OWI User Manual: Model AMP1SGRN Speaker Amplifier with Priority Audio Override
OWI Model AMP1SGRN Manual Page 19 of 28
The Green Speaker Amplifier RS232 firmware
RS232 settings are 19,200 baud, 8 bits, no parity, 1 stop bit (8N1) . N
8,19200,No,1,No
INPUT RS232 COMMANDS
:
USER CHOICES MENU (Via Hyperterminal or Putty)
Press:
0
For self test
1
To set time after audio stops and before sleep, in 2 to 30 minutes.
Note: energy star maximum is 30 minutes; factory set time is 2 minutes.
2
To set delay time (2 to 60 seconds) for priority to normal delay.
3
To switch volume control from under the grill to RS232 control.
4
Future.
Note: to change audio volume press 1 (down) or 2 (up) outside of this menu.
5
To set/reset optional solid state relay.
6
To see moving display of relative power amplifier current.
7
To reboot.
8
Future.
9
To return to main (necessary to see selection results.)
T
For time until sleep in seconds.
Note: you will have 1 minute to make a choice. If the menu times out, press U or u to restart.
0 Self test Supervision
The Selftest routine reads the existing audio current, as a reference, then
sends a low frequency signal through the power amplifier and reads the resulting current. The
difference is compared to a known reference. The self test verifies that a speaker and its cable is
okay (only self test with “0”).
1 Sleeptime
This the time from when audio stops and the unit goes to sleep. Factory set is 15
minutes, Energy star maximum is 30 minutes. Sleeptime is settable from 2 to 30 minutes.
2 Priority-to-Normal
delay time. Settable from 2 to 60 seconds. It starts counting when priority audio
stops, and flashes the red LED each second. On the computer, time left is shown.
3 RS232 Volume Control Switch
chooses between the speaker grill volume control and an
electronic volume control allowing 128 volume steps.
4 Future.
To set the electronic volume control, press keys 1 and 2 when not in the menu.
5 Solid State Switch
Press the 1 key to turn on the relay and 2 key to turn the relay off. The sleep
mode overrides the control and turns the relay off.
6 Audio Current Reading
Samples power amplifier current twenty times at 1 second intervals.
7 Reboot
Restarts the Green’s on board computer.
8 Future.
9 Main Return
Sends the Green’s on board computer to the beginning of the program, “Main”.
T Time Until Sleep
returns the time until sleep in seconds.
An adapter for the DB9 to USB connection is ATEN UC-232A.
