4
(B) S.R.L. (Standard Recording Level)
1. The Standard Recording Level is a signal of 250nWb/m
on a tape at *OPEN CIRCUIT MAGNETIC FLUX.
The relation between the recording level and a test tape
is as follows.
• OPEN CIRCUIT 160 185 200 220 250
MAGNETIC FLUX
(nWb/m)
• CLOSED CIRCUIT 160 185 200
MAGNETIC FLEX
(nWb/m)
**
***
(*): OPEN CIRCUIT MAGNETIC FLUX = CLOSED
CIRCUIT MAGNETIC FLUX + LEAK
MAGNETIC FLUX.
(**): TCC-130 (DOLBY REFERENCE LEVEL)
(MTT-150)
(***): TCC-120 (IEC REFERENCE LEVEL) (S.R.L.)
(MTT-212N)
2. S.R.L. Setting
1) Apply a 1kHz, 100mV to the LINE INPUT jacks.
2) Put the unit in RECORD mode and adjust the REC
LEVEL control to obtain the following level of signal at
the DOLBY test points T601 (L), T602 (R) 300mV.
3) Adjust the output of the audio oscillator applied to the
LINE INPUT jacks to 112.2mV (+1dB). This is the rated
recording condition for the STANDARD RECORDING
LEVEL.
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