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DSM250 User’s Manual
Page 6 Revision 1.4.16a
3 Operating the DSM250
3.1 Turning the DSM250 On
To turn on the DSM250, press the power key (the leftmost of the five keys on the keypad). The
DSM250 will display a warning and ask you to press the Accept key ( ) to acknowledge the
warning and continue operation of the DSM250 (see Figure 5 below).
Figure 5 – DSM250 Power Up Screen
Alternatively, you may power down the DSM250 by pressing and holding the power key (see Section
3.2 below for details).
3.2 Turning the DSM250 Off
To turn the DSM250 off, press and hold the power key. The DSM250 will display a countdown
screen, which can be seen in Figure 6. If you continue to hold the power key, the DSM250 will power
down in approximately three seconds. If you release the power key before these three seconds have
elapsed, the DSM250 will return to its current operational state.