TP-Link DA-500F-HL CU - Manual (Page 8)

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11. CH 1 mode ON/OFF switch
[CH 1 TO ALL, ON / OFF]
Setting this switch to ON (pressed in) transmits
the Channel 1 input signal to all channels. Output
signal levels can be individually adjusted with
each channel's input level control (3).
Note
Be sure to first turn off the power switch when
changing the CH 1 mode switch settings.
12. Functional ground terminal [SIGNAL GND]
Hum noise may be generated when external
equipment is connected to the unit. Connecting
this terminal to the functional ground terminal of
the external equipment may reduce the hum
noise.
Note
This terminal is not for protective ground.
13. HPF ON/OFF switch (DA-500F-HL only)
Input signals to CH1 – CH4 can be filtered
through the High-pass filters having 6 dB
attenuation at a cut-off frequency of 50 Hz.
Set the DIP switch to the "ON" position to switch
on the filter, and set it to the "OFF" position to off
the filter.
Note
The DIP switch is factory-preset to the "OFF"
position.
When a bridge connection is made
Perform high-pass filter setting with the CH1
DIP switch when Channels 1 and 2 are
bridge-connected (Set the Bridge 1 ON/OFF
switch (10) to ON). (Filter setting for the
CH2 is disabled.)
Similarly, perform the filter setting with the
CH3 DIP switch when Channels 3 and 4 are
bridge-connected. (Set the Bridge 2
ON/OFF switch (10) ON). (Filter setting for
the CH4 is disabled.)