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Operating Instructions
1705A Spectrum Monitor
2-3
6. SPAN/DIV
Two push-button switches (left and right) that select the calibrated span per
division. Each span is indicated by a front-panel LED.
FULL -- Provides a span of 50 MHz per division for the L--Band (900 -- 2000
MHz) input, and 5 MHz per division (45 to 100 MHz) for the 70 MHz input.
10 MHz -- Sets display span to 10 MHz per division. Displays a maximum
of 120 MHz for one full sweep (not available for the 70 MHz input). The
100 MHz portion of the sweep that is displayed is dependent on the setting
of the HORIZONTAL P OSITION control.
1 MHz -- Sets display span to 1 MHz per division. Displays a maximum of
12 MHz for one full sweep. The 10 MHz portion of the sweep that is
displayed is dependent on the setting of the HORIZONTAL POSITION
control.
100 kHz -- Sets display span to 100 kHz per division. Displays a maximum
of 1.2 MHz for one full sweep. The 1 MHz portion of the sweep that is
displayed is dependent on the setting of the HORIZONTAL POSITION
control.
MENU -- When both SPAN/DIV switches are pressed simultaneously, the
normal display is replaced by the Main menu. To exit the Main menu,
position the cursor by EXIT and press the INPUT switch. The Menu
functions are discussed in detail later in this section.
7. FOCUS
A variable control that adjusts the crt beam for optimum definition.
8. SCALE
A variable control that adjusts the level of graticule illumination.
9. INTENS
A variable control that adjusts the display brightness.
10. TRACE ROTATION
A screwdriver adjustment that aligns the crt trace with the crt graticule to
compensate for variations in the magnetic field surrounding the 1705A.
DISPLAY