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7. AUXILARY CONNECTOR
This AUXiliary socket supports present and future optional accessories for the PSA-65C.
8. RF INPUT
This BNC connector accepts RF signals to signals to be observed from less than 1 MHz to
greater than 1250 MHz.
9. SPAN
The SPAN control sets the scale of the horizontal sweep presentation from 1250 MHz (125
MHz/div) to 2 MHz (.2 MHz/div). This control also automatically selects the optimum IF
resolution filter.
10.VAR SPAN
The VARiable SPAN control reduces the width of the spectrum being displayed for closer
signal examination and enhances amplitude accuracy.
11.ZERO SPAN
ZERO SPAN instantly places the analyzer into the zero span mode and activates the FM audio
demodulator for convenient signal monitoring.
AUDIO - (Upward position and switch remains in this position until manually pushed again).
This position switches on the FM demodulator circuit until the ZERO SPAN switch is returned
to the NORMal position.
NORM - This is the normal position of the ZERO SPAN switch when not monitoring audio
signals.
MOMEN - This is a momentary switch position that instantly places the analyzer into the zero
span mode and activates the FM audio demodulator for convenient signal monitoring.
12.TUNING
This multi-turn control adjusts the center frequency of the analyzer so that signals of interest
appear at the center of the display. The center frequency is also displayed by the LCD display.
13.FINE TUNE
FINE TUNE allows for fine adjustment of the center frequency. Greater adjustment range is on
the left side of the control (-) and finer adjustment range is on the right side of the control (+).
14.MULTI-FUNCTION BACKLIT LCD DISPLAY
The new microprocessor allows the multifunction LCD to show center frequency of the CRT,
span setting in MHz/Div, and the start and stop frequencies of the sweep. The CENTER
FREQUENCY is displayed by either 4 or 5 digits that permits frequency measurements
accurate to 100 KHz. NOTE: For accurate frequency measurements, the PSA-65C must be
in ZERO SPAN. The start and stop frequencies of the sweep are displayed when the on-screen
bandwidth is less than 270 MHz or 27 MHz/Div.
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