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Chapter 5 73
Options and Accessories
Accessories
Options and Accessories
HP/Agilent 11974 Series Preselected Millimeter
Mixers
11974 Series preselected millimeter mixers are available to extend the
frequency range of analyzers with Option AYZ (external mixing) up to
75 GHz. Preselection reduces mixer overload from broadband signals,
reduces radiation of local oscillator harmonics back to the device under
test, and reduces the level of image and multiple responses displayed.
The following four models are available:
RF and Transient Limiters
The Agilent 11867A and N9355B RF Limiters protect the analyzer
input circuits from damage due to high power levels. The 11867A
operates over a frequency range of dc to 1800 MHz and begins reflecting
signal levels over 1 mW up to 10 W average power and 100 watts peak
power. The N9355B microwave limiter (0.1 to 18 GHz) guards against
input signals over 1 milliwatt up to 1 watt average power and 10 watts
peak power.
The Agilent 11947A Transient Limiter protects the analyzer input
circuits from damage due to signal transients. It specifically is needed
for use with a line impedance stabilization network (LISN). It operates
over a frequency range of 9 kHz to 200 MHz, with 10 dB of insertion
loss.
Power Splitters
The Agilent 11667A/B/C power splitters are two-resister type splitters
that provide excellent output SWR, at 50 Ω impedance. The tracking
between the two output arms, over a broad frequency range, allows
wideband measurements to be made with a minimum of uncertainty.
11667A: DC to 18 GHz
11667B: DC to 26.5 GHz
11667C: DC to 50 GHz
Table 5-2
HP/Agilent
Model Number
Frequency Range
11974A 26.5 to 40.0 GHz
11974Q 33.0 to 50.0 GHz
11974U 40.0 to 60.0 GHz
11974V 50.0 to 75.0 GHz