1.5 System Requirements
1.5.1 Supported Hardware
Meilhaus Electronic MEphisto Scope (models UM202 und UM203),
firmware-version from 2.10 on.
Both analog inputs are equipped with BNC-sockets for standard
oscilloscope probes. Each channel has its own 16-bit A/D-converter
that facilitates simultaneous sampling rates of up to 1 MS/s on
both channels. The digital port serves as input for the Logic-Ana-
lyzer. It can be found on the backside of the 26-pin plug connector.
The device is supplied with power via the USB-port of the PC. In
case it is connected to the PC via USB-hub, the hub needs its own
voltage supply. The device signals a current consumption of 490mA
max. This is required so that operation is safe even with shorts on
the digital port.
For the autonomous operation of the model UM203 an external
power supply with 5V, 500 mA is required. In this mode, the device
may also be supplied with a powered USB hub without connection
to the PC.
1.5.2 SD-Cards
1.5.2.1 General Information
The MEphisto Scope accepts SD-cards with a capacity range from
8
MB to 2
GB. A functioning of cards with a capacity of 8 MB or
16
MB cannot be guaranteed for all manufacturers. Capacities of
more than 2
GB are not supported.
1.5.2.2 Format
All SD-cards should be formatted prior to using them in the ME-
phisto Scope. Only if formatted, the cards may use the full range of
files or the full capacity for recording. This particularly affects
highly fragmented file systems that have often been described with
many small files.
The MEphisto Scope accepts the formats FAT16 and FAT32. Some
operating systems offer FAT32 as standard for data storing units
starting from 32.5
MB. However, FAT16 should generally be pre-
ferred. Otherwise, only limited functionality may be available.
