Ashly SC33 - Manual (Page 2)

The SC-33's opeiation can be bfokon down into Vo
ftjnctioncii building biociii o voltage conttolJed
omphrief [VCA) which performs the actual task of
muting <3i fjdssing the audio sigr«l. q detsttof
Cffcuit which is resporTsitile for pfowdrng thg control
voltage that determlr^s the goln of the vCA
Use at a VCA os a gain control elament pnovidsi
severol advantages in a noise gdte. Including supe-
rlof audio fidelliv. dccurote trockinc of two cx morTe
units tJetJ for si'&'eo operatiori. arvd crtfock/releaiB
speeds much faster' them those possible with optic­
ally coupled devices The Ash ly VCA used intheSC-
3i3 is □ Cfass-A device sMhibiting aKtremely low
eijstcvfioh. low hrsise. low conitiof voifoge feedthrough
(turh-or^ ctick). ond excellent thermol stability
♦ «
The defector dreuM ericompassas all oT the frortt-
panel controls anrd generates a oartrol voltoge
which gives the SC-33 its fum-an and fum-taff char­
acteristics Through the use of unusually wide-rdryge
time constant options and □ unique dual rereoss-
Hme circuit, o gnaof variety of gotirvg effects con be
achieved- A very fast (10 microBecond)attack time
insures that the leading edge of fdst transient
material such as snofe drums will rvever be lost, idhd
the fcxle control offeví smoofh, lineor fade timas of
up to 30 seconds. The hold coritrol oNers a ''wait
before fading" option to preverst premature inifiotion
of the tods cycle, usaful when processing moterlüt
that contains notufai peruses, such os srpeeoh ond
Insidj menial solos. The threshold range is greater
I han úD d0, making the SC-33 useful for both
professional and semi-pro signal levefs. Other
thoughtful features include detector symmshy to
within ti dB. a hysteresis circuit lo absolutely prevent
chattering near thneshirfd high sfew-rote dfcultry
ihnoughout. ocTive bolonced irpsufs. and a li
gauge ^teal chaeals
K a
Cl?™«
------ “ Q '
MIECK»
•:rrMWiKA-i
-----O IhMlHÚ&Ú
WraUiUCy RESPONSE
THO. 20-20 MHI, 410 diV
Inputs
IIVI DlsIOrliCin. 2T>2[KHt.
-40 dBV input
Croiftalk from Key input
@ lkH3
hblj№. TOH^SOkMl
dAlH
ciefEaofi svMMETihf
Colikol Voltoge
feefunrougri
MAX iNPUT/OtJTnJT LEVEL
Slew Ftate
ThresTicld №nge
S№ to lOOkHi. -a,
02X
. 02 %
d&
-áa dhV
Unity
' C.25 da
úa dBiV lyplcoi
+20t«V
> tOV per microssOOnd
-40 dbV 10 r20 dBfy
SPECiFfCAllONS
3 effl Aitock Time <p«f 40 dB
gain incredte}
iCt mlcrosKonds to
SO woonds
HcrTd Time 4(9 mlHIsacorKli iQ 12 secQTiidi
Fad« Time (per 40 dO gain
decrease?
Nolw Altenuolldn (Floor?
Input Impedcince
Ouipul Impedance
AiOOiriOMAt FEATURES
1S milliseconds to
30 seconds
0 de lo (i&
40k u Bolorkood Bridgirtg
(Activo?
400 (4 , lermlmle wHh SCO U
or greolei
Key Input, jwUcn
selectable
Nou* l^le Bypass switch
stereo intercornect via
root ponel tadu
led Threiftold Indlcofot