Marconi Instruments 2955 - Page 39

OPERATION
RECEIVER
TESTING
RF
GENERATOR
3-7
RF
generaior
conirols
and connectors
(T)
RX
key.
Connects
the
RF
generator
to
the
RF
IN/OUT
BNC
and
N
sockets
(is)
and
Writes
on the
screen
information
concerning
the
instrument
settings.
(?)
MODE
keys.
Used
as
soft
keys to
select
programmed functions when
menus
are
shown
alongside
on the
screen.
(T) RF
GEN
key.
Enables
the
internal
signal
generator.
(T)
RX=TX
FREQ
key.
Used only when
in TX
mode
with
the
transmitter keyed
up.
Tunes
the
signal
generator
to
the
frequency
of a
transmitter connected to
(ij)
or(j^.
Tne
receiver
section
of
a
transceiver
can
be
tested
without
having
to
enter
the frequency.
SET
MOD
key.
Enables
the
internal signal
generator miOdulation
system.
Followed
by a FREQ
0
or
LEVEL
Q
entry to set the
modulation value.
0
FREQ
key.
Precedes
a
keypad
0)
entry
so that the entered data
is
recognized as a
frequency.
(0
LEVEL
key.
Precedes
a
keypad
0)
entry
so that
the
entered
data
is recognized
as
a
level.
.As
supplied,
each
2955 is programmed
either
for European
or
for North
Ameri-
can
standards.
European
practice
is
to
show’
the
output level
as
PD
or
EMF,
468ai-622N
Apr,
S3
3-15