Marconi Instruments 2040 - Spectral Purity

VSWR
For
output levels less than 0 dBm:
Less than 1.25:1
to 2.2
GHz
(return loss greater than 19.1 dB);
Less than
1.4:1 to 2.7 GHz. (return loss greater than 15.6 dB);
Less than 1.5:1 to 5.4 GHz (return loss greater than
14 dB).
Output protection
An electronic trip protects the generator output against reverse
power of up to 50
W
from
a source
VSWR of
up to 5:1.
Output connector
50 Q normal, N-type female socket.
SPECTRAL
PURITY
At RF levels
up to
+7
dBm
Hannonics
2040,
2041:
Better than
-30
dBc for
carrier frequencies to 1 GHz;
Better than
-27
dBc for carrier frequencies to 2.7 GHz.
Better than
-27
dBc for carrier frequencies
to 1.35 GHz;
(2040
with
Option
003).
2042:
Better than
-25
dBc for
carrier frequencies to 5.4 GHz.
Sub-harmonics Better
than
-90
dBc to 1 .35 GHz,
Better than
-40
dBc to 2.3 GHz,
Better than
-30
dBc
to
5.4 GHz.
Non-harmonics
(offsets
greater
than
3 kHz)
In low noise
mode 1: Better than
-70
dBc up to 21 .09375 MHz;
better
than
-90
dBc
from 21 .09375 MHz
!
to 2.7 GHz;
and
better than
-84
dBc from 2.7
to
5.4
GHz.
In normal mode: Better than
-70
dBc
to
5.4
GHz.
Residual FM (FM off) Low
noise mode: Less than 0.3 Hz RMS deviation in
a 300 Hz
to
3.4 kHz unweighted bandwidth
at 1 GHz.
Normal
mode: Less than 7 Hz RMS deviation in a
300
Hz
to
3.4
kHz
unweighted
bandwidth
at
470 MHz.
SSB phase noise
Low noise mode 1: Less than
-115
dBc/Hz
at an offset of 1 kHz
from a earner
frequency of 1 GHz;
Less than
-140
dBc/Hz at an offset
of
20 kHz
from a carrier
frequency of 1
GHz.
Normal
mode: Less than
-116
dBc/Hz (typically
-122
dBc/Hz) at
an offset of 20 kHz from
a carrier frequency of
470
MHz.
RF leakage
Less than
0.5
jiV PD generated
at the carrier frequency across a
50 H load
by a
two
turn 25 mm loop, 25 mm or more from the
case of the generator with the output terminated
in a 50 Q. sealed
load.
FM on
AM Typically less than 100 Hz for
30% AM depth at a modulation
frequency of
1 kHz and a carrier frequency of 500 MHz.
OM
on AM Typically less than
0.1 radians at a carrier frequency of 500 MHz
for
30% AM depth for modulation rates up to 10 kHz.
46882-074C 1-7