User guide

11
Section IV
Fast Sweep Adjustments
4-1 Allow 30 minutes warm up of spectrum analyzer before adjustments.
4-2 Enter CENTER FREQUENCY 1 GHz, FREQUENCY SPAN 0 Hz, scale
LINEAR, trigger VIDEO, SWEEP TIME 20 msec.
4-3 Apply a 1GHz signal, 0dBm, and pulsed with a 500Hz square wave to the
spectrum analyzer RF input.
4-4 Enter REFERENCE LEVEL and adjust front panel RPG for full-scale deflection
on LCD.
4-5 Enter SWEEP TIME 10 msec.
4-6 Enter CF STEP SIZE, [.], [1], [2], [6], [GHz]. The trace color should change to
red, indicating you are in adjustment mode.
4-7 Slowly adjust the horizontal gain, using the front panel RPG, for exactly one
vertical line per graticule.
4-8 Press the AUTO key above the CF STEP SIZE key to save setting.
4-9 Enter CF STEP SIZE, [.], [1], [2], [7], [GHz].
4-10 Slowly adjust the horizontal offset, by rotating the front panel RPG counter-
clockwise, until the maximum FS ADJ value is reached that will superimpose the
vertical signal lines with the vertical graticule lines. NOTE: a vertical line should
not be visible on the far left graticule when finished. If there is not enough
adjustment range then adjust A3A1R34 to provide the needed range of
adjustment.
4-11 Press the AUTO key above the CF STEP SIZE key to save setting.
4-12 Steps 4-6 thru 4-11 are interactive. Repeat as needed.
4-13 Enter CF STEP SIZE, [.], [1], [2], [8], [GHz].
4-14 Slowly adjust the vertical offset, using the front panel RPG, until the trace is
exactly centered.
4-15 Press the AUTO key above the CF STEP SIZE key to save setting.
4-16 Enter CF STEP SIZE, [.], [1], [2], [9], [GHz].
4-17 Slowly adjust the vertical gain, using the front panel RPG, until the trace is
exactly full scale.
4-18 Press the AUTO key above the CF STEP SIZE key to save setting.
4-19 Steps 4-13 thru 4-18 are interactive. Repeat as needed.