TB 9-4931-540-35
13. 1 MΩ Flatness
a. Performance Test
(1) Press keys and enter values using ENTRY keys as listed in (a) through (l)
below:
(a) ENTRY INSTR PRESET.
INPUT ENTRY RANGE to -5 dBm using ENTRY STEP ⇑ or ⇓.
(b)
(c)
ENTRY REFERENCE LEVEL to -6 dBm.
(d)
INPUT REF LVL TRACK to off.
(e)
ENTRY dB/DIV to 1 dB.
(f)
ENTRY START FREQ to 20 Hz.
(g)
ENTRY STOP FREQ to 1 kHz.
(h) RBW-VBW-ST ENTRY RES BW to 3 Hz and wait for TI to calibrate (≈10
sec).
(i)
RBW-VBW-ST ENTRY VIDEO BW to 10 kHz.
(j)
RBW-VBW-ST ENTRY SWEEP TIME to 30 sec.
(k)
ENTRY blue shift and then ENTRY CAL OFF.
(l)
ENTRY SAVE and then 1.
(2) Connect TI TRACKING GENERATOR output to 50-75Ω input.
the center of crt display.
(4) Press SWEEP SINGLE key twice and allow sweep to complete.
(5) Press keys as listed in (a) through (d) below:
(a) TRACE STORE A → B.
(b) TRACE A - B to on.
(c) TRACE VIEW B to off.
(7) Connect TRACKING GENERATOR output to 1 MΩ input using a 50Ω
feedthrough termination.
(8) Press SWEEP SINGLE key twice and allow sweep to complete.
(9) Adjust MARKER/CONTINUOUS ENTRY knob to move marker to the point
on trace with the largest deviation from .00 dB. TI marker amplitude indication will be
between -0.7 and 0.7 dB.
(10) Press INPUT ENTRY RANGE key and ENTRY STEP ⇑ key to 15 dBm.
(11) Repeat (8) and (9) above.