Pbp3 overrides vref settings full#

Each figure is shown at the full range and at a detailed range. Each equation is represented by a closed polygon. Combining these with the gain equations, the overall linear scope operation range is shown Figure 11 and Figure 12. The above adds an equivalent offset voltage V off eq in to V in diff, translating the ranges in ( 21 ) and ( 22 ) by V off eq in, up to the limits in ( 24 ).Д®quations ( 2 ), ( 7 ), ( 8 ), ( 12 ), and ( 19 ) show signal range boundaries for keeping ICs in the input/output voltage ranges. The vertical position setting moves the signals vertically on the scope screen (relative to vertical screen center) by V off eq in: The effect of the offset setting (scope vertical position) can be calculated from ( 10 ), ( 11 ) and ( 14 ):

Pbp3 overrides vref settings software#

To cover component value tolerances and to allow software calibration, only the ranges below are specified.

In equation ( 3 ), the type index is also missing, because Vmux and Vin refer to any of P (positive), N (negative) or diff (differential) values.Д¬ombining Gain equations ( 3 ), ( 5 ), ( 9 ), ( 13 ), ( 14 ), and ( 15 ) from previous chapters, the total scope gains are:Д¬ombining the ADC input voltage range shown in ( 19 ) with V off SC at the midrange of ( 11 ) (scope vertical position at 0), the Vin range is: As examples, in equation ( 4 ) below, V_(in diff) does not contain the instrument index (which by context is understood to be the Scope), nor the channel index (because the equation applies to both channels 1 and 2). For example, the Scope Input Divider and Gain Selection schematic is only shown for channel 1 since the schematic for channel 2 is identical. In the sections that follow, schematics are not shown separately for identical blocks. The WaveForms software uses these parameters to correct the acquired data and the generated signals. Instead, a calibration operation is performed at manufacturing (or by the user), and parameters are stored in memory. Except for the вЂњProbe CalibrationвЂќ trimmers in the scope Input divider, the Analog Discovery includes no analog calibration circuitry. The Calibration Memory stores all calibration parameters.

Pbp3 overrides vref settings Pc#

After that, it performs the data transfer between the PC and FPGA. The USB controller interfaces with the PC for programming the volatile FPGA memory after power on or when a new configuration is requested. Under the FPGA control, power for unused functional blocks can be turned off. The control block also monitors the device power consumption for USB compliance (all power for the Analog Discovery is supplied via the USB connection). The Power Supplies and Control block generates all internal supply voltages and user supply voltages.

Pbp3 overrides vref settings generator#

The Digital I/O block exposes protected access to the FPGA pins assigned for the Digital Pattern Generator and Logic Analyzer. The Analog Inputs/Scope instrument block includes:ДЄ precision Oscillator and a Clock Generator provide a high quality clock signal for the AD and DA converters. Analog voltages are prefixed with a вЂњVвЂќ (for Voltage), and suffixes and indexes are used in various ways: to specify the location in the signal path (IN, MUX, BUF, ADC, etc.) to indicate the related instrument (SC, AWG, etc.) to indicate the channel (1 or 2) and to indicate the type of signal (P, N, or diff). Signal and equations also use certain naming conventions. Signals in the Analog Output block, also called AWG, use вЂњAWGвЂќ indexes, and signals in the Digital block use a D index вЂ“ all the instruments offered by Discovery and Waveforms use the circuits in these three blocks. Signals in the Analog Input block, also called the Scope, use вЂњSCвЂќ indexes to indicate they are related to the scope block. The Waveforms software works with the FPGA to control all the functional blocks of the Analog Discovery, including setting parameters, acquiring data, and transferring and storing data. Once programmed, the FPGA communicates with the PC-based Waveforms software via a USB2.0 connection. The Waveforms software automatically programs DiscoveryвЂ™s FPGA at start-up with a configuration file designed to implement a multi-function test and measurement instrument.

The core of the Analog Discovery is the Xilinx Spartan 6 FPGA (specifically, the XC6SLX16-1L device).

USB Scopes, Analyzers and Signal GeneratorsДЄnalog DiscoveryвЂ™s high-level block diagram is presented in figure 2 below.