HSPP

Horizontal Sync Pulse Polarity

Classification:

Format parameter setting

Command Syntax:

HSPP <polarity>

Limits:

<polarity>

 

0 = active-low (negative going pulse)

 

1 = active-high (positive going pulse)

Query Syntax:

HSPP?

Query Response:

<polarity>

Description:

The HSPP command establishes the logic sense of the digital

 

horizontal sync outputs. Setting polarity to one (1) causes the

 

leading edge of horizontal sync to be a low-to-high transition.

 

Setting polarity to zero (0) causes the leading edge of horizontal

 

sync to be a high-to-low transition. The HSPP? query returns

 

the current polarity of HSPP.

Other Required Cmds:

In order to use digital horizontal sync, it must be gated on with

 

the HSPG command and digital separate H&V sync must be

 

selected with the SSST command. The FMTU command instructs

 

the generator to use the new setting. The ALLU command updates

 

hardware to the new setting and redraws the test image.

Example:

H S P P 0 / / S e t a c t i v e l o H s y n c i n

 

/ / b u f f e r

 

H S P G 1 / / E n a b l e H s y n c o u t p u t i n

 

/ / b u f f e r

 

S S S T 1 / / S e l e c t H & V s y n c t y p e i n

 

/ / b u f f e r

 

F M T U / / U p d a t e h a r d w a r e t o c u r r e n t

 

/ / b u f f e r c o n t e n t s

HSPW

Horizontal Sync Pulse Width

Classification:

Format parameter setting

Command Syntax:

HSPW <pixels>

Limits:

<pixels>

 

min = 1

 

max = HTOT - HRES - HSPD

Query Syntax:

HSPW?

Query Response:

<pixels>

Description:

The HSPW command establishes the width of the horizontal

 

sync pulse. The HSPW? query returns the current setting of

 

HSPW.

Other Required Cmds: The FMTU command instructs the generator to use the new setting. The ALLU command updates hardware to the new setting and redraws the test image.

Example: H S P W

3 2 / /

S e t p u l s e w i d t h t o 3 2 p i x e l s

 

/ / i n

b u f f e r

F M T U

/ /

U p d a t e h a r d w a r e t o c u r r e n t

 

/ /

b u f f e r c o n t e n t s

6-138

Chapter 6: Programming

Model 801GC, 801GF & 801GX¥Rev. A

Page 264
Image 264
Quantum Data 801GC, 801GF, 801GX manual Hspp, Horizontal Sync Pulse Polarity, Hspw, Horizontal Sync Pulse Width, 138