Remote Control; Interfaces; Setup Of The Commands; Listing Of Commands - Rohde & Schwarz HAMEG HM8123 Benutzerhandbuch

Remote control

6 Remote control
6.1

Interfaces

The HM8123 comes with a USB/RS-232 interface, as an
option the IEEE-488 GPIB interface is available. We recom-
mend the installation ex factory.
RS-232 Interface parameters:
9600 baud, no paritybit, 8 data bits, 1 stop bit
The interface parameters are fixed and cannot be changed.
USB interface
You do not have to change the configuration. If required,
the baud rate can be changed. Connect the HM8123 with
your PC using a USB cable and install the USB drivers like
described in the manual of the USB interface HO820.
GPIB interface
Connect the HM8123 with your PC using a GPIB cable. It
is necessary to set the GPIB adress of the HM8123 to the
desired value. The adress is changed at the interface on
the rear panel. Do this settings only before starting the in-
strument. It is not possible when the instrument is running.
6.2

Setup of the commands

A message to the HM8123 may consist of several com-
mands. The commands have to be separated by semico-
lon (;). After receiving a CR (0x0D) the HM8123 will start to
work on the commands received. The commands my con-
tain upper and lower case characters. The commands will
be executed in the order they were received. Any com-
mands which can not be executed in the mode selected
presently will be ignored (e.g. the command „Set measu-
rement time" (SMTxxxxx) would be ignored if the event
counting mode was selected.)
6.3

Listing of commands

6.3.1 Functions

With these commands the measurement functions are
selected.
FRA Frequency channel A (FREQ A)
FRB Frequency channel B (FREQ B)
FRC Frequency channel C (FREQ C)
PRA Period channel A (PER A)
WDA Pulse width channel A (Width A)
RAB Frequency ratio A/B (A:B)
DTA Duty cycle channel A
TI1 Time interval A to B (TI A to B)
TIA Time interval A to B averaged (TIavg A to B)
PHA Phase A to B (Phase A to B)
RPM rpm measurement channel A (RPM A)
TOT Event counting channel A (TOTAL A)
26

6.3.2 Control of measurements

With these commands parameters may be changed.
Attenuators
Activates/deactivates the attenuators, corresponds to
pushbuttons 1 : 10 and
13
AA0 Attenuator channel A off
AA1 Attenuator channel A 1 : 10
AA2 Attenuator channel A 1 : 100
AB0 Attenuator channel B off
AB1 Attenuator channel B 1 : 10
AB2 Attenuator channel B 1 : 100
Slope
Selection of trigger slope, corresponds to pushbutton
SLOPE .
15
SA0 Positive slope channel A
SA1 Negative Slope channel A
SB0 Positive slope channel B
SB1 Negative slope channel B
Low pass filter 50 kHz
Activates/deactivates the low pass filer, corresponds to
pushbutton LP 50 kHz
18
FA0 Low pass filter 50 kHz channel A off
FA1 Low pass filter 50 kHz channel A on
FB0 Low pass filter 50 kHz channel B off
Fb1 Low pass filter 50 kHz channel B on
Coupling
Selection of coupling, corresponds to pushbutton DC
ACA AC coupling channel A
DCA DC coupling channel A
ACB AC coupling channel B
DCB DC coupling channel B
50 Ω
Selection of input impedance, corresponds to pushbutton
50 Ω .
17
OAH Input impedance channel A 1 MΩ
OAL Input impedance channel A 50 Ω
OBH Input impedance channel B 1 MΩ
OBL Input impedance channel B 50 Ω
Trigger level
Selection of trigger level, corresponds to pushbuttons LE-
VEL A and LEVEL B
12 11
LVAxxxx Setting of channel A trigger level
(xxxx: ±0.001 to ±200.0 V)
LVBxxxx Setting of channel B trigger level
(xxxx: ±0.001 to ±200.0 V)
Gate time
Setting of gate time, corresponds to pushbutton GATE
TIME .
10
SMTxxxx Setting of gate time in ms (xxxx: 1 .... 65,535 ms)
16
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14