Microchip Technology HV7351, User Manual, Page: 17 / 35


2015 Microchip Technology Inc. DS50002375A-page 17
3. Connect the high-impedance probe(s) of the oscilloscope to the Tx output(s).
4. Power up the supplies according to the power-up sequence as indicated in
Table 2-2 .
5. After the HV7351 Board has been successfully powered up by following the
power-up sequence, enable the board by pressing the ENA button.
6. Change the output waveform and transmit frequency by pressing the WAVE and
FREQ buttons, respectively. An overview of Push Button Operations is provided
in
Table 2-3 .
7. The output waveform can be inverted by pressing the INVERT button. Table 2-4
lists all LED Indicators.
8. The transmission mode can be toggled by pressing the CW button. In CW-mode,
the typical waveforms are 16-cycle 5 MHz. To prevent the HV7351 Board from
overheating, the following parameters are recommended when setting V
PP
/V
NN
voltages in CW-mode:
• +3V

V
PP

+8V
• -3V

V
NN

-8V
TABLE 2-2: SUPPLY POWER-UP SEQUENCE
Step Name Description
1 +VCC +3.3V positive logic supply voltage for HV7351 Board V
LL
and
CPLD V
CC
2 +VDD +5.0V positive power supply
3 -VSS -5.0V negative power supply
4 +VRP +5V to +12.0V positive CW power supply
5 -VRN -5V to -12.0V positive CW power supply
6 +VPP +3V to +70V positive high voltage supply
7 -VNN -3V to -70V positive high voltage supply
TABLE 2-3: PUSH BUTTON OPERATIONS
Button Description
WAVE Toggle select pulse waveforms
FREQ Toggle select B-mode demo frequency
INVERT Toggle select non-inverting or inverting waveform
CW
Toggle select CW-mode or B-mode ( Note 1 )
ENA Toggle ON or OFF HV7351 Board enable signal EN
Note 1: In CW-mode, V
PP
/V
NN
voltages must be reduced to

±8V
TABLE 2-4: LED INDICATORS
LED Description
CW CW-mode indicator
INVERT Inverting waveform output indicator
PWR
V
LL
3.3V and CPLD chip V
CC
power supply ON indicator
ENA IC-enabled indicator. CPDL power-up default is OFF