Sennheiser UPM 550 User Manual download pdf (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

.1000 Hz-STOP-Filter (in series only for UPM 550-1)

5 101 2 S 102 2

103 2

S 104 2

S lOs 2

5 106 2 Hz

Frequency range of the Universal Level Meter UPM 550 in dependencefrom the used mode of

rectification,themeasuringrangeandthefilters Measurement

' range: Frequeney range

Modeof i '1 mV-I 30fAV 1000'CCIRI22Hz'10Hz'

reetifieation Standard, Filter

Filter- ,100 V 300 fAVI Hz

468 a. 22

100 10Hz

Standard

i 300 V dB (A) kHz kHz 1 MHz

1 RMS DIN 45402 and OFF

I X X

DIN 45500 '

2 RMS " OFF' X X

3 RMS "Unw.

i X X X

4 RMS " 1000 Hz X X X

5 RMS " CCIR DIN 45405 X X X

6 RMS " db (A) DIN 45500 X X X

7 RMS "Ext. X X X

8 RMS " Res. 1 a. 2 X X X

9 Peak DIN 45405 OFF X ' X

10 Peak DIN 45405 OFF X X

11 Peak DIN 45405 1000 Hz X X X

12 Peak DIN 45405 CCIR DIN 45405 X X X

13 Peak DIN 45405 dB (A) ,DIN 45500 X X X

14 Peak DIN 45405 Ext. 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 eon-

strueted 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.

dB 0

-10

-20

-30

-40

-50

((IR

468.-<

FILTERAUSIOfF

d8(A)

mV V

#1'

FREMD

,STOP

..V

UNW

.1kHa

'li

'CI

, .'

PASS

(;

\ \\

1kHz

(ö:I'

0 0

1 2 3 4 5 6 7 8 9 10 11 12 13 14

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Sennheiser UPM 550 User Manual Page 9

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