Planar LC12 Manuale Utente

Title:  Product Specification: LC12 High-Bright Monitor 

Page 12 of 24 

Document Number: 023-0284-01 

 

          Revision:  A 

physically connected to Signal Ground Reference (Pin 10) as defined by the 

wiring definitions of Table 2. 

4.3       Signal Quality 

4.3.1       

TTL Sync Pulse Signal Levels 

Input levels for the horizontal and vertical sync pulses are defined in Figure 8. 

4.3.2       

Rise and Fall Times 

Rise and fall times are the times required for signal transitions between 10% of Vs 

above Low Steady Level and 10% of Vs below High Steady Level where Vs is the 
peak-to-peak video input signal level.  The overshoot, if present, shall be exempted 

from establishing these high/low levels referenced in. Both rise and fall times of each 

input signal shall be as follows: 

Video:  

 

 

Less than 5-ns 

Horizontal Sync: 

 

Less than 50-ns 

Vertical Sync:   

 

Less than 100-ns 

4.4       Timing and Frequency 

4.4.1       

Video, Horizontal And Vertical Sync 

Figure 6 illustrate video timing relationships the Monitor operates within when the 
specified video mode (per Table 3) is applied. 

Front Porch defines the time from end of active video data to the start of Horiz/Vert 
Sync Pulse. 

Back Porch defines the time from end of Horiz/Vert Sync Pulse to the start of active 

video data. 

Blanking is the total time comprising Front Porch, Back Porch and Sync Pulse time(s). 

The horizontal sync circuitry synchronizes to horizontal frequencies of 31.468 KHz 

±0.5 KHz, 48.077KHz ±0.5KHz,  and 56.476KHz ±0.5KHz.  Horizontal sync pulse width 
variation is 1.813-µsec to 3.813-µsec. The Monitor will "sync" to the specified format 

vertical frequencies between 60Hz?72Hz without adjustment. 

Absence of Horizontal and/or Vertical Sync will not damage the Monitor nor violate 

EMI radiation limits specified herein.