Chapter 5 71
Options and Accessories
Accessories
HP/Agilent 11974 Series Preselected Millimeter Mixers
The 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 milliwatt up to
10 watts 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 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
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