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PATCH PANEL Fl.CILITIES
All of the iwportant internal circuits of the console are ter·-
Dinated and juopered on the Dain terDinal board.
These juopers
Day be rewoved and norDalling jacks wired in place of then.
This
would rernit patching around sections of the console, feeding the
console signal to other equipDent and feeding signals into selected
sections of the console.
Of course, any of the inputs or outputs
11ay nornal through patch panels before connecting to the external
connections.
The prorer use of patch panels wi.ll Duke the differ·-
ence between a very versatile and a rather restricted installation.
On the other hand, if patch panel facilities are not required,
their elinination wi.ll reduce the nULlber of possible operational
errors.
The station engineer Dust weigh all of the factors care·-
fully and act accordingly.
If patch panels are used, they Dust be wired correctly.
They
should be "Tired so that the polarity of the circuits are phased
properly in norcalling and patching operati.ons.
The patch panel
shou1d not introduce grounds in any of the circuits, circuits
that need ground will h2ve thew as explained in the seetion
labeled GROUND CIRCUITS under INSTALI,i.TION.
Circuits of wore than 40 DB difference in level should be sepa-
rated in the patch ranels.
It is recome.ended th2.t the jacks be
segregated into low level, nediun level and high level groups and
all wiring attached to the different groups be cabled separately.
The cables nust have sufficient rh;ysical separation to prevent
crossta1k
as
explained in INST.hLLlcTION.
If
the circuits on the
Iatch panel were locO'"ted in a progresl;live order, as located in the
console or systen, patching would be D'.lch easier.
MUTING RELiiYS
. _ - - -
A
spare relay is rrovided on the relay deck for a fourth nuting
relay, if desired.
This relay Day be wired to Dute with the
oIeration of channels
1, 2
or
3
when the lever key is actuated.
The "hot" side of the relay coil aPIears at terDina1 4B on TB6.
For operation with Sl (channell), connect 4B to lB on TB6.
For
operation with S2, connect 4B to 2B on TB6.
For operati.on with
83,
connect
LJ.B
to 3B on TB6.
With the fourth relay in place, warning
light conneotions
(1 awp
Ilax. load) cm be Dade to terIli.nals 9
find 10 on TB7.
Monitor speaker connections nay be Ilade on TB6:
"Left
II
spkr. - Terninals 14
A -
14B;
"Right
II
spkr. .- Teroina1s
.l5A ...
15B.
The sr·eakers will Dute, and the warning lights will
operate sillultaneously with the other relay already connectod to
the cho.nnel key selected.
The fourth relay (as well as the other
three relays) cay also be wired to operate with external switch-
ing, if desired.
11/20/64
·-21-
The Executive
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