Page 10
R15AAC/AAU (vs15)
3.7
Others
3.7.1 Detection of POWER switch status
The I307 gm2621 identifies the ON status of the two power supplies. The identification is
made when the power supply is turn off. For example, if the power supply is turn off with
the POWER switch, the POWER switch must be turn on when active the power supply
again. If the power supply is turned off by pulling out the power cord, then this power
supply can be turned on by connecting the power cord, without pressing the POWER
switch.
3.7.2 Display mode identification
3.7.2.1Display mode identification
The display mode of input signal is identified based on Table 2.
When the mode has been identified through the measurement of horizontal and
vertical frequencies, the total number of lines is determined with a formula of
“
Hori-
zontal frequency / Vertical frequency = Total number of number of lines
”
. Final
identification can be made by examining the coincidence of the obtained figure with
the number of lines for the mode identified from the frequency. The Distinction
Hsync and Vsync of each mode is shown in Table 3.
When the detected frequency if the sync signal has changed, the total number of
lines should be counted even through it is range identified frequency in the same
mode.
3.7.2.2Out of range
This out of range mode is assumed when the frequency out of the horizontal /
vertical signal is as specified below.
Vertical frequency : 56 ~ 76 Hz.
Horizontal frequency : 30 ~ 63KHz.
3.7.2.3Power save mode
The power save mode is assumed when the horizontal / vertical signals are as
specified below.
If there is no horizontal sync signal input.
If there is no vertical sync signal input.
If the horizontal sync signal is outside the measuring range of I307 gm2621.
If the vertical sync signal is outside the measuring range of I307 gm2621.
●
●
●
●
●
●
●
●
●
