TB 9-4931-535-35
13. 1 MΩ Flatness
a. Performance Test
(1) Press keys and enter values using ENTRY keys as listed in (a) through (g)
below:
(a) ENTRY INSTR PRESET.
(b) ENTRY STOP FREQ to 10 MHz.
(c) ENTRY dB/DIV to 1 dB.
INPUT ENTRY RANGE to .0 dBm using ENTRY STEP ⇑ or ⇓.
(d)
(e)
RBW-VBW-ST ENTRY RES BW to 3 kHz.
(f)
RBW-VBW-ST RES BW HOLD to on.
(g)
ENTRY RECALL and then 4.
(2) Connect TI TRACKING GENERATOR output to 50-75Ω input.
(3) Adjust TRACKING GENERATOR AMPLITUDE control to position trace in
the middle of crt display.
(4) Allow one complete sweep to occur. Press TRACE STORE A → B key.
(5) Disconnect TRACKING GENERATOR output from 50-75Ω input.
(6) Connect TRACKING GENERATOR output to 1 MΩ input using a 50Ω
feedthrough termination.
(7) Press keys as listed in (a) through (c) below:
(a) INPUT IMPEDANCE 1 MΩ.
(b) TRACE VIEW B to off.
(c) TRACE A - B to on.
NOTE
Ignore the LO feedthrough point at 0 Hz in (8) and (10) below.
(8) Adjust MARKER/CONTINUOUS ENTRY knob to move marker to the most
negative point on trace using TI marker amplitude indication.
(9) Press MARKER/CONTINUOUS ENTRY OFFSET key to on and then
MARKER/CONTINUOUS ENTRY ENTER OFFSET key.
(10) Adjust MARKER/CONTINUOUS ENTRY knob to move marker to the most
positive point on trace using TI marker amplitude indication. TI marker amplitude
indication will be between 0.7 and 0.7 dB.
(11) Disconnect TRACKING GENERATOR output from 1 MΩ input and 50Ω
feedthrough termination.
(12) Press keys and enter values using ENTRY keys as listed in (a) through (e)
below:
(a) MARKER/CONTINUOUS ENTRY OFFSET key to off.
