TRU 1-5/8 EIA Mating Durability Test Report

1
245 Lynnfield Street
Peabody, MA 01960-5099, USA
Tel. 978.532.0775
Fax 978.531.6993
www.trucorporation.com
1-5/8 EIA
Mating Durability Test Report
Objective
Test & characterize the mating durability of a TRU manufactured 1-5/8 EIA interface using phosphor bronze contact over
an extended number of mating cycles to simulate a lifetime of performance. The test will measure and monitor the
following parameters: VSWR, insertion loss, flare diameter of contact, to determine their impact on electrical/ mechanical
performance.
Test Sample
A cable assembly described below was subjected to the test.
1-5/8 Cable Assembly: 41.50” length, LMR-1200 FR cable, Fig.1
Connector 1: 1-5/8 EIA (m) Plug, (TRU-9751-SNX)
Connector 2: 1-5/8 EIA (m) Plug, (TRU-9751-SNX)
Test & Inspection Conditions:
All individual tests and inspections performed under the following conditions unless otherwise specified in the detail
procedure(s):
Environment:
Temperature:
Relative Humidity:
Barometric Pressure:
Room Ambient, 59 to 86 deg F (15 to 30 deg C)
20% to 80%
Sea Level (650 to 800mm Hg)
Configuration:
Tests and inspections will be performed on a clean flat surface (bench or equivalent) in a clean well-lighted area,
free of debris and foreign objects, unless otherwise specified.
Test & Inspection Equipment:
The following test equipment / tools / fixtures or equivalent were used to perform the test & inspections.
Electrical:
Vector Network Analyzer (HP 8753E) used on all electrical measurements
Applicable test port cables / adapters for each assembly, set up as applicable per figure 1.
7-16 Calibration Kit (p/n: Maury Microwave 2750B)
Full 2 Port Calibration:
401 data points
30 Hz BW
S11 measurement = End 1 of cable assembly
S22 measurement = End 2 of cable assembly
2
Electrical Test Set-Up
Network Analyzer
S22
S11
Device Under Test
Figure 1
Mechanical:
Mitutoya 5210-540-2973 micrometer: used to measure contact diameter.
Test Procedure:
• Baseline electrical / mechanical measurements were performed on the sample assembly:
o VSWR, Insertion Loss (Frequency range: 10 MHz to 1000 MHz)
o Contact diameter, Visual Examination of Product
• Subject sample to 500 mating cycles or until a failure occurs.
o A failure would consist of: assembly loses contact, or contact flare diameter does not meet spec
(∅.598±.002).
o Note: a cycle consists of 1 complete electro-mechanical mating onto its corresponding mating adapter or
mating contact and 1 complete un-mating from its corresponding adapter or mating contact.
• After every 10 cycles (up to 100), then every 25 (up to 200), then every 50 (up to 500) all-electrical / mechanical
test & inspections performed at baseline were repeated on each sample. See figures 2-3 for mating configurations.
• A separate test to simulate extended mating to be performed following 500 mating cycles.
Assembly mated with applicable adapters for a duration of one week. All electrical/ mechanical test & inspections
performed at baseline performed. See Results/ Conclusion portion of report for results.
Results / Conclusions:
• TRU 1-5/8 EIA meet /exceed 500 mating cycles, without any significant degradation to electrical / mechanical
performance parameters. The test results were summarized and recorded per the following data: See figures 4-8.
• The VSWR and contact flare diameter following the extended mate test revealed little to no change.
• There was significant plating wear on the contact (see figures 9-11), but this did not affect electrical performance.
The first signs of plating wear noticed after 60 cycles.
3
Figure 2
Figure 3
Mated configuration
Unmated configuration
TEST DATA
Contact Flare diameter measurements
Figure 4
Figure 5
Contact Flare Diameter
End 2
Number of Cycles
50
0
40
0
30
0
20
0
15
0
10
0
80
60
40
20
0.601
0.600
0.599
0.598
0.597
0.596
0.595
0
50
0
Dameter (inches)
Number of Cycles
40
0
30
0
20
0
15
0
10
0
80
60
40
0
0.601
0.600
0.599
0.598
0.597
0.596
0.595
20
Diameter (inches)
Contact Flare Diameter
End 1
4
VSWR measurements
Figure 6
Figure 7
VSWR S22
Figure 8
0.000
-0.005
-0.010
-0.015
-0.020
-0.025
Number of Cycles
50
0
40
0
30
0
20
0
15
0
10
0
80
60
40
20
Insertion Loss S21
50
0
40
0
30
0
20
0
Number of Cycles
Insertion loss measurements
0
15
0
10
0
80
60
40
20
0
0
0
0
0
0
50
40
30
20
15
10
80
1.010
1.009
1.008
1.007
1.006
1.005
1.004
1.003
1.002
1.001
1.000
Number of Cycles
Insertion Loss (dB)
60
40
VSWR
1.010
1.009
1.008
1.007
1.006
1.005
1.004
1.003
1.002
1.001
1.000
20
VSWR
VSWR S11
5
Figure 9
Baseline
Figure 10
Wear marks
Figure 11
Wear marks