MSP5A
14
2. Muting operation
The pop noise which appears between the time of the relay when making a power switch into ON/OFF of operation and SP
terminal checks that it is the range of the following table for LF and HF.
(パワースイッチを ON/OFF にした時のリレーの動作時間と、SP 端子間に現れるポップノイズは LF、HF 共に下表の範
囲であることを確認します。)
3. Protection circuit operation
When DC+3V are impressed to the base of Q201 through 2.2k ohm, it checks that a relay is turned off immediately.
(Q201 のベースに 2.2k Ωを介して DC+3V を印加した時リレーが即、OFF になる事を確認します。)
When DC-3V are impressed to the base of Q202 through 2.2k ohm, it checks that a relay is turned off immediately.
(Q202 のベースに 2.2k Ωを介して DC-3V を印加した時リレーが即、OFF になる事を確認します。)
Noise output voltage
LF, HF SP-OUT
INPUT
Relay operation time
POWER SWITCH
Non-signal
(無信号)
(リレー動作時間)
(ノイズ出力電圧)
OFF
→
ON
3.0 – 1.5 sec
+1.5
-1.0
≦
0.1Vp-p
ON
→
OFF
1.0 sec
≦
0.1Vp-p
5
6
7
(残留雑音)
LEVEL VR = MIN.
HIGH SW: 0
LOW SW: 0
LF SP-OUT
DIN AUDIO Filter
HF SP-OUT
DIN AUDIO Filter
<
-70dBu
<
-70dBu
Noise level
Residual Noise
LEVEL VR = MAX.
HIGH SW: 0
LOW SW: 0
LF SP-OUT
DIN AUDIO Filter
<
-70dBu
MAX. NOISE
No Signal
HF SP-OUT
LF SP-OUT
<
–50mV
DC VOLTAGE
(Note): 0dBu = 0.775V
(Muting 動作)
(保護回路動作)
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