Marconi Instruments 2955 - Page 10

Maximum
input:
Frequency range:
Resolution:
Indication:
Setting:
Acquisition
time:
Accuracy:
Input
Manual
tune:
Auto
tune:
Sensitivity:
Acquisition time:
AF
filters available:
GENERAL
INFORMATION AND
DATA
N
socket:
150
W
(XX
mode
or
one-port duplex) or
100
W (two-port duplex)
for limited period,
topically 2 minutes at 25®C.
End of
usable
working
period indicated by
visual
warning
(REMOVE
RF
INPUT)
and
audible
alarm.
BNC socket;
1.2
W.
Trip
circuit
operates
at
approxi-
mately
1.0
W.
Overload
protection
up to
50
W.
Trippins
indicated by
visual
warning
(REMOVE
RF
INTUT)'' and
audible
alarm.
1.5 to 1000
MHz.
1% of indicated
bar
chan
range.
2 or
3
digits
and
analogue
display.
Automatic
ranging
on
scales 0
to
30,
0
to
100,
0
to
300
mW;
0
to'’l,
0
to
3,
0
to 10.
0 to
30,
0
to
100,
0 to 300
W.
<3
s
with
10 Hz
resolution.
=10% ±1
digit
up
to
500
MHz,
=15% ±1
digit up
to
960
MHz.
±20% ±1
digit up
to
1000
MHz.
±1.25
dB ±f
digit
>5
mW
over
the
ranges
825
to
845
MHz
and 890
to 905
MHz
from
rlS^’C
to 4-25®C.
(There
may be
a
difference
between
a
TX
mode
reading
and a
duplex
mode
reading.
Tne
difference
is
normal
and
within
the
above
limits.)
Modulation
meter
section
Provides
frequency
offset
indication
from
carrier,
-
3
digits and
decimal
point.
Indicates most
significant
positive
or
negative
error.
Provides
measurement
and
simultaneous
display
of
RF
frequency,
RF
power,
modulation
frequency
and
ievel-
N
socket:
BNC
socket;
5
mW (0.5
V),
TX
mode
selected.
20
mW
n
VO,
single
port
duplex.
0.05
mW
(50
mV).
<3
s
with 10 Hz
resolution.
Band-pass
-
300
Hz
to
3.4
kHz.
Low-pass
-
300 Hz
or
15
kHz,
1-10
46881-622N
Apr.
88