HP Knob, Earphone, Media Door, Numeric Keypad, Data Control Keys

	Front and Rear Panel Features
	Front Panel Overview
	parameters needed for making measurements.
6	MEASURE accesses a menu of keys that automate some common analyzer
	measurements. Once a measurement is running, Meas Setup accesses additional
	menu keys for defining your measurement. Meas Control and Restart access
	additional measurement control functions.
7	SYSTEM functions affect the state of the entire analyzer.
	Various setup and alignment routines are accessed with the System key.
	The green Preset key resets the analyzer to a known state.
	The File key menu saves/loads setups, traces, states, limit-line tables,
	screens, measurement results, and amplitude correction factors to or from
	analyzer memory or the floppy disk drive. The Save key immediately
	executes the Save Now function defined under File in your User’s guide.
	The Print Setup menu keys configure hardcopy outputs. The Print key
	immediately sends hardcopy data to the printer. See your User’s guide for
	more details.
8	MARKER functions control the markers, read out frequencies and amplitudes
	along the analyzer trace, automatically locate the signals of highest amplitude,
	and access functions like Marker Noise and Band Power.
9	The Media Door on the right side of the front panel accesses the 3.5 inch disk
	drive and the Earphone connector. The earphone connector provides a
	connection for an earphone jack which bypasses the internal speaker.
10	The Data Control Keys, which include the step keys, knob, and numeric
	keypad, change the numeric value of an active function such as center
	frequency, start frequency, resolution bandwidth, and marker position.

The data controls will change the active function in a manner prescribed by that function. For example, you can change center frequency in fine steps with the knob, in discrete steps with the step keys, or to an exact (1 Hz resolution) value with the numeric keypad.

The Knob provides fine incremental changes of functions such as center frequency, reference level, and marker position. Clockwise rotation of the knob increases values. The extent of alteration is determined by the size of the measurement range. The speed at which the knob is turned affects the rate at which the values are changed.

For slow sweeps, the analyzer uses a smooth panning feature which is designed to move the trace display to the latest function value as the knob is turned. When center, stop or, start frequency or reference level is adjusted, the signal will shift right or left or up or down with the rotation of the knob before a new sweep is actually taken. An asterisk is placed in the message block (the upper right-hand corner of the analyzer display) to indicate that the data on the screen does not reflect data at the current setting.

The Numeric Keypad allows entry of exact values for many of the analyzer functions. You may include a decimal point in the number portion. If not, the decimal point is placed at the end of the number.

Numeric entries must be terminated with a units key. When a numeric entry is begun, the menu keys show the units key labels. The units keys change depending on what the active function is. For example, the units keys for

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