4-30 Keysight B2961A/B2962A User’s Guide, Edition 3Front Panel ReferenceConfig key groupExternal FilterType Filter type, HC-ULNF, ULNF, or LNF.HC-ULNF: Keysight N1294A-020 high current ultra low noisefilterULNF: Keysight N1294A-021 ultra low noise filterLNF: Keysight N1294A-022 low noise filterFor using the external filter, see “Using the Low Noise Filter” on page 3-19 and“Output Filter and External Filter” on page 6-12.Sweep dialog boxThis dialog box provides the following parameters for setting details of the sweepsource operation.Ch Only on 2-channel models. Channel 1 (Ch 1) or 2 (Ch 2)This field specifies the channel set by this dialog box.Sweep Ranging Ranging mode used for the sweep source operation, BEST,AUTO, or FIXED. See Table 4-4 on page 4-31.Sweep Direction Sweep direction, UP (start to stop direction) or DOWN (stopto start direction)Output after Sweep The value the source channel applies after it completes thesweep outputSTART VALUE (START): The source channel changes theoutput to the DC output value just before applying the sweepoutput start value.END VALUE (END): The source channel keeps the outputvalue when the sweep output is stopped.