Atec Rohde-Schwarz-SMF100A - Manual (Page 4)

4 ¸SMF100A Microwave Signal Generator
Modulation matrix
Additional options
The ¸SMF100A can be expanded
with the following options in order to
further adapt it to a wide variety of
applications:
Expanded level range
For sensitivity measurements on receivers,
very low levels are needed. With the op-
tional ¸SMF-B26 or ¸SMF-B27
step attenuator, the lower level limit is
shifted from –20 dBm without attenuator
down to –130 dBm with attenuator.
High output level
In many microwave test setups, various
equipment such as long cables, power
splitters, directional couplers, or RF
relays cause high loss. One possible
solution here is an expensive exter-
nal microwave amplifier. But you can
avoid this budget-consuming compo-
nent by using the ¸SMF-B32 or
¸SMF-B34 high output power option
with up to typ. +25 dBm at 20 GHz.
AM, FM, jM, and Log AM including
LF generators and noise generator
The ¸SMF-B20 AM/FM/
jM/LOG AM
option complements the ¸SMF100A
microwave signal generator. This expan-
sion also includes two LF generators and
a noise generator, making any combina-
tion of modulation modes possible. The
table above provides an overview.
Analog ramp sweep mode
The analog ramp sweep mode (provided
by the ¸SMF-K4 option) corresponds
to the analog sweep of classic sweep
generators except that the sweep is fully
synchronized over the complete range.
In this way, the excellent frequency ac-
curacy of digital step sweeps is achieved
on the whole, and this at much higher
sweep rates of min. 700 MHz/ms at fre-
quencies
≥3 GHz.
High-end pulse modulation
The ¸SMF100A can additionally be
equipped with the ¸SMF-K3 pulse
modulation option. Even high require-
ments are exceeded by an ON/OFF ratio
of >80 dB, a rise/fall time of <10 ns, and
a minimum pulse width of <20 ns.
High-quality pulse generator
In the case of pulsed signals, the
combination of the ¸SMF-K3 pulse
modulator option and the internal
¸SMF-K23 pulse generator option
offers the ideal solution – particularly
FM jM AM Log AM PM FSK PSK ASK
FM  –    – – 
jM –     – – 
AM    – •   –
Log AM   –  •   –
PM   • • –   •
FSK – –    – – 
PSK – –    – – 
ASK   – – •   –

•
– possible with no restrictions
possible with restrictions
not feasible
Maximum output power with and without the R&S®SMF-B34 high output power option in the
frequency range 100 kHz to 43.5 GHz (¸SMF-B144 and ¸SMF-B2; with the R&S®SMF-B27
step attenuator option); the lower curve in the frequency range 100 kHz to 1 GHz is with activated
pulse modulator of the R&S®SMF-B2 frequency extension
Maximum output power with and without the R&S®SMF-B32 high output power option in the
frequency range 1 GHz to 22 GHz (¸SMF-B122; in both cases with the R&S®SMF-B26 step
attenuator option)
0
5
10
15
20
25
30
35
0 5 10 15 20 25 30 35 40
Level in dBm
Frequency in GHz
With ¸SMF-B34 high output power option
Without ¸SMF-B34 high output power option
Output power of the ¸SMF-B2 frequency extension
0
5
10
15
20
25
30
35
0 5 10 15 20
Level in dBm
Frequency in GHz
With ¸SMF-B32 high output power option
Without ¸SMF-B32 high output power option
SMF_bro_en_5213-7660-12_v0201.indd 4 13.02.2009 15:43:52