GBS Elektronik MCA-527 Firmware Commands - Manual (Page 21)

Description of the MCA527 Firmware Commands
Command name CMD_SET_TTL_LEVELS
Compatibility New MCA527 command.
Execution right Necessary
Description The command allows to change the low level (ll) and the high level (hl) for TTL input signals. The low
level must be lower than the high level. The default levels are 0.8V and 2.0V, which are the standard
levels for TTL input signals.
Micro version
21 : low level = 6 … 23 * 0.1V, high level = 7 … 24 * 0.1V
Other versions: low level = 1 … 99 * 0.1V, high level = 2 … 100 * 0.1V
The command is ignored and responds with an error value if a measurement is still running.
Format integer integer integer integer integer integer
Parameter preamble command ll hl 0 end flag
Byte string (HEX) A5 5A 27 01 ll 00 hl 00 00 00 B9 9B
Command name CMD_SET_OSCI_TRIGGER
Compatibility New MCA527 command.
Execution right Necessary
Description The command allows to set source index (s), resolution index (r), threshold (t) and position (p) for the
oscilloscope mode.
s:
0 … 4
r: -5 … +13
t: 0 … 16383
p: 0 … 499
The oscilloscope mode is described in document: “MCA527 Oscilloscope Mode”.
Format integer integer char char integer integer integer
Parameter preamble command s r t p end flag
Byte string (HEX) A5 5A 11 01 s r t
l
t
h
p
l
p
h
B9 9B
Command name CMD_SET_CORE_CLOCK
Compatibility New MCA527 command (since firmware version 13.04).
Execution right Necessary
Description The command allows to set the core clock of the MCA527 processor.
Full, Lite and OEM version: clk:
1 … 6 * 100 MHz
Micro version: clk: 1 … 4 * 100 MHz
Format integer integer integer integer integer integer
Parameter preamble command clk 0 0 end flag
Byte string (HEX) A5 5A 2D 01 ckl
l
00 00 00 00 00 B9 9B
Remarks The default core clock is 400 MHz. This is sufficient in most cases. The change of the core clock is
only necessary in exceptional cases. Note, a higher core clock consumes more power.
21 Since firmware version 14.05, the command considered the special characteristic of the micro version. If pin AIN- and pin VCM
are tied together, a voltage from 0.5 to 2.5V can be applied between pin AIN+ and pin GND.
21