Chapter 5 Remote Interface Reference

Scanning With an External Instrument

ROUTe

:CHANnel:FWIRe {OFFON} [,(@<ch_list>)] :CHANnel:FWIRe? [(@<ch_list>)]

This command is valid only when the internal DMM is disabled or removed from the HP 34970A.

Configure the list of channels for 4-wire external scanning without the internal DMM. When enabled, the instrument automatically pairs channel n with channel n+10 (34901A) or n+8 (34902A) to provide the source and sense connections. For example, make the source connections to the HI and LO terminals on channel 2 and the sense connections to the HI and LO terminals on channel 12. Specify the paired channel in the lower bank (source) as the scan_list channel.

Note that the ROUT:CLOSe, ROUT:CLOSe:EXCL, and ROUT:OPEN commands ignore the current ROUT:CHAN:FWIRe setting (if no channels are in the scan list).

The :FWIR? query returns a “0” (4-wire pairing disabled) or “1” (4-wire pairing enabled) for each channel in the scan list.

INSTrument

5

 

:DMM {OFFON}

 

:DMM?

 

Disable or enable the internal DMM. When you change the state of the

 

internal DMM, the instrument issues a Factory Reset (*RST command).

 

The :DMM? query returns the state of the internal DMM. Returns “0”

 

(disabled) or “1” (enabled).

 

INSTrument:DMM:INSTalled?

 

Query the instrument to determine if the internal DMM is installed.

 

Returns “0” (not installed) or “1” (installed).

 

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