HP Cable Box 8591C manual Pal-M

Spectrum Analyzer Mode Key Descriptions

Spectrum Analyzer Mode Functions

PAL-M

PARAM AUTO MAN

PEAK EXCURSN

allows you to trigger on the PAL-M video format. PAL-M alters the TV line number the analyzer triggers on internally; the line number displayed by TV LINE #

does not change. PAL-M changes the video modulation to

negative; use TV SYNC NEG POS (POS) if positive video modulation is required.

Front-Panel Key Access m

lets the user choose between automatically or manually setting the parameters used for the measurement functions under the Power Menu softkey. Parameters such as span, resolution bandwidth, video bandwidth, center frequency step size, detector mode, and sweep time are coupled so that they are automatically updated. With AUTO underlined when channel bandwidth or channel spacing are changed, the coupled parameters will be updated and another sweep will be taken and measured. If MAN is underlined the user must set all of the parameters correctly.

Front-Panel Key Access (j-j

sets the minimum amplitude variation of signals that the marker can identify as a peak. If a value of 10 dB is selected, the marker moves only to peaks that rise and fall more than 10 dB above the threshold line (or the noise floor of the display). Pressing C-1 or turning on power resets the excursion to 6 dB, and the threshold to 70 dB below the reference level.

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