TB 9-6625-2328-24
(g) CHANNEL 2 50Ω/1MΩ to 50Ω (LED on).
(h) CHANNEL 2 DC/AC to DC (LED on).
(5) Set function generator for a square wave, 1 MHz, 80 mV p-p, -60 mV dc offset,
into a 50 Ω feed through.
(6) Press TI RUN key.
(7) Increase function generator dc offset in 1 mV increments until TI Gate indicator
flashes and frequency indication is stable at approximately 1 MHz. Add 40 mV to function
generator dc offset indication and record results. Example: -29 mV + 40 mV = 11 mV.
(8) Set function generator dc offset to +60 mV.
(9) Press TI CHANNEL 1 Trigger/Sensitivity key until SLOPE: is displayed
then press key to display SLOPE: NEG.
(10)Press TI RUN key.
(11)Decrease function generator dc offset in 1 mV increments until TI Gate
indicator flashes and frequency indication is stable at approximately 1 MHz. Subtract 40
mV from function generator dc offset indication and record results. Example: 28 mV
40 mV = -12 mV.
(12)Calculate trigger level by adding results recorded in (7) and (11) above.
Example: 11 mV + -12 mV = -1 mV. Calculated trigger level will be between -15 and
+15 mV.
(13) Connect function generator Output to TI CHANNEL 2 input.
(14) Press TI MEASURE Freq & Ratio key until FREQUENCY 2 is displayed.
(15)Set function generator for a square wave, 1 MHz, 80 mV p-p, -60 mV dc offset,
into a 50 Ω feed through.
(16)Press TI RUN key.
(17)Increase function generator dc offset in 1 mV increments until TI Gate indicator
flashes and frequency indication is stable at approximately 1 MHz. Add 40 mV to function
generator dc offset indication and record results. Example: -28 mV + 40 mV = 12 mV.
(18)Set function generator dc offset to +60 mV.
(19)Press TI CHANNEL 2 Trigger/Sensitivity key until SLOPE: is displayed
then press key to display SLOPE: NEG.
(20)Press TI RUN key.
(21)Decrease function generator dc offset in 1 mV increments until TI Gate
indicator flashes and frequency indication is stable at approximately 1 MHz. Subtract 40
mV from function generator dc offset indication and record results. Example: 33 mV -
40 mV = -7 mV.
(22)Calculate trigger level by adding results recorded in (17) and (21) above.
Example: 12 mV + -7 mV = 5 mV. Calculated trigger level will be between -15 and +15 mV.
(23)Disconnect function generator from TI.
b. Adjustments. No adjustments can be made.
6