Video Signal Generator Owner's And Programmer's Manual

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HRAT Horizontal RATe
Classification: Format parameter setting
Command Syntax: HRAT <frequency in Hz>
Limits: <frequency in Hz> (floating point accepted)
typical min = 1000
typical max = 130000
Query Syntax: HRAT?
Query Response: <frequency in Hz> (floating point returned)
Description: The HRAT command sets the line frequency. Pixel rate is equal
to the product: HTOT times HRAT. Frame rate is equal to the
quotient: HRAT divided by VTOT. Field rate is equal to the
product: SCAN times the frame rate. The HRAT? query returns
the current horizontal frequency setting.
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.
Examples: HRAT 32768 // Set 32.768 kHz rate in
// buffer
FMTU // Update hardware to current
// buffer contents
or
HRAT 32.768E3 // Set a 32.768 kHz rate
FMTU // Update hardware to current
// buffer contents
HRES Horizontal RESolution
Classification: Format parameter setting
Command Syntax: HRES <pixels>
Limits: <pixels>
min = 16
max depends on VRES and model of generator
Query Syntax: HRES?
Query Response: <pixels>
Description: The HRES command establishes the number of active pixels per
line. The HRES? query returns the current setting of HRES.
Other Required Cmds: The ALLU command updates hardware to the new setting and
redraws the test image.
Example: HRES 480 // Set 480 active pixels line
// in buffer
ALLU // Configure hardware and redraw
// image