8 m m
/3(NTSC)
VHS(NTSC)
Remarks
NTSC PAL
(3\\ /Sill
SP EP
Remarks
Linear A u d i o
Option
Standard
Standard
Dubbing possible
Frequency response (Hz)
5 0 - 8 K
5 0 - 1 0 K 5 0 - 8 K 5 0 - 1 0 K 5 0 - 7 K
Depends on tape speed
Dynamic range (dB)
4 7
4 0
Distortion (%)
5
5
W / F (%)
0.3 0 . 4
0 . 4
Hi-fi Audio
Standard
Option
Option
Dubbing possible
Recording system
VHS requires audio heads
Carrier
1 -carrier (Mono)
4-carrier (Stereo)
2-carrier (Stereo)
(3 requires 4
Carrier frequency (MHz)
1.5
L: 1.38 L: 1.53
R: 1.68 R: 1.83
L: 1.3
R: 1.7
Carriers t o avoid cross
talk.
M a x i m u m frequency deviation (kHz)
± 1 0 0
± 7 5
± 1 5 0
Frequency response (Hz)
2 0 - 1 5 K
2 0 - 2 0 K
2 0 - 2 0 K
Dynamic range (dB)
6 5
8 0
8 0
Distortion (%)
0 . 3
0 . 3
0 . 3
W/F (%)
0 . 0 0 5
0 . 0 0 5
0 . 0 0 5
PCM Audio
Option (Capable of 2 4 H recording max.)
Dubbing possible
Recording system
Sampling frequency (KHz)
3 1 . 4 6 9 (2f
H
) NTSC) 3 1 . 2 5 ( 2 f n ) ( P A L )
Quantization
10 to 8 bits compression
Transfer rate
3 6 8 f H ( 5 . 7 9 0 M bit 1 sec)
Error correction
Cross Interleane Code (8 w o r d s , 2 parities)
Error detection
CRCC (16-bit)
Modulation
Biphase mark
Frequency response (Hz)
2 0 ~ 15K
Depends on sampling freq.
Distortion (%)
0.3
W / F (%)
0 . 0 0 5
Dynamic range (dB)
8 0
* Dubbing: A d d i t i o n of sound t o a prerecorded tape
Table 2 Specifications of the Three Systems (Audio)
8 m m
0
VHS
Threading
Tape-end detection (leader tape)
Erase head
Tracking
U
(U/M compatible)
Transparent tape
Flying erase (Frame by frame)
A u t o m a t i c Track Finding
(Tracking VR unnecessary,
stable tracking)
U
(Quick function-selection)
A l u m i n u m tape
Full erase
Control head
(Tracking VR necessary)
M
(Threading length is short but
t w i s t i n g is large.)
Transparent tape
Full erase
Control head
(Tracking VR necessary)
Table 3 Specifications of the Three Systems (Others)
29
