Checks and Adjustments
1705A Spectrum Monitor 5-13
ALIGN2nd
MARKER HERE
DISREGARD
#1
GRATICULE
LINE
#2
GRATICULE
LINE
Figure5 -5:Aligning L -Band time markers with the graticule lines. Thegr aticule
beginswith 0 while the time markers are count ed 1,2, 3, etc. The first and last
divisionsof sweep should be disregarded
11. Check L--Band SPAN/DIVand Readout
REQUIREMENTS:
FULL 1 marker/Division ±1minor Division
10 MHz 1 marker/5Divisions ±1 Division
1MHz1 marker/5Divisions ±1 Division
Readout Accuracy ±20 MHz.
a. Set CENTER FREQUENCY to 1400 MHz, and set SPAN/DIVto 10
MHz.
b. Set the leveledsine wave generator Frequency to 50 MHz.
c. Position the readout caretto center of screen horizontally.
d. CHECK -- for1 marker every 5 Divisions, ±1 Division (adjust
CENTER FREQUENCY,if necessary).
e. Repeat partsa. through d. with C ENTER FREQUENCY at 950 MHz
and 1700 MHz.
f. Set CENTER FREQUENCY to 1400 MHz.
g. Set SPAN/DIVto 1 MHz.