Quantum Data 801GC, 801GF, 801GX Owner's And Programmer's Manual page 320

2321 Vertical active must be even when in inter-
laced scan mode
The generator does not support vertical active periods (in
lines) that cannot be evenly divided by two (2) when
interlaced operation is selected.
Make the vertical active period (in lines) evenly divisible
by 2.
Change to progressive (non-interlaced) scan mode.
2330 Vertical blanking too small
There must be at least 3 lines of vertical blanking with
interlaced operation.
Increase the vertical period.
Decrease vertical active.
Switch to non-interlaced operation.
2350 Vertical pulse too small
The generator does not support a vertical sync pulse width
value of less than one scan line in duration. The firmware
makes the pulse a half-line shorter than the entered value
when European type sync is selected.
Increase the vertical sync pulse width.
2370 Vertical pulse too large
The generator does not support a vertical sync pulse width
greater than the number of blanked scan lines per frame
with non-interlaced operation.
Decrease the value of vertical sync pulse width.
Increase the value of vertical period (in lines).
Decrease vertical active.
2390 Vertical pulse too large
The generator does not support a vertical sync pulse width
greater than the least number of blanked scan lines ((Vper
- Vact - 1)
Decrease the value of vertical sync pulse width.
Increase the value of vertical period (in lines).
Decrease vertical active.
8-12
Chapter 8: Error Messages
2 ) between fields with interlaced operation.
Model 801GC, 801GF & 801GX¥Rev. A