Apex Digital EK37, Руководство пользователя

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EK37
EK37U Rev A 7
TEST ASSEMBLY
EQUIPMENT NEEDED
1. Power supply
2. Function Generator
3. Oscilloscope
4. Proper heat sinking system (if operating at high current)
TEST SETUP
Connect the positive power supply to banana jacks P8 and P17. Since the negative supply is grounded,
connect the ground connection of the positive supply to jacks P9 and P16. Connect the auxiliary supply to
jacks P3, P4 and P5. Connect the BNC cable from the function generator to the BNC connector IN_A and/or
IN_B based on the required channel to be used. If using a reactive load, connect the RISO resistor to banana
jack Out_A1/Out_B1. If using a resistive load, connect the load to banana jack Out_A2/Out_B2. Out_A2 and
Out_B2 are shorted across the RISO resistor (refer figure 1). Refer to the amplifier datasheet for typical values
of input voltage, frequency and supply voltage. Input and output waveforms can be checked on an Oscillo-
scope by connecting it to the test points mounted on the board. Begin the test with minimum values of input
and supply voltage. Volt meters can be connected to banana jacks P6, P14 and P7, P15 to monitor the tem-
perature of each channel pf the MP104.
Note: For added precaution, power on the circuit with the amplifier removed. Check the voltage at each
cage jack without the DUT, for correct voltage / signal at each respective pin. Once this is done, plug
in the DUT and check for the correct signal
TEST RESULTS:
For the test, an 80nF capacitive load was used. The input is set to 1.5V, with a -200mV offset, and the out-
put is 97.5V. The test results can be seen in figure 5. The input of the amplifier is shown in Yellow color and
the output of the amplifier is shown in Blue color. The input of the amplifier is set with a fixed rising edge and
falling edge slew rate. The output is 65 times that of the input. The output current flowing through the capac-
itor is shown by the magenta colored waveform.