QEI 675 - Controls and Connections (Rear Panel); Initial Operation; Normal Operation

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2.
RF
OUT
Jack
Jl.
3.
COMP
Jack J2.
Approximately
4Vpp
across
lOK
is
required for
75
KHz
deviation.
4.
SCA
Jacks Js
and
J4.
Approximately
lVpp
across
lOK
is
required for 7.5
KHz
deviation.
5.
METER
Jack J5.
This jack provides access
to
the
PA
voltage
and
current
information
re-
quired
by
the optional meter panel. This panel
is
used
when
the Exciter
is
used
as a
low
power
transmitter.
6.
TBl.
7.
This
is
a
600
ohm
balanced audio input.
+10
dBm+
l
dB
is
required
for
75
KHz
deviation
at
400
Hz.
This input
is
always-pre-emphasized.
The
center terminal
of
TBl
is
connected to chassis ground.
FUSE
Fl
and
XFl.
This
is
the primary
power
fuse
for
the
unit.
It
is
the only fuse nec-
essary since
all
power
supplies are
short
circuit
protected.
It
should
be
replaced only with a fuse
of
the
same
type
and
rating
as the
original
(3AG
lA).
3-3
INITIAL
OPERATION
l.
Operate
POWER
switch
and
verify
that
LED
CR2
is
lit.
2.
Verify
that
AFC
LOCKED
lamp
lights
and
RF
output appears within a
few
seconds.
3.
Check
MULTIMETER
readings
against
factory supplied information.
Read-
ings should agree
within.:!:_
10%.
NOTE:
The
RF
reading will vary
somewhat
depending
on
the
RF
load connected to the
Exciter.
3-4
NORMAL
OPERATION
For
normal
operation,
use
PWR
ADJ
Control
Rl
to
set
power
output to level
required.
Check
MULTIMETER
readings
periodically
to
verify
that
no
drastic
changes
have
taken place.
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