Panasonic VP-7721A Manual

NOTEi33oCNJo. t; ooi ooiCD_ ■'*3Because connection is made as shown in Fig. 4-1, outputfrom the oscillator is not terminated with a 600-ohmload. Inserting a 600-ohm termination pad at the INPUTA connector causes the level meter to read the valuedisplayed on the digital display in dB or dBm.Otherwise, the level meter indicates a value 6 dB higherthan the value displayed on the digital display for bothdB and dBm. That is-',- the unloaded output of the oscil¬lator is measured.19) Use the meter @ at the right to measure the level. Ignore thesmall meter (7), which reads the same as the large meter in the0.3 v (-10 dB) range or higher.20) The range is switched automatically near the points indicated bythe arrows (+} in Fig. 4-2.Visually check the meter pointerto see if the output amplitudeof the oscillator on theanalyzer can be changed overmany ranges-21) Press the RANGING key (G) toselect the range manually withthe LED in the key on. TheMEASUREMENT RANGE select keys(A and T) (13) are used toshift the range upward ordownward respectively.Pressing a key causes the rangeDownrange UprangeFig. 4-2 Range switching pointsto be switched by one range; andholding a key causes the range to be switched continuously with aslight delay.The INPUT RANGE OVER/UNDER keys @ of the same type are disabledsince they are not required for level measurement.22) When an oscilloscope is connected through the MONITOR OUTPUT connector (G) , the waveform of a level measured signal (in this casethe 1-kHz sine wave output from the oscillator) can be observed.Make sure that the monitor output anplitude varies proportionally4-12