User`s manual

118 Agilent E8462A Scanning Voltmeter Application Examples Chapter 4

Reset Conditions

This section describes the power-on and reset condition the E8462A switch

module is in when a “scanning voltmeter” reset occurs. The “VOLTMTR”

device driver controls both the voltmeter and any switch module configured

with it in a scanning voltmeter configuration. At power-on or following the

reset of a scanning voltmeter (

*RST command sent to the voltmeter address),

all 256 channels and the tree relays are open. All E8462A routing relay

common terminals are set to the normally closed contact. In addition, after

*RST command, the current scan channel list is invalidated. See the

Agilent E1326B/E1411B 5½-Digit Multimeter User's Manual for the reset

conditions of the multimeter.

Table 4-1 lists the parameters and default values for the switch module

functions following power-on or reset. These are not accessible to you via

the “VOLTMTR” driver but are provided so you know the switch module

condition after power-on or following a reset

Figure 4-1. "Scanning Voltmeter" Configuration