Texas Instruments THS3115 EVM, Руководство пользователя

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Operating the EVM on Channel 2
2-7 Using the THS3115/25 EVM
2.6 Operating the EVM on Channel 2
1) Turn on the dc power supply.
2) Verify that both the +15 V (current meter 1) and the –15 V (current meter 2)
currents are below 25 mA.
Currents above the limits stated above indicate a possible short or
a wrong resistor value on the PCB. Do not proceed until this
situation is correct.
3) Turn on the function generator.
4) Verify the oscilloscope is showing two 1-MHz sine waves as shown in
Figure 2--6. Both should have amplitude of
±
0.5 V and both should be in
phase.
Figure 2--6. Oscilloscope Output for Channel 2
600 m
400 m
200 m
0
--200 m
--400 m
--600 m
0 500 n 1
m
s
Vo
lt
ag
e
--
V
t -- Time -- s
INPUT
and
OUTPUT
5) Set the shutdown supply to 0 V, but leave it off.
6) Turn on the single 5 V power supply and verify that the output is
unchanged from step 4. Turn off the supply.
7) Disconnect the shutdown supply from the EVM.
8) Set the shutdown supply to 5V, but turn it off during the next step.
9) Reconnect the shutdown supply to the EVM.
10) Turn on the shutdown supply and verify that the output goes to a straight
line (as shown in Figure 2--7) centered on zero volts, and the current on
both current meters indicate below 5 mA.