Use With Dc Connect - Listen SC Amp Manual Del Usuario

Use with DC Connect

Voice Coil Offset (DC Offset)
SC Amp can be used with external voltage sources in order to apply an offset to the stimulus sent to a
speaker under test.
The example in Figure 7-6
Offset voltage to SC Amp.
The SoundCheck system is connected via USB to DC Connect
DC Connect output is connected to the DC Offset input of SC Amp
The SoundCheck sound card Output 1 is connected to the Line In of SC Amp
A DC Connect Stimulus Step in a test sequence controls DC Connect to send a 1 VDC signal to SC
Amp
The sine sweep stimulus from the SoundCheck sequence has a positive offset of 1 V applied to it
as show in Figure 7-6.
DC Connect Stimulus Step in SoundCheck sequence set to control
DC Connect via USB. DC Connect output voltage set to 1 VDC.
Computer Running SoundCheck
1 V
0 V
Positive Offset
Stimulus to speaker is positive, offset by 1 V
Use with other offset sources is similar. Any voltage supply can be used to
Note:
apply up to ±3.5 VDC or Low frequency AC (<5 Hz).
16
shows SoundCheck controlling Listen's DC Connect in order to supply a DC
Figure 7-6: DC Offset Example
Operation
®
Audio
Output 1
DC Voltage
Output
TM
SC Amp Manual