AA 501
OPERATING INSTRUCTIONS
Section 2
Change the following on page 2-2:
@
INPUT LEVEL RANGE to
@
INPUT
RANGE
Add the following on page 2-2:
@
RESPONSE
.
.
.
(rms calibrated for sinewaves)
oh qwi-peak in Opfion
02.
Add the following on page 2-2:
@
.
.
.
(Option 01
oh
02
instruments only)
Add the following on page 2-4:
@
30
kHz
LO PASS,
22.4
Hz to
22.4
kHz in Option 02
...
all functions.
Openata
o&y.uLith
Q-PK
RESPONSE in Option 02 irtn,Otwnentn.
Add to page 2-5, paragraph one under heading LEVEL MEASUREMENTS:
...
depending on the position of the RESPONSE pushbutton.
OpZLon 02 inafiumentn
phovkie an
ma
04
Q-PK
haponbe. Tkin
h
uneduR doh nohe meanwrementn.
Add to page 2-6,
paragraph six:
I
. . .
frequency dependent weighting network.
Opfion 02 inb,Otwnentn phovide ~L~X~AA
cotlhaponding Ro
CCIR
and
DIN
a&ndan&.
Thae inn,Otwnen& employ a quai-peak
deLec/totr uneduR in mwWLing puk node ampLiXuden
a.t
audio 6hequencia.
The
AA 501 provides several..
.
Add to page 2-11, before FILTERS section:
NOISE MEASUREMENTS USING THE
Q-PK
DETECTOR
To make
nohe meauhemed, ndect an INPUT
RANGE
Rhat adequatdy cowem the ex-
pected
peak nohe vomge.
AA
Rhe pe~h nohe may be conbidehzbly
ghdm
than
the
avmage node level in the chclLittry Rhe DECREASE
RANGE
figkt
may be ,d%mina.ted
doh moat mauuheme&. Do not une the
AUTO
RANGE
poaLibn
504
Rhae nohe memuhe-
.
me& an the inb,Otwnent hapod
a3
Rhe peak meawreme&. SelecA: &ha the
22.4
Hz
to
22.4
kHz unweigkted huponne o& the
CCZR
WTG
&X.~~AA.
The henpame cwrva doh
thue
&ikXm
ahe ahown in
Fig.
2-9.
The
CCZR
WTG
&L&~A
h
uneduR when mauwLing
nubjective nohinaa
06
audio equipnenf.
Foh mohe in~omaLion, hedm Ro the phe-
viounly mentioned
CCIR
and
DIN
aiandah&.
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