TB 9-4931-540-24
b. Adjustments. Refer to paragraph 6 d.
Flatness
a. Performance Check
(1) Connect synthesizer/level generator rear panel 10 MHz OUTPUT to function
generator rear panel 10 MHz In.
input.
from TI 50-75
(2) Disconnect synthesizer/level generator OUTPUT 50
(3) Connect function generator Output to TI 50-75
input.
(4) Press keys and enter values using ENTRY keys as listed in (a) through (k) below:
ENTRY INSTR PRESET.
(a)
INPUT AUTORANGE to off.
(b)
INPUT ENTRY RANGE to -25 dBm using ENTRY STEP or .
(c)
ENTRY REFERENCE LEVEL to -22 dBm.
(d)
ENTRY START FREQ to 0 Hz.
(e)
ENTRY STOP FREQ to 40.1 MHz.
(f)
ENTRY dB/DIV to 1 dB.
(g)
RBW-VBW-ST ENTRY RES BW to 3 Hz and wait for TI to calibrate ( 10 sec).
(h)
INPUT REF LVL TRACK to off.
(i)
ENTRY blue shift and then ENTRY CAL OFF.
(j)
ENTRY SAVE and then 1.
(k)
(5) Set function generator for a sinewave, 20 Hz, -25 dBm output.
(6) Press SWEEP ENTRY MANUAL key and enter 20 Hz using ENTRY keys.
(7) Record TI marker amplitude indication in table 6.
(8) Repeat technique of (5) through (7) above using remaining settings listed in table 6.
Table 6. 50
Flatness
Function generator
Test instrument
frequency and TI
marker amplitude
SWEEP ENTRY
indications
MANUAL settings
(dBm)
20 Hz
2 kHz
20 kHz
50 kHz
100 kHz
(9) Disconnect function generator Output from TI 50-75
input.
to TI 50-75
(10) Connect synthesizer/level generator OUTPUT 50
input.
(11) Press keys and enter values using ENTRY keys as listed in (a) through (d) below:
(a) ENTRY RECALL and then 1.