。. a! ?# r( B4 D% k8 Q
各项指标如下:
2 |5 N" \$ i5 k9 a- I; y; r0 k; K3 Z0 l( v
Track System….4 Track 2 Channel Stereo System
8 A( \, D b! G1 u3 T; y8 g0 W4 ~Reel Capacity....Up to 10” Reel |5 z, H! ?6 }: \/ V
Heads....
& I4 }; D- |2 h5 ~% ZGX head for recording x 2;
% C3 ~( k$ l/ {GX head for playback x 2;
! C2 A$ C& g8 v2 s. F: ^Erase head x 2 ) D) ^; X7 U8 |* Y: Y6 y' U; z
Motors....9 y; n# \% P1 f- n3 X3 P( \ M0 x
AC Servo motor for capstan drive x 1;
* i2 y, k5 L8 B+ j' ^3 y% {AC Eddy current motor for reel drive x 2
& U$ }+ I6 y Q: ~" Q$ O! Y) xTape Speed....
$ Y9 Q& j, r( m19 cm/s +0.8% (7 ½ ips.); 4 E/ P" H" l v8 z9 i! v
9.5 cm/s +1.0% (3 ¾ ips.)
1 Y" t7 R: Y, |0 K! u) Y) Y5 {Wow and Flutter....
. x2 `- F6 {1 z. q7 q' P$ X9 P H) E# SLess than 0.03% WRMS at 19 cm/s;
5 k5 e: _+ r5 {0 t+ b9 \3 N/ |Less than 0.04%WRMS at 9.5 cm/s 1 p9 z7 ?) o2 S
Tape Winding Time....75 sec. using 360 m (1,200 ft.) Tape
/ Q+ N3 d ~" ?( ]Frequency Response....' v2 y, ~# a/ @5 Z( D0 o
25 to 33,000 Hz +3 dB at 19 cm/s;
3 g7 g' U' i/ k7 E7 J25 to 26,000 Hz +3 dB (0 VU); 3 p% v. x p; H. U2 j1 u
25 to 33,000 Hz +3 dB at 9.5 cm/s; & F/ M/ R3 z! D" j9 b
25 to 15,000 Hz +3 dB (0 VU)
0 L! f4 P/ m Z0 GSignal to Noise Ratio....Better than 65 dB (19 cm/sec dbx switch: OFF) , q$ h# O" \- J0 a$ M/ i
Dynamic Range....128 dB (dbx switch: ON, 1 kHz, peak recording level)
. o$ }2 c. y9 Q: [, [Harmonic Distortion....Less than 0.4% at 19 cm/s
! f, V& y5 k5 jInput....
& q6 |! I" R0 l- X, ^MIC: 0.25 mV; Required microphone impedance: 600 ohms;
5 u# O" o# M" }2 ^+ Y5 yLine: 70 mV
: c) i! h! {! x. l: l6 g3 BOutput....7 {1 d4 {8 b$ A6 O
Line: 410 mV;
( Z8 ^7 \5 M+ J! qPhone: 1.3 mW
+ ]0 M) O3 s2 [: ]Power Requirements....110V, 120V, 220V, 240V; 50/60 Hz switchable 8 c m D; n1 T; n F/ v
Dimensions...440 (W) x 493 (H) x 256 (D) mm; (17.3 x 19.4 x 10.1 inches) " N$ e Y+ g% w% s
Weight....23.2 kg (51.0 lbs) |
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