Quantum Data 881 - Manual (Page 391)

881/882 Video Test Generator User Guide (Rev A.22) 373
CEC1:CECT:0BIT 1.5 2.25 //sets the low period of a zero bit to 1.5
milliseconds and the total bit time to
2.25 milliseconds
3. Enter the following command to modify the timing of the start bit in a message.
CEC1:CECT:SBIT 3.7 4.5 //sets the low period of a start bit to 3.7
milliseconds and the total bit time to
4.5 milliseconds
To test the bit timing through the CEC Controller:
1. Access the CEC Controller using the procedures in “ To run the CEC Controller: ” on
page 370.
The table below describes the fields of the Control Timing portion of the CEC
Controller dialog box.
2. Select the high period or low period of the start bit, logical 0 bit or logical 1 bit by
selecting the associated radio button.
Note that you can apply multiple settings for each command. For example you could
change the timing for both the high and low periods of the start, 0 bit and 1 bits
simultaneously. You have to reset each timing change.
Setting Function
Start bit low period sets the time duration of the start bit low period
Start bit total bit period sets the time duration of the start bit total period
which enables you to set the high period
1 bit low period sets the time duration of the 1 bit low period
1 bit total period sets the time duration of the start bit total period
which enables you to set the high period
0 bit low period sets the time duration of the 0 bit low period
0 bit total period sets the time duration of the 0 bit total period
which enables you to set the high period