SM-SX1/SX1W
– 8 –
ADJUSTMENT
Measure the noise distribution between the set output terminals (Lch+, Lch- and Rch+, Rch-), and adjust VRA1 to VRA4. The VRA
adjustment sequence is the same as that of the offset voltage adjustment.
Measuring instrument: Yokokawa Electric brand SA2400
Measurement range : Refer to Fig. 8-2.
Adjustable range:
1
250Hz to 100kHz within ±3dB from the standard noise curve
2
(Noise strength of 125Hz) — (Noise strength of 250Hz) 20dB
AC POWER
SUPPLY
UNIT
Specterum
Analyzer
Speaker terminal
Apply the analyzer between Lch+ and Lch-,
and between Rch+ and Rch-.
Figure 8-1
Standard noise floor curve
(Frequency range 1)
Figure 8-2
20dBV
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