Scanning Channels

Example: Scanning Using Trig Out Port

Scanning channels consists of closing a set of channels, one channel at a time. You can scan any combination of channels for a single-multiplexer or multiple-multiplexer switchbox.

Single, multiple, or continuous scanning modes are available. Any switching configuration can be used for scanning. See Chapter 4.

This example shows one way to synchronize instrument measurements of DUTs with RF multiplexer channel closures. For measurement synchronization, the HP E1300A/E1301A Trig Out BNC port is connected to the instrument External Trigger In port. See the following figure for typical user connections.

For this example, the mainframe and instrument are connected via HP-IB with mainframe address of 709 and instrument address of 722. The RF multiplexer is at logical address 120 (secondary address 15). (You must add required instrument commands to line 10.)

10

OUTPUT 722;"TRIG EXT;...."

! Ext triggering

20

OUTPUT 70915;"OUTP ON"

! Enable Trig Out

30

OUTPUT 70915;"TRIG:SOUR BUS"

! Bus triggering

40

OUTPUT 70915;"SCAN (@100:103)"

! Scan channels

50

OUTPUT 70915;"INIT"

! Enable scan

60

FOR I=1 TO 4

! Start loop

70

ENTER 722;A

! Enter result

80

PRINT A

! Display result

90

TRIGGER 70915

! Advance scan

100 NEXT I

! Increment count

110 END

 

Figure 3-4. Scanning Using Trig Out Port

Chapter 3

Using the HP E1366A/E1367A RF Multiplexer Module 29

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HP E1367A, E1366A manual Scanning Channels, Example Scanning Using Trig Out Port