Table of Contents
Advertisement
SIl1ULTiiHEOUS FEED TO LUrE Al"lP 2
§o 3
The line aDplif ier input Svli tches allow swi.tching the output of
line allp 1 into line =p 2 and
3.
.Pads iiT12, AT13, and AT14 ad··-
just the signal level to a level cODparable to those appearing
at the other posi.tions of tLe line input switches.
The absolute
output level of line aDP 2 will depend upon the relative gain
control settings of both line aLrps 1 and 2.
For exanple, pads
ATl2 and liT13 have a total loss of 65 DB.
If both line aups are
set to have a gain of 65 DB, a·-55 DBJVi si gnal app1ied to the i.n·-
put of ALI will appear at the output at a tlO DBM level.
After
passing through the pads it will appear at the input of AL2 at a
-55 DB level.
AL2 has the SaDe gain as ALI so it will appear at
output of j,L2 8t +10 DBl'l also.
However, if the aLlplifi.ers are
set for different aDounts of gain, the signal wiI1 not be the SaDe
at both outputs.
A signal aIJP1ified 70 DB for exaDple, will be
padded down only 65 DB and aga.i.n acplif
i
eel 70 DB, so the output of
AL2 wi.ll be 10 DB hi.gher than the output of ALI.
:Fads ilT12 and
ATl? are adjusted to gi.ve EJqual levels at the outputs of all line
ar:ps, when input switches are in "sinul." rositi.on, with norDal
operating levels.
Pads AT13 and ATl4 can be ad;justed, if neces-
sary, to better suit the local requireIJents.
MIXING SYSTB1
- - - - - - - - - - -
Thp.
TJj
xinG s:ysteG consi sts of a t8!1 cha.nnel nixeJ:', utili.zing
ladder type controls connected in a parallel, LliniLnlr. loss type
Iii.xing ci.rcui t .
VU
~1ETER .iJif~
ISOL"TI.QJ:I. .. F
i~12§
The two VU I2eters are set up to read "zero" when si.gnal level
0
f
+8
VU is bei.ng fed into the prograrl li.ne.
Isolati on pads a1'e
placed in each output line to isolate the console circuits frOD
the various telephone line renctances.
Speaker Duti.ng relays are Dounted on '" shock nounted deck to
reduce DGchani.cc1 noise.
TllG relays have two sets "D" contacts, onG "A" contact and one "B"
contact that are connected to Ilute the studio spe8kers and connect
a 47 ohn load resistor in place of the sreakers.
The relays also
energi ze the p:T:'oper warni.ug LiGht in the studio, and IJute the
intercoll speaker to prevent intercon use in a studio with ....
B. ..
Jiv"
Di.crophone.
1l/20/64
-18-
The Ex:ecutive
Advertisement
Table of Contents
