Checks and Adjustments

DISREGARD

ALIGN 2nd

MARKER HERE

#1

#2

GRATICULE

GRATICULE

LINE

LINE

Figure 5-5: Aligning L- Band time markers with the graticule lines. The graticule begins with 0 while the time markers are counted 1, 2, 3, etc. The first and last divisions of sweep should be disregarded

11.Check L-Band SPAN/DIV and Readout

REQUIREMENTS:

FULL — 1 marker/Division ±1 minor Division 10 MHz — 1 marker/5 Divisions ±1 Division 1 MHz — 1 marker/5 Divisions ±1 Division Readout Accuracy — ±20 MHz.

a.Set CENTER FREQUENCY to 1400 MHz, and set SPAN/DIV to 10 MHz.

b.Set the leveled sine wave generator Frequency to 50 MHz.

c.Position the readout caret to center of screen horizontally.

d.CHECK - for 1 marker every 5 Divisions, ±1 Division (adjust CENTER FREQUENCY, if necessary).

e.Repeat parts a. through d. with CENTER FREQUENCY at 950 MHz and 1700 MHz.

f.Set CENTER FREQUENCY to 1400 MHz.

g.Set SPAN/DIV to 1 MHz.

1705A Spectrum Monitor

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Tektronix 1705A instruction manual Disregard, Marker Here Graticule Line