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) jDIN-Noise weighting filter (dBA)

. CCIR-Noise weighting filter 1000-Hz-Filter

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

rectification,themeasuringrangeandthefilters
Measurement

 

 

 

 

 

 

 

 

'

'

' range:

 

Frequeney

range

 

 

Modeof i

 

 

 

 

 

 

 

'1

 

mV-I 30fAV 1000'CCIRI22Hz'10Hz'

 

I reetifieation

Standard,

Filter

Filter-

I

 

I

Hz

468 a.

22

100

10Hz

 

 

 

 

,100 V

300 fAV

 

 

 

 

 

 

 

 

1 Standard

i

 

300 V

 

1 dB (A)

kHz

1kHz

1 MHz

1

RMS

DIN 45402 and

OFF

 

'I

X

 

 

 

 

X

 

DIN 45500

 

 

 

 

 

 

 

 

 

2

RMS

"

OFF'

 

i X

X

 

 

 

X

 

3

RMS

"Unw.

 

 

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.

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

20

 

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r

 

 

 

 

 

 

 

 

 

 

 

 

 

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UPM 550 Optional

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

~Iug-in filters

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

330Hz band pass 3000 Hz band pass

Freq.-deviation meter for Infrared sound transmission Rumple welghting filter to DIN 35539

 

 

-

 

 

 

 

5 101 2

S 102 2

5 103 2

S 104 2

S lOs 2

5 106 2

Hz

Accessories

Series transformer RVZ 11-1 (Artiele-No. 1585) for balaneed measurements within the AF-frequeney range.