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Adjustment Procedures
5-52
2715 Spectrum Analyzer Service Manual
The following procedure measures the instrument’s response over the input
frequency range (15 MHz to 1000 MHz) to a known amplitude input. Once this
data is available, it is transferred to the instrument operating system. The
operating system uses the data to correct certain CATV measurements.
The following steps describe the Amplitude Flatness Adjustment process.
H Set up computer
H Measure flatness response
H Transfer data to instrument operating system
H Check flatness corrections
Preliminary Adjustment Procedure and Environment Requirements. Before
performing this step, reinstall the cabinet (removed at the start of this procedure)
and allow the instrument to warm up for at least one hour. After a stable
temperature is reached, run the instrument normalization routine as described in
Perform Service Normalizations on page 5--36.
For proper flatness adjustment, the ambient temperature for the instrument
should be within ±5° C of the temperature where normalization was performed.
The ambient temperature during factory normalization is 25° C.
Amplitude Flatness
Adjustment