51
Table 6. Examples of Command Strings
Set all leading edges to 5ns
Command
TIME:DEL1 5NS;DEL3 5NS;DEL5 5NS;DEL7 5NS<CR ><LF>
Response
OK OK OK OK<CR><LF>
Query the VH of all channels (assume all channels are set to +5.00V)
Command
CHAN:VHI? A;VHI? B;VHI? C;VHI? D<CR><LF>
Response
+ 5.0 + 5.0 + 5.0 + 5.0<CR><LF>
Set the trigger source and frequency then start triggering
Command
TRIG:SOUR INT;FREQ 5K;:START<CR><LF>
Response
OK OK OK<CR><LF>
7.4
RS-232 Interface
The P400 standard configuration includes a nine-pin RS-232 connector for remote
operation. Select RS-232 mode on the Auxiliary menu by scrolling down to
Remote
mode:
and turning the spinner knob until
RS-232
is shown.
A standard serial cable (non-null modem) can be used to connect the P400 to a host
computer. Only TX, RX and GND are required for proper operation. For computers
that require hardware handshaking the P400 is configured for loopback mode. See
Figure 9-1 for the P400 connector wiring.
1
2
9
8
7
6
5
4
3
RX TX
GND
470
4
7
0
Figure 20. RS-232 Connector Pin-Out