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SIGNAL REFERENCE
EXCITER INTERLOCK
ACCESSORY
AMPLIFIER OUTPUT
This is a two-position switch so that the
signal can be referenced to the amplifier
"Chassis", or to an "External" reference point
to eliminate earth loops.
The Exciter protection is disconnected by this
two-position switch so that the 2707 can be
used with non-8 & K shakers or under re-
duced field conditions. The exciter is fully
protected when the switch is at "In".
Plug: WK-6-32C
A 6 pin Cannon socket type WK-6-32S
allowing an external pair of contacts to be
connected into the Exciter protection circuit-
ry, and also to provide protection during
Multiple Exciter operation. For connection
see sections 3.5 and 3.9.
Plug: WK-C3-32C
A 3 pin Cannon socket type WK-C3-32S to
connect power to the Exciter Head moving
coil. The Head/Body interlock is also carried
through
this socket.
For connection see
Fig.3.4
.
Power
Output
Sta.
g e
.....
' " "
"]
- I
i
~ 1 ~o-o~-o-----+----"'o--
---
M~::~'
Reference
--~
PHASE
27/PI.!
Fig.2.3. Phase Switch
A double-throw double-pole switch that rever-
ses the phase of the drive to the Exciter head
(Fig.2.3). In the 0° position the output is in
phase with the input signal.
11
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