Crown D-75 - 4.4 1 M Distortion Test Se

9 (£(f'@(hMUll ____ _ --'O;:.."'75"PD="''''E"R."AM=PL" IF" 'E,,R '- _ _ _ _ _____ ---'R'''E,.,V'-'' . 0
Test or Adjustment
6. Inlcnnodulation Distortion
7. IOC
8. Signal to Noise
9. Quiesent AC Power
'IO " ~ T
~
I<. VOl NE rt ~ .-
."
Input Signal
Ch aracteristics
. SV + /· 2%: 60Hz·
7KHz signal
s ummed in4:1
ratio
2.5V peak.peak
5Hz sq. wave
I J:.~ I ~ ~,
r.::EL~TI\Ol I , "","IOU"1 ~.-:;:.
INPUTS D4$CQNN«:I( O)
~
,- ,
(l< AHHR
Instructi on s/ COmm e nts
( See Fig. 4.4) When using th e Crown IMA, typical
reading s will be as follow s:
OdB ·. OO4 %
-SdB lhrough -25dB= . 03 %
·30dB·. 03 %
·3SdB·.
03%
I OC s hou ld illuminate once for every rise time and once
for every fal l time (twice every full cycle) , Test
gene rator rise lime mu st be l ess man 1.0 microsecond.
( See Fig . 4.5) SignallO noise s hould be 1 000B below
rated OUtput with meter bandwidth of 20Hz to 20KHz.
IS walts at idle as monitored by wattmeter on AC li ne;
1 20 watlS at fu ll rated outpu t.
I
~
I
~
~
~'.
IIE!\IIM I,NlIICIUN()£() WlW'PE D
AAO.INO QUl'NT CA&(
/'
OM
••
I~ I
...........
h
{ ~ l TH(A
C IWI'<IE L
~ w m
Fig . 4.4 1M Distort io n Test Set - up
Fig. 4 .5 Signal to Noise res l Sel-up
4-4 MaintBnanc9