Marantz 75DC1010/1B - Page 20

@R#GEL NI (S.R_L)
1 F-TECRE BRR. 250nWb/m ORR & RRS
VRVOT ECHO, MEHVAVER-F¥-AF—-WEE
FAKF-TFOMRLAFODES OCT.
- IBLE (nWb/m) ............-- 160 185 200 220 250
* BRM - 9 - ATH. By EX = ae
- PALS (nWb/m) | ie ni |
Be eee
TCC-130 (DOLBY REFERENCE LEVEL) ~“""
(MTT-150)
S.R.L
(MTT-212)
Em :
(1) RAISER RGR = PAPA + RR
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FOLICROVET,
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Lit.
2) RECLEVEL (V€2¥Y) ©##LL Fre-#RAYh
L) T601, R) T602 CTO LNIVA300MV ETSEIITL
ET.
3) CORBPSADUAVE-4dBE LZ (FY FARO
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(ORL) CORBRETT »
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PCS 79 714
(B) S.R.L/Standard Recording Level
1. S.R.L (Standard Recording Level) which is 250nWb/m
on a tape by* OPEN CIRCUIT MAGNETIC FLUX. The
relationship among recording level, meter scale and test
tape are as follows:
OPENCIRCUIT 160 185 200 220 250
MAGNETIC FLUX | | | | |
(nWb/m)
* OURSTANDARD -4 -3 -2 -1 OdB
METER SCALE | | | | |
* CLOSED CIRCUIT 160 185 200
MAGNETIC FLUX | |
(nWb/m) * Kk ekeKK
(*); OPEN CIRCUIT MAGNETIC FLUX = CLOSED
CIRCUIT MAGNETIC FLUX + LEAK
MAGNETIC FLUX.
(*): O.R.L
(***): TCC-130 (DOLBY REFERENCE LEVEL)
(MTT-150)
(“**): S.R.L TCC-120 (IEC REFERENCE LEVEL)
(MTT-212)
2. S.R.L Setting As for sets, DOLBY LEVEL is usually
standard, it will be as follows:
Recording condition is to add 1 kHz, 100 mV signals on
LINE INPUT.
Adjust REC LEVEL (REMOTE CONTROL UNIT) and
should be 300 mV at DOLBY test points L/T601, R/T602.
From this condition, input level is —-4 dB (4 dB down by
attenuator). It is the recording condition at OPERATION
RECORDING LEVEL. (O.R.L)
(Note) Depending on measurement items, playing standard
level changes a lot. Recording level of specified test
tape decides the standard level.
1
~~
2
~—
3
=
(C) Adjustment Flow Chart
TAPE SPEED Adjustment
AZIMUTH Adjustment
PLAY-BACK LEVEL Adjustment
MPxX Filter Adjustment
BIAS FREQUENCY Adjustment
BIAS OSC Coil
REC/PB FREQUENCY Response Adjust.
NORMAL Tape
CrO2 Tape (Check)
METAL Tape (Check)
REC/PB LEVEL Adjustment
26