Graham-Patten SoundPals, User Manual

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8 • DAC-20 SoundPals User's Guide
The figure below illustrates the DAC-20’s front panel:
DAC-20 DAC-20
+6V
EMPH
3
7
8
1 2
VOLUME L R
4
ERR
6 5
GAIN
1) Stereo Headphone Connector — accepts standard low-
impedance stereo headphones.
2) Headphone Gain Control — adjusts stereo headphone volume.
The control does not affect analog output levels.
3) Left Analog Output Gain Trim — the
L GAIN
trim sets the
analog line level for the left channel output.
4) Right Analog Output Gain Trim — the R GAIN trim sets the
analog line level for the right channel output.
5) Emphasis Detection LED — the
EMPH
LED lights when the
channel status bits of the AES input signal indicates that pre-
emphasis has been applied to the signal. If the sampling
frequency is within 4% of 48 kHz, 44.1 kHz or 32 kHz, de-
emphasis correction is automatically applied.
6) AES Input Error LED — the ERR LED lights when no signal
is applied to the AES input, or when the signal is not valid . A
non-valid signal exhibits errors such as format violations, bit
errors, low level, or incorrect frequency.
7) Power Connector — accepts the power jack from the 6 VDC
power supply. Refer to Appendix B for more information
regarding external power.
8) Power LED — the large green LED below the power jack lights
when power is applied.