User manual

5-30 Delta, Pulse Delta, and Differential Conductance Model 6220/6221 User’s Manual
Return to Section 5 topics
To set the measurement units, press the UNITS key to display the
READING UNITS menu. Select VOLTS, OHMS, WATTS, or SIEMENS.
When WATTS is selected, you will then be prompted to select the power
units type: AVERAGE or PEAK. Measurement units can be changed while
Pulse Delta is running.
6. On the Model 622x, press the PULSE key to arm Pulse Delta.
The Model 622x is armed when the message “PULSE MODE ARMED
Press TRIG to start” or “PULSE SWEEP ARMED Press TRIG to start” is
displayed briefly and the ARM annunciator turns on.
7. On the Model 6221, press the TRIG key to start taking Pulse Delta readings
and send them to the buffer.
If a finite Pulse Delta count is being used, the Pulse Delta measurements
will stop after the last Pulse Delta measurement is performed. However,
Pulse Delta remains armed and can be run again by pressing the TRIG key.
The new Pulse Delta readings will overwrite the old readings in the buffer.
If the infinite Pulse Delta count is being used, Pulse Delta will run
continuously. If the buffer fills, Pulse Delta readings will stop being stored,
even though Pulse Delta continues to run.
8. When finished, press EXIT to disarm Pulse Delta.
9. On the Model 6221, press RECALL to access the Pulse Delta readings
stored in the buffer.
Operation – PC control
The system configuration for PC control of the Model 6221 is shown in
Figure 5-2B on page 5-5.
1. Connections are shown in the following illustrations. All power must be
removed from all components in the system before making connections:
• Figure 5-4, page 5-7 – System connections
• Figure 5-5, page 5-8 – Test connections
2. Configure communications for the Models 2182A and 6221 as explained in
“Configuring communications” on page 5-9.
3. On the Model 2182A, select the desired measurement range. For front
panel operation, use the RANGE keys to select the measurement range.
Commands from the PC to control the Model 2182A are addressed to the
Model 622x. Each command is then routed through the Model 622x out the
serial port (RS-232) to the Model 2182A. The following command word is
used for this communication process:
SYSTem:COMMunicate:SERial:SEND <data>
Where: <data> is a valid Model 2182A command.