Marconi Instruments 2955 - Page 32

OPERATION
(11)
To use the
optional
20 dB
attenuator, connect the
unit to
the
GEN
OUT-
PUT socket
(i^.
Press the
HELP key
(i4)
and
then
continue
by
following
‘HELP
Key
Operation'.
When
the
accessory
is
selected, a
reverse
field A
is
displayed
and
the displayed
AF
generator level
is
decreased
by
a
factor of
10
(20
dB).
Two
tone operation
To
generate two rones, continue
as
follows:-
(12)
Press
TOh^S
0
to
display the
TONES
STANDARD
MENU. Press the
MODE key
@
which
is
arrowed
by
TWO
TONES
to display
the TWO,
TONES
menu.
(13)
Press SEND TONE and then return to
TRANSMITTER
TEST. 2T
is shown
in
reverse %'ideo
on
the
display and a 1 kHz tone in
addition
to
the variable
fre-
quency output
is
connected
to
the
AF
GEN
OUTPUT
socket
(0
.
The level is that
set
previously
for
the
variable frequency.
(14)
To
return
to
single tone operation,
press
TONES
0
and
then
the key
which
is
arrowed
bv
TWO
TONES.
Press the key
which is
arrowed
by
STOP
TONE and
then
return
to' TRANSMITTER
TEST.
3-8
46881-622N
Apr.
88