Checks and Adjustments
5-12 1705A Spectrum Monitor
10. Check L--Band Linearity
REQUIREMENT-- One marker perDivision ±1 minor Division.
a. Connect the output of the leveled sine wave generator,through the comb
generator,to the 1705A L--BAND INPUT. See Figure 5-4.
SG503
Comb
Generator
VARIABLE
AUTOTRANSFORMER L--BAND
INPUT
1705A
Figure5 -4: Equipment connections for L- Band checkout
b. Set the leveledsine wave generator Frequency to 100 MHz, Amplitude
Multiplier to X1, and the Amplitudeto 1. 5 (8dB m).
c. Set the 1705A INPUT to L--BAND.
d. Set the SPAN/DIVto FULL.
e. CHECK --for 10 frequency markers. (Ignore any sweep startmarker.)
f. CHECK that each mark er is within one minor Division of a m ajor
graticuleline when the 2nd marker is on the first graticule line in from
theleft. SeeFigure5-5.