Checks and Adjustments
5-14 1705A Spectrum Monitor
h. Change the leveledsine wave generator Frequency to 5 MHz, Amplitude
Multiplier to X1, and the Amplitudeto 3. 0 (14dB m).
i. CHECK --for 1 marker every 5 Divisions, ±1 Division (adjust
CENTER FREQUENCY,if necessary).
j. Repeat partsf. through i. with C ENTER FREQUENCY at 950 MHz and
1700 MHz.
k. Remove the leveled sine wavegenerator and comb generator from the
1705A L--BANDINPUT.
l. Connect the UHF signal generatoroutput to the 1705A L--BAND
INPUT. S eeF igure5 --6.
VARIABLE
AUTOTRANSFORMER L--BAND
INPUT
UHFSINE
WAVE
GENERATOR
1705A
Figure5 -6: Using the UHF SignalGenerator to check L-Band Span/Division,
Readout,Gain, and Flatness
m. Set the UHF signal generatorAmplitude to --50 dBm and Frequency to
1000 MHz.
n. Set the 1705A SPAN/DIVto F ULL. Dial the CENTER FREQUENCY
until readout reads1000 MHz.
o. CHECK--that the m arker is intensified.
p. Set SPAN/DIVto 10 MHz.
q. CHECK -- that the marker is on screen.
r. Position the marker under the caretwith the CENTER FREQUENCY
control.