Marconi Instruments 2955 - Page 11

GENERAL
INFORMATION
AND DATA:
Amplitude
modulation
CW
range:
1.5
:o 400
MHz.
Modulation
depth
range:
,0
to
90% below
lOO MHz.
0 to S0%
from iOO
to 400
MHz.
Usable to
100%
when
manually
tuned.
Automatic
ranging
(bar chan),
0
to
10,
0
to
30,
0 to
100%
depth.
Modulation
frequency
range:
50 Hz
to
10
kHz
(usable from
10
Hz
to 15
kHz),
Resolution:
1%
AM.
Indication:
2
digits
and
±.
peak analogue
display.
Accuracy:
±
6
%
±1
digit at 1
kHz.
4;8.5%
±1
digit from
50 F£z
to 10
kHz.
Demodulation
distonion:
At
30%
AM and 1
kHz modulation
frequency,
300
Kz to 3.4
kHz bandwidth:-
<2%
at
21
MHz carrier
and above.
<5%
up
to
21 MHz carrier.
Residual
AM:
<1%,
300
Hz to 3.4
kHz
bandwidth.
Frequency
modulation
CW
range:
1.5 to
1000 MHz.
.
,
Deviation
range:
0
to 25
kHz
(30
kHz
on
scope).
Automatic
ranging
(bar
chart).
0 to
1.
0 to
3. 0
to
10,
0
to
30 kHz.
Modulation
frequency
range:
50
Hz to
10 kHz
(typically 10
Kz to
15
kHz).
Resolution:
10
Hz up to
2.5
kHz deviation.
1%
up
to 25
kHz
deviation.
Indication:
3
digits
and
±
peak analogue display.
Accuracy:
±\
digit
at I kHz,
±
3
.
5
%
±1
digit
over
range 50 Hz to 10
kHz.
Demodulation
distortion:
<2%
distortion at
5 kHz
deviation
and 1
kHz
modulation frequency in
a
300 Hz
to
3.4
kHz
bandwidth.
Residual
FM:
For inputs
above
20
mW/0.2 mW
(N/BNC)
in a
300
Hz to
3.4 kHz bandwidth:-
<30
Hz RMS
(typically
15
Hz) up
to 500 MHz.
<60
Hz
RMS
(typically
30
Hz) up
to 1.000 MHz.
46881-S22N
Apr.
88
1-1
1