HP Cable Box 8591C manual TV Trig

Spectrum Analyzer Mode Key Descriptions

Spectrum Analyzer Mode Functions

selects the line number of the video picture field. The values allowed are 1 to 1012. [PRESET) sets the TV line number to 17.

Front-Panel Key Access (TRIG)

allows the analyzer to trigger on the standard video formats; NTSC, PAL, PAL-M, or SECAM-L.

Front-Panel Key Access ITRIG)

selects the polarity of the modulation of the video format. NTSC uses the negative or positive modulation video format. NTSC, PAL, and PAL-M use negative modulation. SECAM-L uses positive modulation.

Front-Panel Key Access m

TV TRIG

provides sweep triggering on the selected line of a video picture field and accesses the softkey menu used to select the line number of the video picture field and the type of video picture frame.

When TV TRIG is pressed, the trigger mode is changed to TV trigger, TV LINE # becomes the active function, and the softkey menu for changing the TV line numbers and video field trigger is accessed.

If the analyzer is in non-zero span, the resolution bandwidth is changed to 1 MHz, the frequency span is set to 0 Hz,

the detector mode is changed to sample, the sweep time is changed to 100 ,US, the amplitude scale is changed to linear, a sweep is taken, and a marker is placed on the signal peak.

Front-Panel Key Access (TRIG)

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