HP E8402A, User And Service Manual, Page: 187 / 249

Calibrating and Verifying Performance 189 Chapter 4
Chapter 4
Calibrating and Verifying Performance
The procedures in this chapter describe how to calibrate and verify the Enhanced
Monitor functions of the HP E8402A and E8404A VXI Mainframes. The SCPI
calibration commands are described in this chapter; for details on SCPI
programming, refer to Chapter 3.
Recommended Test Equipment
Table 4-1 lists the test equipment recommended for calibrating and verifying the HP
E840x Enhanced Monitor. Essential requirements for each piece of equipment are
described in the Requirements column. Other equipment may be substituted as long
as it meets the requirements listed.
Functional Verification
The functional Verification test for the Enhanced Monitor consists of sending the
*TST? command and checking the response. This test verifies that the device is
connected properly and is responding to commands. Periodically, TEST:TIMe and
TEST:BLOW should be executed; these are not included in the *TST? tests.
Procedure
1. Verify that the computer is connected to the Enhanced Monitor through an
RS-232 cable. Ensure baud rate and other parameters are correct. Alternately,
you can send the command through the system commander.
2. Send the
*TST?
command to the monitor.
3. The monitor will return an error code and message. A zero (0) indicates no
errors and the self-test passed. Any non-zero code indicates a self-test failure.
Refer to
TEST:ALL for an explanation of the error codes. Executing
TEST:RES:VERB?
following a test command, returns a string describing the
result.
Table 4-1. Recommended Test Equipment
Instrument Requirements Recommended Model
DC Voltmeter
DC Volts to
±
24 V
HP 34401 DMM
HP E1412 VXI DMM
Frequency Counter Period measurement
10 mS
±
0.1
µ
s resolution
HP 53131 Universal Counter
HP E1420 VXI Universal Counter
Temperature Sensor
(optional)
±
0.1 ° C resolution
RTD preferred
+5Vdc Power Supply
(for Enhanced Monitor
RS-232 port) +5 V DC 1.5 amp (max)