18. RS485 IN
The function of the RS485 IN is opposite to RS85 OUT. It allows incoming communication between a DPA900/ 1500 stereo amplifier and PC or another DPA900/1500 stereo amplifier. The RS485 port is very suitable for remote control over long distances (Difficult with RS232 standard ports) and
19.RS485 OUT
This is the standard serial communication interface. It allows outgoing communication between a DPA900/ 1500 stereo amplifier and PC or another DPA900/1500 stereo amplifier. The RS485 port is very suitable for remote control over long distances (difficult with RS232 standard ports) and for
20.RS232 Serial Communication Port
The RS232 port allows incoming and outgoing communication between the DPA900/1500 stereo amplifier and PC via connecting the DPA900/1500 stereo amplifier to a PC, all the processor functions are possible to be controlled remotely by ALTO editing software.
4.GETTING STARTED
Switching on the DPA900/1500, after an initialization procedure, the last selected preset and settings will be loaded,
the number of last preset will appear on the display:
PRESET |
|
| |
EDIT |
| VOLUME |
|
CHSEL |
| HUM CANCEL | |
COMM |
| NOISE GATE | |
8 8 | MULTICOMP | ||
|
| SIG/LIMITER | |
UP | DOWN | SELECT | ENTER |
4.1 Preset Selection
There are total 33 presets available: (factory preset: 01, user preset 01.~32.)
Select "PRESET" using SELECT key, the "PRESET" indicator lights up and the last selected preset will appear on the display.
Use UP/DOWN keys to select a desired preset. 
Press ENTER key to load the preset.
4.2EDIT Menu
This menu includes 4 items: VOLUME, HUM CANCEL, NOISE GATE, MULTICOMP.
- Volume Adjustment (-99~0dB)
Select "EDIT" menu using SELECT key, both the "EDIT" and "VOLUME" indicators will light up, and the last selected volume level will be displayed.
Press ENTER key till an additional "." appeared after the present volume value. 
Use UP/DOWN keys to adjust the level of output signal.
Note: this adjustment of volume level effects only on the selected channels.
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