OPERATION AND MAINTENANCE MANUAL
FOR SWR AUTOTESTERS AND BRIDGES
1. INTRODUCTION
This manual provides product descriptions and
specifications for WILTRON Series 59, 63, and 97
SWR Autotesters and Series 58, 60, 62, and 87 SWR
Bridges. It also includes procedures for measuring
the directivity of these components.
2. GENERAL DESCRIPTION
The SWR Autotesters and bridges (Figure 1) are
broadband microwave measurement instruments.
They are used with other test instruments for mak-
ing fixed-- and swept--frequency return loss (SWR)
measurements over a wide range of radio frequen-
cies. Return loss measurements are made to check
the performance of systems, subsystems, and micro-
wave components such as amplifiers, directional
couplers, attenuators, filters, splitters, and termina-
tions.
The WILTRON SWR Autotesters and bridges are
precision--balanced Wheatstone bridges. Except for
the two 4--port comparison--type instruments (Mod-
els 59A50 and 58A50) that use an offset termination
in the reference arm, every model has an internal
precision reference termination included in one arm
of its bridge. The major difference between the SWR
Autotester and the SWR bridge is that the SWR Au-
totester contains a built--in RF detector.
3. PERFORMANCE SPECIFICATIONS
Performance specifications for SWR Autotesters are
listed in Table 1; specifications for SWR bridges are
listed in Table 2.
490 JARVIS DRIVE
l
MORGAN HILL, CA 95037-2809
P/N: 10100-00008
REVISION : M
PRINTED: NOVEMBER 1994
COPYRIGHT 1983 WILTRON CO.
Figure 1. Typical WILTRON SWR Autotester and SWR Bridge
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