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Subject to change without notice
Front Panel HM507
RS-232 protocol
N-8-2
(no parity bit, 8 data bits, 2 stop bits, RTS/CTS hardware
protocol).
Baud-Rate Setting
After the first
POWER UP
(switching on of the oscilloscope )
and the first command
SPACE CR
(20hex, 0Dhex) sent from
the PC, the baud rate is recognized and set automatically
between 110 baud and 115200 baud. The oscilloscope is then
switched over to
REMOTE
control mode. The oscilloscope
then transmits the
RETURNCODE: 0 CR LF
to the
PC
. In this
status all settings (with the exception of those functions
mentioned under ”Controls and Readout”) can be controlled
via the interface only.
The only ways to quit this status are:
Switching the oscilloscope off,
or transmitting the command
RM= 0
from the PC to the oscilloscope, or
depressing the
AUTOSET ( LOCAL )
pushbutton,
if in unlocked condition (command LK=1... was not sent)
After the remote state has been switched off the RM LED is dark.
Please note:
A minimum time must elapse between the commands RM=1...
(remote on) and RM=0... (remote off) and vice versa.
The time can be calculated with the formula:
tmin = 2x (1/baud rate) + 60µs.
If at the beginning no
SPACE CR
command is recognizable,
the oscilloscope pulls the TxD line low for approx. 0.2ms and
causes a break on the PC.
Data Communication
After successfully being set to remote control mode, the
oscilloscope is prepared for command reception.
A data carrier with programming examples, a command list
(tools) and a program executable under Windows 95, 98, Me,
2000 and NT 4.0 (with Service Pack 4 or higher) is part of the
delivery.
