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The EQUB parameter sets the length of the equal-
ization interval before the vertical sync pulse. The
value is entered in multiples of scan lines with two
pulses per scan line (less one if a CCIR sync type
has been specified).
The EQUA parameter sets the length of the equal-
ization interval that follows the vertical sync pulse.
The value is entered in multiples of scan lines with
two pulses per scan line (less one if a CCIR sync
type has been specified).
❖ Equalization pulses will only be added to the
Digital composite sync signal when DSCT is set
to 4 or 8.
Equalization pulses will only be added to the
Analog composite sync signal when ASCT is set
to 4 or 8.
That is all of the timing parameters you need to
enter. You may wish to go through a couple of cal-
culations in the next section just to see if the format
you are setting up matches your spec sheet.
Calculated Rates
Many video specification sheets include a pixel rate
parameter and a frame rate parameter. You do not
need to program them into the 801G*. The firmware
calculates the two values based on other entered
parameters. You can double check your entries by
calculating the pixel and frame rates.
The pixel or dot clock rate is equal to HRAT multi-
plied by HTOT. The hardware limits of the genera-
tor do not allow rates above 135.000 MHz
❖ If your calculated pixel rate exceeds the maxi-
mum limit, you will need to proportionately
reduce HTOT, HRES, HSPD and HSPW to give
you a valid format. This will produce a correctly
sized and centered test image. However, the
display will not be driven at its full video band-
width.