Marantz SD4050 /N1B Service Manual page 9

ITEM SETTING
17. Erase
Connection:Fig. 2-3
efficiency
TAPE: MTT-5572
1kHz B.P.F in
18. REC MUTE
Connection:Fig. 2-3
function
TAPE: MTT-5572
REC MUTE
1kHz B.P.F in
19. Channel
Connection:Fig. 2-3
separation
TAPE: MTT-5563
1kHz B.P.F in
20. Adjacent
track
Connection:Fig. 2-3
crosstalk
TAPE: MTT-5572
Fig. 2-4
INPUT SIGNAL ADJUSTMENTS
LINE IN:
Check
1kHz/+1dB
LINE IN:
Check
1kHz/+1dB
LINE IN:
Lch 1kHz/
-9dB
Check
Rch No signal
LINE IN:
Lch No signal
Check
Rch 125Hz/
-9dB
Fig. 2-3
9
MEASURING
REMARKS
RESULT
Ratio of the 1kHz
recorded portion to the
65dB min.
erased portion.
Ratio of the 1kHz
recorded portion to the
"REC MUTE" portion.
55dB min.
Ratio of Lch (1kHz) to
Rch (no signal).
35dB min.
Invert tape and play Rch
track. Check leakage
level against the output
reference of previously
40dB min.
recorded portion.
Fig. 2-5