Sennheiser UPM 550 Instructions for Use - Page 9

Measurement examples Measurement: Harmonie distortion of tape-recorder under use of 1 kHz filter (1 kHz pass). 1. Press button "RMS" and "Filter Off". 2. Measure level of a reeorded 333 Hz-signal at the tape-recorder output. 3. Press button "1 kHz" filter. 4. Measure 1 kHz eontent (3rd harmonie of 333 Hz) If the 333 Hz level amounts to e. g. 100 mV and the 1 kHz level to 4 mV the harmonie distortion eorresponds to 4 %. Through a limited slope of the 1 kHz filter only harmonie distortions of ~ 1 % ean be measured. Measurement: Harmonie dlstortion with 1 kHz harmonie distortion filter (1 kHz STOP). 1. Press button "RMS" and"Filter Off". 2. Measure 1 kHz level at the test piece output. 3. Press button "Res 1" or "Res 2" (UPM 550) resp. button "1 kHz - STOP" (UPM 550-1). The harmonie wave level ean be read direetly. At this measurement it must be eonsidered that the UPM 550 resp. UPM 550-1 ean not be overloaded more than 50 dB above fundamental wave level. But 50 dB eorresponds to a harmonie distortion indieation of 0.3 % at full seale defleetion. Therefore harmonie distortions down to ~ 0 1 % are still readable. External Filters The rear panel is fitted with two BNC-eonneetors (18) and (19) for eonneetion of suitable external filters. If this faeility is to be used, the button (14) EXT must be pressed. Please note that the input as weil as the output of the external filter eonneetors have an irnpedanee of 60Q Q. The attenuation through external filters rnay be eorreeted by means of the potentiometer eontrol (20) "EXT. FILTER CAL. 0 dB" on the rear panel. Sinee almost all filters have zero-attenuation at 1000 Hz easy reealibration is possible with the built-in test oseillator. Filter Characteristics and Frequency Response of the UPM 550 OFilter OFF DIN_weighting filter (Unweighted noise) DIN-Noise weighting filter (dBA) . CCIR-Noise weighting filter 1000-Hz-Filter j. 1000 Hz-STOP-Filter (in series only for UPM 550-1) 20 10 dB 0 -10 -20 -30 -40 -50 I I r ((IR 468.-< . .- ' FREMD UNW I I I ,I / ,,II / 11 #1' / / d8(A) I ,.STOP .1 kHa . I \ I \ \ 'l.I.i,', \ I.'' FILTERAUSIOfF mV V - " -, . ..V 0 'CI / 1, / PASS 1kHz /' C1 0 0 0' (ö:I' - 5 101 2 S 102 2 5 103 2 S 104 2 S lOs 2 5 106 2 Hz Frequency range of the Universal Level Meter UPM 550 in dependence from the used mode of ' rectificationth, emeasuringrangeandthefilters ' Modeof i '1 Measurement ' range: Frequeney range mV-I 30fAV 1000'CCIRI22Hz'10Hz' 1 I reetifieation Standard, Filter 1 RMS DDIINN 4455540002 and OFF Filter1 Standard iI,100 V 300 fAVI 300 V I' X Hz 468 a. 1dB (A) 22 100 kHz 1 kHz X 10Hz 1 MHz 2 RMS 3 RMS 4 RMS 5 RMS " "Unw. OFF' X iX X X X " 1000 Hz XXX " CCIR DIN 45405 X X X 6 RMS " db (A) DIN 45500 X X X 7 RMS "Ext. X X X 8 RMS 9 Peak 10 Peak " DIN 45405 DIN 45405 Res. 1 a. 2 OFF OFF X X X' X X X X 11 Peak DIN 45405 1000 Hz X X X 12 Peak 13 Peak 14 Peak DIN 45405 CCIR DIN 45405 X X DIN 45405 dB (A) , DIN 45500 X X DIN 45405 Ext. X X X X X 15 Peak DIN 45405 Res. 1,2 X X X Besides the reetifier-filter eombinations given in the table above two further filters may be inserted eonstrueted on one plug-in board aeeording to eustomer speeifieations. The front-panel ineludes two pushbutton Res. 1 and Res. 2 already fully wired to aeeept the additional filterboard. UPM 550 Optional ~Iug-in filters UPM550-B17 UPM 550- B 17-1 UPM 550- B 17-2 UPM550-B17-3 UPM550-B17-4 UPM 550- B 17-5 UPM550-B17-6 UPM 550- B 17-7 UPM 550 - B 17-8 UPM550-B17-9 UPM550-B17-10 UPM550-B17-11 UPM550-B17-12 UPM550-B17-13 UPM550-B17-14 UPM 550- B 17-15 UPM 550- B 17-16 UPM 550- B 17-F UPM 550- B 17-R BasIc board for option al plug-in filters Weighted nOlse-voltage filter to DIN 45405 (Version 1967) Rumple - unweighted noise voltage filter to DIN 45539 Rumple - weighted nOlse voltage filter to DIN 45539 CCITI telephone weighting filter Welghted noise filter lor FM-Stereo 1500 Hz band pass Weighted noise filter for TV-sound 100 Hz band pass 1000 Hz - harmonie distortion filter 19 kHz band pass 38 kHz band pass Filter to DIN 45301 with 19 kHz-trap (Unweighted noise) Weighted noise filter to CCIR 486-1 wlth 19 kHz-trap 30 kHz -Iow pass-filter 330 Hz band pass 3000 Hz band pass Freq.-deviation meter for Infrared sound transmission Rumple welghting filter to DIN 35539 Accessories Series transformer RVZ 11-1 (Artiele-No. 1585) for balaneed measurements within the AF-frequeney range.