Operating instructions

Language Dictionary
56
The present resistance level of each channel changes from the present level to the pending
level on any of the following:
■ On a TRIG[:IMM] command (always).
■ On receipt of an external trigger signal (if TRIG:SOUR is set to EXT).
■ On the next line voltage cycle (if TRIG:SOUR is set to LINE).
■ On receipt of *TRG (unless TRIG:SOUR is set to HOLD).
■ On receipt of a GPIB <GET> (if TRIG:SOUR is set to BUS).
■ On the next trigger timer pulse (if multiple electronic load is set to TRIG:SOUR
TIM).
The programmed resistance level (whether IMMediate or TRIGgered) can be implicitly
changed with a RANGe command (refer to Chapter 3 - Introduction to Programming for
information concerning value coupling).
Command Syntax
RESistance[:LEVel][:IMMediatel <NRf+>
RESistance[:LEVel] :TRIGgered < NRf+ >
Parameters
See Table 4-1 and the Operating Manual of the electronic load model.
Note
The higher values of resistance levels have less resolution. Programmed levels are set to
the nearest value obtainable by the hardware.
Status and Errors
TRIGgered level commands affect bits in the STATus OPERating CONDition and
STATus CHANnel CONDition registers (See Chapter 5 - Status Reporting).
Programmed resistance values outside the value range generate an error (See Table 4-2 at
the end of this chapter). The correct resistance range must be programmed before the
resistance level is programmed. Note from the parameters that there is considerable
overlap between the middle and high ranges, but no overlap between the low and middle
ranges.
Value Coupling
If RES:RANGe is set to a range that is below either type of LEVel, then that LEVel will
assume the MAX value of that range.
Examples
RES 25 Immediate commands for 25-ohm input
RESISTANCE:LEVEL 25
RES:TRIG: . 025 Commands for 25 milliohm input on
RESISTANCE:LEVEL:TRIGGERED 25E-3 occurrence of a trigger
RES:IMM .1;TRIG 1 Set input to 100 milliohms now and to 1 ohm
when trigger occurs
Query Syntax
RES? RES? MAX RES? MIN
RES:TRIG? RES:TRIG? MAX RES:TRIG? MIN
Returned Parameters
<NR3> RES? and RES:TRIG? return the presently programmed input resistance levels.
After a trigger or ABORt, RES:TRIG? returns the same value as RES?.
RES? MAX, RES? MIN, RES:TRIG? MAX and RES:TRIG? MIN return the
maximum and minimum programmable RES and RES:TRIG values for the present range.
Related Commands
ABOR RES:RANG TRANsient Subsystem