Operating the Meter Using the Computer Interface | 5 |
How the Meter Processes Output |
How the Meter Processes Output
The following paragraphs summarize how the meter processes output. The meter outputs an alphanumeric string in response to a query command from the host. (Query commands are easily identified because they all end with "?".) An output string is terminated by a Carriage Return and Line Feed (<CR><LF>) for
After sending the meter a command via the
If the meter is part of an
Numeric output from the meter is displayed as shown in the following examples:
EXAMPLE | EXPLANATION |
+1.2345E+0 | Measured value of 1.2345 |
+1.2345E+6 | Measured value of 1.2345 x 106 |
+12.345E+6 OHM | Measured value of 12.345 x 106 ohms (format 2) |
+lE+9 | Positive overload (OL on the display). |
Negative overload (OL on the display). |
Triggering Output
The meter takes measurements when it is triggered to do so. The five trigger types available on the meter (see Table
•An "internal trigger" triggers measurements continuously.
•An "external trigger" triggers a measurement only at the direction of the user. A measurement can be externally triggered in four ways:
•External trigger with rear trigger disabled (Trigger type "2" or "3" from Table
•External trigger with rear trigger enabled (Trigger type "4" or "5" from Table
•
•
External Triggering from the Front Panel
To enable an external trigger and trigger a measurement from the front panel, perform the following procedure:
1.Make sure that the
If the
If the