BenQ V37X, Product Service Manual, Page: 24 / 192

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(3) Video Signal Level
The video signal when terminated with an idea 75ohm termination will have a range of 0V to 0.7V
(normal), and its full scale output will be 0.7V and black level will be between 0V and 0.1V.
3.1.5 Signal Timing
(1) PC synchronization :
(A)Horizontal frequency range: 31 to 60KHz
(B)Vertical frequency range: 56 to 75 Hz
(C) Type : Display accepts separate Horizontal, Vertical sync, composite sync, and SOG.
(D) Level: Display accepts positive and negative sync. signal from both 3.3V and 5V TTL
families. Inputs sense a logic 0 when the input absolute value is 0.8 V or less and logic 1
when the input absolute value is 2.3V or greater.
(E) Impedance : 2.2KOhm min (pull down)
(F) Abnormal signal immunity : The monitor cannot be damaged by improper sync, timing
pulse duration, or absence of sync, or abnormal input signal amplitude (video and/or sync
too large or too small), or any other anomalous behavior of a graphics card or video
generator when changing modes, or when any combination of input signals is removed or
replaced. Additionally, under these conditions, the monitor cannot cause damage to the
source.
(2) PC Preset & User mode :
(A) Preset Modes : 10 previous timing will store in preset timings.
(B) User Mode : Any video modes for which the timing is not recognized as a preset but
included in the synchronization range will replace oldest preset timing.
(C) Mode tolerance : Monitor recognizes preset modes within a range of ± 0.5KHz for
horizontal frequencies and within ± 0.5Hz for vertical frequencies.