Tektronix 1705A instruction manual

Checks and Adjustments

g.ADJUST - R51, R58, R75, R81, and R82 for a linear display with each marker on a graticule mark, ±1 minor Division.

h.Readjust R35 to place first marker on the extreme left graticule.

NOTE. Readjustment of R35 may cause a change in linearity.

13.Adjust Readout Range

a.Turn CENTER FREQUENCY fully counterclockwise.

b.ADJUST - R4 (Readout Cal) so the frequency readout displays 900 MHz.

14.Adjust Span/Div Magnification Registration

a.Set SPAN/DIV to 1 MHz.

b.Turn the CENTER FREQUENCY control to position any marker under the readout caret.

c.Set SPAN/DIV to 10 MHz.

d.ADJUST - R27 (Horiz Posn Readout) to position the caret directly over the marker.

e.Set SPAN/DIV to 1 MHz. Marker should be under caret ±1 minor Division.

f.Adjust the HORIZONTAL POSITION control to place the caret at the center of the screen.

g.If R27 requires adjustment, check step 10 parts a. through e. (R55), and check step 12 parts a. through d. (R35).

15.Adjust Span/Div Magnifier Range

a.Set SPAN/DIV to 10 MHz.

b.Use the HORIZONTAL POSITION control to position the caret to the center screen graticule line.

c.Turn the CENTER FREQUENCY control fully clockwise (the readout should display 2000 MHz ±50 MHz).

d.Set the signal generator Frequency to 1800 MHz, and Amplitude to -30 dBm.

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