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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。
5 U# y2 R& N3 f5 `# T各项指标如下:
$ d* |- ?, Q0 Y5 k9 ?/ g/ Z+ A0 U' ?( E7 c( r/ F2 B" W- ^+ R
Track System….4 Track 2 Channel Stereo System
/ J a6 r' J+ i$ k. ?Reel Capacity....Up to 10” Reel
0 w9 [5 F' x: j" sHeads....
9 t) w" |; ~8 d( s) rGX head for recording x 2; 2 b$ F5 s3 ?4 _3 V! z7 |7 r
GX head for playback x 2; 2 x* z5 |. ^8 g9 J4 ?
Erase head x 2 $ B2 X0 } R8 o8 x8 M0 r; V' z7 b
Motors....
% @/ \9 j2 g, O# y* yAC Servo motor for capstan drive x 1;
( M0 I# v/ _7 i8 F @& e. O0 X4 _AC Eddy current motor for reel drive x 2
; T2 ] ~- a" }! _( U( ?7 ^Tape Speed....
. \3 O) q( N! j' z% D+ D$ r19 cm/s +0.8% (7 ½ ips.); * J* `$ q% O5 N& Q9 D
9.5 cm/s +1.0% (3 ¾ ips.) . d5 ?: z6 k; X5 m4 J
Wow and Flutter....
0 v0 W, {' m; u$ n# I7 |7 t) ILess than 0.03% WRMS at 19 cm/s;
- H, h& t8 R w" HLess than 0.04%WRMS at 9.5 cm/s
$ |$ ?8 m! l2 d9 rTape Winding Time....75 sec. using 360 m (1,200 ft.) Tape
# |5 _( w+ U: cFrequency Response....
) Z& R* y- A) G25 to 33,000 Hz +3 dB at 19 cm/s;
3 z% Q* Z* Y3 V7 r* R7 H25 to 26,000 Hz +3 dB (0 VU);
4 }; S f! T* a25 to 33,000 Hz +3 dB at 9.5 cm/s;
; {: s! O3 K0 D1 U v. s0 A25 to 15,000 Hz +3 dB (0 VU) $ @3 ]6 h- n3 |
Signal to Noise Ratio....Better than 65 dB (19 cm/sec dbx switch: OFF)
9 I) S7 x9 v6 UDynamic Range....128 dB (dbx switch: ON, 1 kHz, peak recording level)
; P9 X2 v) z3 H8 e8 VHarmonic Distortion....Less than 0.4% at 19 cm/s
- ]. i5 s% `: \6 }/ x MInput....
8 C, [* `1 N& Q6 u' vMIC: 0.25 mV; Required microphone impedance: 600 ohms; 8 s% r$ J$ l/ x) v+ Y2 e5 l
Line: 70 mV 1 V: ^9 w2 G0 s( Q, H
Output....- Y ~- c; p! h6 a2 q8 ]
Line: 410 mV; * Q$ T) Y* q: E5 @. f
Phone: 1.3 mW
: A" e" ` ?, Y! YPower Requirements....110V, 120V, 220V, 240V; 50/60 Hz switchable 2 z4 D' s6 b! q/ K* ]0 b
Dimensions...440 (W) x 493 (H) x 256 (D) mm; (17.3 x 19.4 x 10.1 inches)
( M6 U8 Z% L* ~# @Weight....23.2 kg (51.0 lbs) |
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