User`s guide

15
34980A RF and microwave
switch modules
The34980AoffersavarietyofRFand
microwaveswitchmodules—RFmultiplex-
ers, SPDT switching from DC to 26.5 GHz,
or a switch/ attenuator driver module that
allows you to control switches or attenua-
tors external to the 34980A mainframe.
34941A/42A—from DC to 3 GHz
TheRFswitchmodulescanbeusedto
switch signals from DC to 3 GHz and above.
This can be useful for switching signals
between oscilloscopes, spectrum analyzers,
networkanalyzers,andotherRFtest
equipment.
Choose from the following features:
• 50-or75-ohmQuad4-channel
multiplexers
• DCto3GHz
• 30V,0.5A,10W
The 34941A and 34942A are configured
asfourindependent1x4RFmultiplexers
on a single module. Multiple banks can
be connected together to create a larger
multiplexer. To prevent ground loops, indi-
vidual multiplexers are isolated from each
other and from the mainframe’s chassis.
However, the multiplexer channels can be
chassis grounded with a simple change.
Both50-ohmand75-ohmversionsare
available.
Figure 10. 34941A Quad 1x4 50 ohm 3 GHz multiplexer
101 102 103 104
301
3494xA
302 303 304
201 202 203 204
401 402 403
COM
COM
COM
COM 404
Quad 1x4
RF VUX
xx ohm
34941A typical initial crosstalk
Frequency
10 MHz
0 dB
-10 dB
-20 dB
-30 dB
-40 dB
-50 dB
-60 dB
-70 dB
-80 dB
-90 dB
-100 dB
40 MHz 100 MHz 400 MHz 1 GHz
4 GHz
Channel to channel
Bank to bank
34941A typical initial insertion loss
Frequency
10 MHz
0.0 dB
0.3 dB
0.6 dB
0.9 dB
1.2 dB
1.5 dB
1.8 dB
2.1 dB
2.4 dB
2.7 dB
3.0 dB
40 MHz 100 MHz 400 MHz 1 GHz 4 GHz
34941A typical initial VSWR
Frequency
10 MHz
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
40 MHz 100 MHz 400 MHz 1 GHz 4 GHz