TB 9-6625-2235-24
(16) Adjust TUNING control for 1000 MHz indication on FREQUENCY MHz
display and position a 500 MHz comb signal on lst vertical graticule line (fig. 8).
(17) Press FREQUENCY CAL pushbutton and repeat (16) above.
(18) If the second comb signal (1000 MHz) is not within 0.2 division of center
vertical graticule line (fig. 8), perform b below.
(19) Center LO feedthrough signal on crt with TUNING control.
(20) Press FREQUENCY CAL pushbutton and repeat (19) above.
(21) Adjust FREQUENCY ZERO control for 00.00 indication on FREQUENCY
MHz readout.
(22) Disconnect comb generator output from TI INPUT 5OΩ.
(23) Connect synthesizer/level generator 50Ω output to TI INPUT 50Ω.
(24) Adjust synthesizer/level generator frequency to 2 MHz and output amplitude
level to -10 dBm.
(25) Set FREQ SPAN/DIV switch to 100 kHz.
(26) Adjust TUNING control for 2 MHz indication on FREQUENCY MHz readout.
NOTE
Adjust INPUT ATTEN (OPTIMUM INPUT) switch for
workable signal level.
(27) Press FREQUENCY CAL pushbutton.
(28) Center signal on crt with synthesizer/level generator frequency controls. If
synthesizer/level generator indication is not between .980 and 3.02 MHz, perform b below.
(29) Repeat technique of (24) through (28) above for FREQUENCY MHz readout,
FREQ SPAN/DIV switch settings, synthesizer/level generator, and signal generator
frequencies listed in table 5.
Table 5. Frequency Accuracy
Test instrument
FREQUENCY
FREQ SPAN/DIV
Synthesizer/level generator
MHz
switch
or signal generator frequency
readout
(MHz)
(MHz)
settings
Min
Max
10
200
kHz
8.96
11.04
50
200
kHz
48.96
51.04
16
