HP Cable Box 8591C manual 112

Spectrum Analyzer Mode Key Descriptions

Spectrum Analyzer Mode Functions

provides a convenient starting point for making most measurements. Pressing CPRESET] displays softkeys used for accessing the operating modes available for your analyzer. See lable 6-l 1 and Table 6-10 for the conditions established by pressing c-1.

The instrument preset function performs a processor test, but does not affect CAL data. Pressing I=] clears both the input and output buffers, but does not clear trace B. The amplitude values of trace C are set to the reference level. Amplitude-correction factors are turned off. Limit-line testing is turned off, but the limit-line tables remain in analyzer memory. The status byte is set to 0. Instrument preset affects all operating modes. (See the key description for CMODE] for more information about other operating modes.) Pressing [PRESET) erases all “on time” functions-ONCYCLE, ONDELAY, ONEOS, ONMKR, ONSRQ, ONSWP, ONTIME, and TRMATH. These are remote programming commands. See the HP 8590 E-Series and

L-Series Spectrum Analyzers and HP 8591C Cable TV

Analyzer Programmer’s Guide for more information.

N O T E

Turning the analyzer on performs an instrument preset. Turning on the analyzer also fetches CAL data; completes a processor test; clears trace ET, trace C, and both the input and output buffers; turns off amplitude correction factors; turns off limit-line testing; and sets the status byte to 0. The last state of the analyzer (before it was switched off1 is recalled, unless IP has been set by the POWER ON function.

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