TB 9-4931-540-35
(53) Press SWEEP ENTRY MANUAL key and then ENTRY STEP ⇑ key twice. TI
marker amplitude indication will be <-70 dBm.
(54) Disconnect oscillator from TI and 50Ω feedthrough termination.
18. Bandwidth
a. Performance Check
(1) Connect synthesizer/level generator OUTPUT 50Ω to TI 50-75Ω input.
(2) Set synthesizer/level generator for a 10 MHz, -25 dBm output.
(3) Press keys and enter values using ENTRY keys as listed in (a) through (f)
below:
(a)
ENTRY INSTR PRESET.
(b)
ENTRY CENTER FREQUENCY to 10 MHz.
(c)
ENTRY REFERENCE LEVEL to -24.5 dBm.
(d)
ENTRY dB/DIV to 1 dB.
(e)
RBW-VBW-ST RES BW HOLD to on.
(f)
INPUT AUTORANGE to off.
(4) Press keys and enter values using ENTRY keys as listed in (a) through (c)
below:
(a) RBW-VBW-ST ENTRY RES BW to 3 Hz.
(b) ENTRY FREQUENCY SPAN to 10 Hz.
(c) RBW-VBW-ST ENTRY SWEEP TIME to 15 sec.
(5) Allow one complete sweep to occur.
(6) Adjust MARKER/CONTINUOUS ENTRY knob to move marker to the most
positive point on trace using marker amplitude indication.
(7) Press MARKER/CONTINUOUS ENTRY OFFSET key to on and then press
MARKER/CONTINUOUS ENTRY ENTER OFFSET key.
(8) Adjust MARKER/CONTINUOUS ENTRY knob to move marker down the left
side of trace until marker amplitude indication is between 2.97 and -3.03 dB.
(9) Press MARKER/CONTINUOUS ENTRY ENTER OFFSET key.
(10) Adjust MARKER/CONTINUOUS ENTRY knob to move marker to the right
side of trace until marker amplitude indication is between 0.03 and -0.03 dB.
(11) TI marker offset frequency indication will be within limits specified in table 10.
Record TI actual marker offset frequency indication in table 10.
(12) Press MARKER/CONTINUOUS ENTRY OFFSET key to off.
(13) Repeat (4) through (12) above for remaining TI settings and indications listed in
table 10.
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