FLAT

F l a t n e s s Data

FM COIL DRIVE

FI4

GAIN

Spectrum Analyzer Mode Key Descriptions

Spectrum Analyzer Mode Functions

draws a zero-slope line between the coordinate point of the current segment and the coordinate point of the next segment, producing limit-line values equal in amplitude for all frequencies between the two points. If the amplitude values of the two segments differ, the limit line “steps” to the frequency value of the second segment.

Front-Panel Key Access (j-1

provides access to the softkeys used for viewing or editing the flatness-correction constants. This is a service calibration function and is for service use only.

Front-Panel Key Access [CAL)

displays the output of the FM coil driver produced on the A7 Analog Interface assembly. This is a service diagnostic function and is for service use only.

Front-Panel Key Access ICAL)

adjusts the FM deviation display. The center graticule represents zero deviation. The top graticule is the positive deviation set by FM GAIN. The bottom graticule is the negative deviation set by FM GAIN. The range for FM gain is from 10 kHz to 500 kHz. The default value is 100 kHz.

Front-Panel Key Access tAUXCTRL_) or (CAL)

FM OFFSET

adjusts the horizontal trace for center-screen with no modulation on the carrier. This is a service diagnostic function and is for service use only.

Front-Panel Key Access ICAL)

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