Driver 1 Output Signal; Testing The Evm Setup - Texas Instruments SLOU106 User Manual

2.4 Testing the EVM Setup

1) Turn on the dc power supply.
2) Verify that both the +5 V (current meter 1) and the –5 V (current meter 2)
Caution:
Currents above 20 mA indicate a possible short or a wrong resistor value
on the PCB. Do not proceed until this situation is corrected.
3) Turn on the function generator.
4) Verify the oscilloscope is showing two 1 MHz sine waves with amplitude
Use Figure 3 as a reference for the input and output signals.
Figure 2–3. Driver 1 Output Signal
C1
C2
C3
2-4
currents are below 20 mA.
of 0.125 V. The dc offset of the signal must be below 50 mV.
Note: V and V should be 180 degrees out of phase. The internal
OUT+ OUT–
attenuation of the scope should be set to 6 dB for a gain of one. Otherwise,
the output will show a gain of one-half due to the voltage division occurring
at the 50- termination resistor.
THS4140
Using the THS4140 EVM