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SCAN:PORT [ROUTe:]SCAN:PORT <port> enables/disables the tree isolation switches.
SCAN:PORT ABUS closes the appropriate tree switches (for analog bus
connections). The
[ROUTe:]SCAN:PORT NONE command disables the tree
switches and leaves them open. With
SCAN:PORT NONE the closed
channels can only be measured through the respective bank direct terminals.
Parameters
Parameter Name Parameter Type Range of Values
port
Discrete ABUS | NONE
Comments • Order of Command Execution: The [ROUTe:]SCAN:PORT
command must be executed before the [ROUTe:]SCAN <channel_list>
and [ROUTe:]CLOSe <channel_list> commands.
• *RST Condition: [ROUTe:]SCAN:PORT NONE
Example Selecting the ABUS Port
TRIG:SOUR EXT Selects external trigger source.
SCAN:MODE FRES Selects the 4-wire ohms scanning
mode.
SCAN:PORT ABUS Selects the analog bus port.
SCAN (@100:107) Sets channel list.
INIT Starts scanning cycle.
SCAN:PORT? [ROUTe:]SCAN:PORT? returns the current state of the analog bus port.
The command returns
NONE if the analog bus connection control relays are
disabled or
ABUS if the control relays are enabled.
Example Query Scan Port
This example selects the analog bus port, then queries the state. Because
the analog bus port is selected, the query command returns
ABUS.
SCAN:PORT ABUS Selects the analog bus port.
SCAN:PORT? Query the port selection.
68 HP E1351A/53A 16-Channel FET Multiplexer Command Reference Chapter 5