Änderungen vorbehalten / Subject to change without notice
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1.3 Talk-Only mode
In this mode IEEE-488 devices can be used for documentation, which are set to ”listen
only” mode. In that case an IEEE-488 controller is not required.
There are two types of documentation in ”talk only” mode:
1.3.1 Manually started documentation in ”talk only” mode
Prerequisite switch SW1 is in position ”0, 1, 2 or 3” and switch SW2 is in position ”0”,
the documentation can be started by briefly pressing the ”start” pushbutton or by the
corresponding command received by the RS-232 port.
1.3.2 Automatic documentation in ”talk only” mode
This mode is present if switch SW1 is set to values between ”0 and 3” and switch SW2
is in position ”F”.
Oscilloscope and interface must be prepared for automatic documentation in the
following manner. First the oscilloscope must be set to SINGLE mode and thereafter the
RESET pushbutton must be pressed briefly to activate the trigger unit. After a trigger
event has started the signal capture and the recording is completed (RESET-LED dark),
the ”start” pushbutton located on the interface must be pressed to cause documentation.
Thereafter the oscilloscope trigger unit is reset automatically. From now on each trigger
event causes documentation. In this mode the interface has to detect the presence of
a completed recording. Each query causes the “RM“-LED to light.
1.4 RS-232-Port
This bidirectional port enables bit serial
data transfer
from and to a PC, but can also be
used for
documentation
(e.g.
plotter, printer). The connections of the RS-232 port (9 pole
D-Sub female) can be seen in the appendix.
The signals at the RS-232 port are assigned as follows:
Pin Function
2
Tx Data
3
Rx Data
7
CTS
8
RTS
5
Ground
For that reason a screened 9pole extension cable which is wired 1:1 can be used and a
null modem cable is not required. If e.g. the PC has a 25pole COM port, an adapter which
converts the lines must additionally be used at the COM port. Adapters like these are
available in computer shops.
1.4.1 Hardware configuration
The RS-232 port can be used for
documentation
purposes, if switch SW1 is active (not
overwritten by software configuration) and set to 4, 5, 6 or 7.
Data transfer
can be performed independent from the hardware configuration.
1.4.2 Software configuration
The setting of switch SW1 can be overwritten by a suitable command received by the
IEEE-488 or RS-232 port (data transfer). Subsequently the mechanical setting of SW1
becomes inactive until the oscilloscope is switched off for approx. 10 seconds.
