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Wiltron 560-9 Series Operation And Maintenance Manual

Swr autotesters

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SERIES 560-9XXXX AND 5400-6XXXX SWR AUTOTESTERS
OPERATION AND MAINTENANCE MANUAL
1.
INTRODUCTION
This manual provides product descriptions and
specifications for WILTRON Series 560-9XXXX and
5400-6XXXX SWR Autotesters (Figure 1). It also
includes Performance Verification procedures for
these components.
2.
GENERAL DESCRIPTION
WILTRON SWR Autotesters are precision-balanced
Wheatstone bridges that contain an internal preci-
sion reference termination in one arm of the bridge.
Series 5400-6XXXX models have N or BNC type test
port connectors. Models 560-97XXX have N or
GPC-7 type test port connectors, and models
560-98XXX have WSMA or K type test port connec-
tors (see Table 1 on page 2).
These units are broadband microwave measurement
components that are used with the Model 562 Scalar
Network Analyzer and with Series 54XXX Scalar
Measurement Systems for making fixed-frequency
and swept-frequency return loss (SWR) measure-
ments. Return loss measurements are used over a
wide range of radio and microwave frequencies to
check the performance of systems, subsystems, and
microwave components such as amplifiers, direc-
tional couplers, attenuators, filters, splitters, and
terminations.
Figure 1. Typical Series 560-9XXXX
490 JARVIS DRIVE
MORGAN HILL, CA 95037-2809
3.
PERFORMANCE SPECIFICATIONS
Performance specifications for the SWR Autotesters
are listed in Table 1 (page 2).
4.
EXPLANATION OF SWR
AUTOTESTER SPECIFICATIONS
Certain key specification terms are explained below.
a. Accuracy.
This three-element term defines
the accuracy with which an SWR Autotester can
make a reflected signal measurement. The three
elements (0.01 ±0.06 ρ
1st Element: (0.01) is the directivity of the SWR
Autotester expressed as a reflection coefficient
(40 dB for this example, refer to Table 3 on
page 9).
2nd and 3rd Elements: ±0.06ρ
tion in accuracy due to test port mismatch (im-
pedance discontinuity). Element 2 (0.06) is the
inherent test port mismatch expressed as a re-
flection coefficient. The 3rd element, rho (ρ), is
the reflection coefficient of the device under test
(DUT). The entire expression describes the
measurement uncertainty caused by the re-
flected signal being re-reflected by the test port
mismatch.
b. Directivity. A figure of merit expressed in dB.
This figure represents the ratio of the power
levels as seen at the output port when (1) the
test port signal is fully reflected, and (2) the test
port is perfectly terminated.
c. Frequency Sensitivity.
tion in output power/voltage that can be ex-
pected due to a change in frequency over the
specified range when the input power is held
constant
d. Output Time Constant. The amount of time
required for the selected output pulse to either
rise from the 10% to the 90% point or fall from
the 90% to the 10% point on the waveform.
2
) are described below.
2
is the deprecia-
The maximum varia-
P/N: 10100-00028
REVISION : B
PRINTED: NOVEMBER 1994
COPYRIGHT 1992 WILTRON CO.

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Summary of Contents for Wiltron 560-9 Series

  • Page 1 INTRODUCTION PERFORMANCE SPECIFICATIONS This manual provides product descriptions and Performance specifications for the SWR Autotesters specifications for WILTRON Series 560-9XXXX and are listed in Table 1 (page 2). 5400-6XXXX SWR Autotesters (Figure 1). It also includes Performance Verification procedures for EXPLANATION OF SWR these components.
  • Page 2 Table 1. SWR Autotester Performance Specifications Freq Direc- Sensi- Test Port Models tivity Accuracy Physical tivity Conn. (dB) (dB) 560-97XXXX Series SWR Autotesters, 10 MHz to 18GHz 560- 0.01–8 GHz 8–18 GHz 0.016 ±0.06ρ 0.016 ±0.10ρ ±1.2 -97A50 GPC–7 0.010 ±0.06ρ 0.010 ±0.10ρ...
  • Page 3 When an RF component connector is mated WILTRON Pin Depth Gauge (Figure 3), or with a connector having a destructive pin depth, equivalent, can be used for this purpose.
  • Page 4: Performance Verification

    WSMA Open/Short and the RF Output con- frequencies above 2 GHz, a magnified reflection tech- nectors of the 54XXX and other WILTRON RF nique (air line) measurement is used. Below 2 GHz, signal sources. A vial containing five of these...
  • Page 5 quired; refer to paragraph 5f. Figure 10 (page 11) (b) Select the Analog softkey from the dis- describes the procedure for installing these washers. played menu. (c) Select the Edit F1 softkey from the dis- The directivity measurement procedures described played menu.
  • Page 6 Table 3. Recommended Test Equipment Recommended Model Instrument Required Characteristics and Manufacturer Scalar Network Analyzer System* Includes: WILTRON 562 SNA and Scalar Network Analyzer WILTRON Series 68XXXA/B Vertical Sensitivity: 0.5 dB/Div. Synthesizer Variable Offset Control Sweep Generator or Synthesizer WILTRON 54XXX Scalar Leveled Output: ±1.0 dB...
  • Page 7 GOOD Figure 7. Examples of Good and Bad Air Line Connections. c. Directivity Measurement — 2 GHz and 10. Connect 20 dB Offset Termination to air line above and press SELECT key. 11. Press CHANNEL 1 MENU key. 1. On the network analyzer, Press CHANNEL 2 key to OFF.
  • Page 8 3 dB or higher than the directivity of the SWR Autotester being meas- less. For ripples greater than 3 dB, ured. The WILTRON terminations recommended in Table 3 meet this requirement. refer to Table 4. SWR OMM...
  • Page 9: Maintenance

    • If available, use compressed air to remove for- than cleaning be attempted by the customer. The eign particles and to dry the connector. SWR Autotester should be returned to WILTRON for • After cleaning, verify that the center pin has repair and/or service when needed.
  • Page 10 Table 4. Microwave Measurement Conversion tables for Return Loss, Reflection Coefficient, and SWR with tabular values for interaction of a small phasor X with a large phasor (unity reference) expressed in dB related to reference. Relative to Unity Reference ± Return Reflection REF + X...
  • Page 11 Step1. Separate a single WSMA connector compensation washer and trim away the interconnecting tabs. Step 2. Connect the 560-98SF50 SWR Autotester input port to the signal source RF output port, and loosely tighten connector. Orient the WSMA female connector (test port) Step 3.
  • Page 12 Step 5. Loosen the SWR Autotester input port connector and rotate unit hori- zontally, as shown at the right. Align the unbeaded end of Air Line with test port connector and care- fully mate connectors. Tighten all connectors carefully. NOTE For a 560-98S50 SWR Autotester (male WSMA test port) in combination with a 19SF50 Air Line, insert the compensation washer into the...
  • Page 13: Limitation Of Warranty

    WARRANTY The WILTRON product(s) listed on the title page is (are) warranted against defects in materials and workmanship for one year from the date of shipment. WILTRON’s obligation covers repairing or replacing products which prove to be defective during the warranty period. Buyers shall prepay transportation charges for equipment returned to WILTRON for warranty repairs.