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Signal Output
HP-IL loopback test
RANGED versus FULL RANGE indicates the dynamic range for the
data to be transmitted to other devices on the loop; dynamic range for
RANGED data is set at the HP 5890 according to the setpoint for
RANGE 2
the detector itself. The choice of the type of data to be transmitted is
set at the controller.
HP-IL loopback test
The HPIL LOOPBACK TEST may be performed any time to verify that
HP 5890 INET communication is performing satisfactorily. Testing
involves setting up the HP 5890 to send an INET message directly to
itself by connecting its INET output to its INET input. The following
procedure is used:
1. Disconnect INET cables at their respective INSTRUMENT NETWORK
IN and OUT receptacles on the HP 5890 (located beneath the top right
cover panel).
2. Choose either one of the cables and disconnect it at the next device on
the INET loop.
3. Connect this free cable to both IN and OUT INSTRUMENT NETWORK
receptacles on the HP 5890.
4. Enter the following key sequence:
Upon pressing
and verifies a diagnostic message to itself through the connected cable.
Each press of
second. Figure 5•12shows displays to be expected.
90
!
. Dynamic range for FULL RANGE data is limited only by
( )
CLEAR
, the test is performed: the HP 5890 both sends
ENTER
repeats the test. Each test requires about one
ENTER
.
7
ENTER
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Troubleshooting
