Technics RS-TR474 Service Manual page 10

RS-TR474 |
Mi ABOUT THE ATC FUNCTION
The ATC (auto tape calibration) function records a test signal in
order to automatically set the bias, equalizer and recor-
ding/playback level to the optimum recording conditions in accor-
dance with the characteristics of the tape being used.
The table below shows the conditions of the display and the
operation of the unit while the ATC settings are being made.
The bias is adjusted so that the output level is the same
at 400 Hz and at 10 kHz.
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3 eX
"BIAS" is cespiayed. | = vo'
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a
a 0 Left Seaseebecscecacacst eee seece Westaness
7 - ' 400 «K 3K tox Frequency
@ Bias adjustment
(Hz)
"EQ" is displayed.
Output fevel (dB)
@ Equalizer adjust- F ox Frequency
ment uanrannannit (Hz)
3 moO
SCUBSEDSUUBESEOGTE
Flash The equalizer is adjusted so that the output
rnee level is the same at 400 Hz and at 3 kHz.
"LEVL" is displayed.
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2
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3
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Frequency
oO
T ' '
@) Level adjustment
L SOUeRaeanusaags
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De AUTLAAAERUDRSASRCOUCERSUSENEES ESSE
The tape sensitivity is compensated so that the
recording input level and the playback output
level are the same. ;