MSD-501/502 Command Guide
40
3.3.7 Input timing
@AIS / @AIT
Automatic measurement
Function
Automatic measurement of start position
and display period.
Automatic measurement considering aspect
ratio
Format
@AIS, ch
@AIT, ch
Return value
@AIS, ch
@AIT, ch (, mode)
Parameter
ch: Input channel
4 = IN4, 5 = IN5
mode: Measurement mode
-1 = NEXT ASPECT, 0 = 4:3, 1 = 5:4, 2 = 5:3, 3 = 16:9, 4 = 16:10
If you select “NEXT ASPECT”, the next aspect ratio will be selected in order every time
the automatic measurement is executed. If you do not set any mode parameter, “NEXT
ASPECT” mode will be applied.
Example
@AIS,4
@AIS,4
Measuring start position and display period of IN4
automatically.
Completed normally.
@AIT,4,0
@AIT,4,0
Measuring IN4 input timing setting at the aspect
ratio of “4:3” automatically.
Completed normally.
@AIS,4
@ERR,7
If automatic measurement fails, an error is replied.
Remarks
Those commands are valid only when analog RGB/analog YPbPr signals are input.
@GHT / @SHT
The total number of horizontal dots
Function
Getting
Setting
Format
@GHT
@SHT, ch, h_total
Return value
@GHT, h_total_1, h_total_2, h_total_3,
h_total_4, h_total_5
@SHT, ch, h_total
Parameter
h_total_1-5 / h_total: The number of horizontal dots
400 to 4125 (sampling block should be 13 MHz to 162 MHz)
[Default]: depends on input signals
ch: Input channel
0 = All analog inputs, 4 = IN4, 5 = IN5
Example
@GHT
@GHT,2200,2200,0,2640,1344
Getting the total number of horizontal dots.
“0” will be replied to channels without input
signals.
@SHT,5,1344
@SHT,5,1344
Setting the total number of IN5 horizontal
dots to “1344”.
Completed normally.
@SHT,5,1344
@ERR,3
If analog RGB signals or analog YPbPr
signals are not input, an error will be replied.
Remarks
Getting command will acquire statuses of all channels.
Setting commands are valid only when analog RGB/analog YPbPr signals are input.
