Marconi Instruments 2955 - Page 5

GENERAL
INFORMATION
AND
DATA
Two-pon
duplex;
One-port
duplex:
Resolution:
Indication:
Setting;
Accuracy:
Spectral
purity
FM
on
CW:
Harmonics:
Sub-harmonics:
Spurious
signals:
S/N at
20
kHz
offset:
RF
leakage:
Protection:
-120
dBm to
-40
dBm
10.224
|xV
to
2,24 mV
PD),
-140
dBm
to -SO dBm
(0.0224
to
22.4
PD).
0.1 dB.
4
digits (dBm/piV and
PD/EMF).
10 dB
and 0.1 dB steps.
>2
dB for
levels
above
-127
dBm.
<30
fiz up to 520
MHz,
<60 Hz
up
to 1000
MHz.
(300
fiz to
3.4 kHz
weighted RMS).
Typically:;^
8
Hz up to 250 MHz.
15 Hz
up to 500
^4Hz.
30 Hz up to 1000
MHz.
Harmonics are
in band
0.4 to
1000
MHz only.
<-20
dBc
up
to
1.5
MHz.
<-25
dBc
1.5 MHz to
250
MHz.
<-20
dBc
250
MHz to
1000
MHz.
None
up to 530 MHz,
<-25
dBc up
to 1000 MHz.
Carrier
up to 88
MHz;-
<-45
dBc
below 110 MHz.
<-35
dBc
above 110 MHz.
Carrier
up
to
1000 MHz:-
<60
dBc.
<-106
dB/Hz
(typical)
to
500
MHz.
<-100
dB/Hz (typical)
to
1000
MHz.
<0.5
piV
PD generated
In a
50
D
load
by
a
2-turn
25 mm loop as
near
as 25
mm
to
the case
of
the
instrument
with
the output
set
to
less
than
-20
dBm
and the output
terminated
in
u 50
D
sealed
load.
N
socket:
Reverse power
overload
indicated
by
visual warning
(.RBMOv'E RF
CnPUT)
and
audible
alarm.
BNC
socket:
Trip circuit
operates
at
approximately
1,0
W.
Reverse power
protection
up
to
50
W.
Automatically
resets
on
removal
of
power
input.
^
Tripping
indicated
by
visual
warning
(RicMOVB
Rr
INPLT)
and
audible
alarm.
46881
-622N
Apr. 88
1-5