W-600R/W-488R
5
2-2-4 Recording performance
Deck settings:
TEAC recording test tapes:
Mode: REC/PLAY
MTT-5513 : For NORMAL
DOLBY NR Switch: OFF
MTT-5563 : For CrO
2
REC LEVEL Control: Specified position (Item 7)
ITEM
SETTING
INPUT SIGNAL
( LINE IN )
ADJUSTMENTS
MEASURING
POINTS, RESULT
REMARKS
7. Specified
LINE input
level
Connection: Fig. 2-3
Mode: REC
400Hz/
−
9dB
REC LEVEL
OUTPUT:
Lch:
−
3.5dB
Rch:
−
3.5
±
3dB
After adjusting, do
not move
(Specific position)
8. Bias osc
frequency
Connection: Fig. 2-2
TAPE: MTT-5513
Mode: REC
No signal
L301
P303 Pin 2:
75
±
5kHz
15. Erase
efficiency
Connection: Fig. 2-3
TAPE: MTT-5563
1kHz B.P.F in
1kHz/
＋
1dB
Check
65dB min.
Ratio of the 1kHz
recorded portion
to the erased
portion.
9. Record bias
Connection: Fig. 2-3
TAPE: MTT-5513
250Hz/10kHz
−
42dB
R14/R24
OUTPUT:
Nearly equal level
at both frequencies
(
±
0.5dB)
10. MPX filter
Connection: Fig. 2-3
Mode: REC
19kHz/
−
12dB
L101/L201
30dB min.
Ratio of ref.
level to signal
11. Record level
Connection: Fig. 2-3
TAPE: MTT-5513
400Hz/
−
12dB
R13/R23
OUTPUT:
−
6.5dB
12. Total
harmonic
distortion
Connection: Fig. 2-3
TAPE: MTT-5513
MTT-5563
400Hz/
−
12dB
Check
NORMAL: 2.0% or less
CrO
2
: 2.5% or less
TAPE: MTT-5563
Check
OUTPUT:
−
6.5
±
1dB
13. Overall
frequency
response
Connection: Fig. 2-3
TAPE: MTT-5513
MTT-5563
40Hz
−
12.5kHz
−
42dB
Check
14. Overall S/N
ratio
Connection: Fig. 2-3
TAPE: MTT-5513
MTT-5563
No signal
Check
40dB min.
Ratio of ref.
level to noise
16. Channel
separation
Connection: Fig. 2-3
TAPE: MTT-5563
1kHz B.P.F in
Lch: 1kHz/
−
9dB
Rch: No signal
Check
35dB min.
Ratio of Lch
(1kHz) to Rch (no
signal).
17. Adjacent
track
crosstalk
Connection: Fig. 2-3
TAPE: MTT-5563
Lch: No signal
Rch: 125Hz/
−
9dB
Check
40dB min.
Invert tape and
play Rch track.
Check leakage
level against the
output reference
of previously
recorded portion.
40
250
12.5k (Hz)
+
6dB
– 6dB
