Atec Rohde-Schwarz-SML03 - Manual (Page 3)

Signal Generator ¸SML 3
Applications ...
Lab and R&D: versatile
High spectral purity
Owing to its low phase noise, the
¸SML is ideally suited to replace LOs.
Versatile modulation modes
The ¸SML in conjunction with the
optional Pulse Modulator ¸SML-B3
handles all analog types of modulation.
AM, FM/
ϕM and pulse modulation can
be used simultaneously. TDMA signals or
amplitude variations in the case of FM,
for example, can thus be simulated.
High and precise output level
The ¸SML has plenty of power in
reserve so level loss produced by the test
setup can be easily compensated. Its high
output level makes the ¸SML an
ideal source for driving high-level mixers.
Excellent modulation characteristics
The DC-coupled FM allows the ¸SML
to be used as an accurate VCO.
Example: receiver measurements
◆
Sensitivity measurements require a
signal generator with high level accu-
racy. This is particularly true at low
output levels. With its sophisticated
calibration technique, the ¸SML
features high level accuracy (<0.5 dB
at levels >
−120 dBm).
◆
Squelch measurements call for con-
tinuous level setting. Non-interrupt-
ing level variation by typ. 30 dB
makes the ¸SML the ideal choice
for squelch measurements.
◆
Low spurious, low broadband noise
and above all excellent SSB phase
noise are prerequisites for using a
signal generator as an interference
source. With typ.
−128 dBc (1 Hz)
SSB phase noise (at f = 1 GHz,
∆f = 20 kHz), spurious suppression of
typ.
−76 dBc and broadband noise of
typ.
−150 dBc (1 Hz), the ¸SML
easily meets even the most exacting
requirements.
The ¸SML offers all features
required of a state-of-the-art
general-purpose signal generator:
wide frequency range, large vari-
ety of modulation functions and
high reliability – at an extremely
attractive price. The fields of appli-
cation of the ¸SML are virtu-
ally unlimited in development,
servicing or production where it is
used as a flexible signal source in
automatic test systems. The
¸SML benefits both from our
long-standing experience in the
field of signal generators and the
latest technology. Its uses are as
versatile as its functionalities.
Settling upon frequency change from 100 MHz to 1 GHz. Level sweep within 25 dB range.
1 2 3 4 5 6 7 8 9 10
Time in ms
+100 Hz
–100 Hz
Fr
equency
de
viation
in
Hz
rise time
1 GHz
◆
The mechanical design of the
¸SML ensures excellent RF
shielding of its casing. This is particu-
larly important for measurements on
highly sensitive receivers with built-in
antenna such as pagers.