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RF switching
RF switching uses a solid-state PIN switch to
switch multiple antenna test ports into one test
mixer for downconversion and processing by the
receiver. With this method, up to 64 test ports can
be measured in one rotation of the AUT.
The 85331/32A microwave PIN switches offer SP2T
and SP4T configurations, operate over the frequency
range of 45 MHz to 40 GHz (50 GHz is optional)
and provide 50-ohm termination in the off state.
Refer to the Agilent 85330/31/32A Technical Data
Sheet (publication no. 5091-9009E) for complete
performance specifications.
The benefits of RF switching are:
• High configuration flexibility
• Ability to expand for additional test channels
Steps 34 through 40 are referenced in Figure 23.
34
Indicate if RF switching capability is desired.
35
Indicate if PIN switching is required on the
transmit side of the antenna range, and the num-
ber of switch positions required. If no RF switch-
ing is required, check the 'No RF switching is
required' box and skip
36
Indicate the desired length of the 85384A cable
from the switch control unit to the PIN switch. The
85384A cable is available in lengths of 1, 2, 5, and
10 meters.
37
Indicate the desired length of the 85383A cable
from the 85330A multiple channel controller to the
switch control unit. The 85383A cable is available
in lengths of 2, 5, 10, 20, and 50 meters.
36
and
37
.
38
Indicate the number of switch positions
required on the AUT side of the antenna range. If
no RF switching is required on the AUT side, check
the appropriate box and skip
39
Indicate the length of the 85384A switch con-
trol cable from the switch control unit to the PIN
switch. The 85384A cable is available in lengths of
1, 2, 5 and 10 meters.
40
Indicate the desired length of the 85383A cable
from the 85330A multiple channel controller to the
switch control unit. The 85383A cable is available
in lengths of 2, 5, 10, 20, and 50 meters.
Antenna positioning systems
Far-field positioning systems
For far-field applications, the Agilent 85301B/C
systems are compatible with the Flam & Russell
8502, Orbit AL-4706, Orbit AL-4806-3A and
Scientific-Atlanta 4139 positioner controllers.
These control a wide variety of synchro-based
positioners, allowing the 85301B/C systems to be
integrated with almost any positioning system. If a
new positioning system is required, Agilent recom-
mends Nearfield Systems' positioning products. An
antenna positioner configuration guide is available
for configuring an antenna positioner system to
meet your far-field application requirements.
Contact your Agilent Technologies sales represen-
tative, or Nearfield Systems for assistance with all
of your positioner requirements. NSI can be con-
tacted at:
Nearfield Systems, Inc.
Telephone: (310) 518-4277
FAX: (310) 518-4279
www.nearfield.com
A brief positioner configuration guide is provided
in Figures 24 and 25.
39
40
and
.
27
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