2 PN: 10410-00072 Revision: J 3670x50 Semi-Rigid Cables OMM
4. PRECAUTIONS
ANRITSU series 3670x50 cables are precision
laboratory items and should receive the same care
and respect afforded other such equipment.
Complying with the following precautions will
guarantee longer cable life and less equipment
downtime due to connector failure. Also, such
compliance will ensure that cable component failures
are not due to misuse or abuse—two failure modes
not covered under the ANRITSU warranty.
a. Bend Cables Carefully. Never bend the cable
sharply. Use gentle radius bends only. Place
bends in the center portion of cable; never bend
near the connectors. Avoid twisting cable; loosen
and re-tighten connectors, if necessary.
b. Beware of Destructive Pin Depth of Mating
Connectors. Measure the center conductor depth
of DUT connectors that mate with 3670x50 cable
connectors, before mating. Use an ANRITSU
Pin Depth Gauge (Figure 2), or equivalent. Based
on RF components returned for repair, destructive
center conductor depth of mating connectors is
the major cause of failure in the field. When a
3670x50 cable connector is mated with another
connector having a destructive pin depth,
damage will likely occur to the cable connector.
(A destructive pin depth has a center conductor
that is too long in respect to the reference plane of
the connector.)
The center conductor depth of 3670x50 cable
connectors have a tolerance measured in mils
(1/1000 inch). Test device connectors that mate
with these cables may not be precision types and
may not have the proper center conductor depth.
They must be measured before mating to ensure
suitability.
If the test device center conductor is too long, it
will measure out of tolerance in the “+” region
(Table 2). Mating under this condition will
possibly damage the cable center conductor.
If the test device center conductor is too short it
will measure out of tolerance in the “–” region.
This condition will not cause damage; however,
it may result in a poor connection and result in a
degradation of performance.
c. Avoid Over Torquing Connectors. Over
torquing connectors is destructive; it may damage
the connector center pins. Always use a connector
torque wrench when tightening GPC and other
precision type connectors. (The wrench should be
set to 8 inch-pounds maximum.) Never use pliers.
d. Avoid Mechanical Shock. Do not drop or other-
wise treat 3670x50 cables roughly. Mechanical
shock or rough handling will decrease the useful
life of these cables. Avoid introducing a bend
radius of less than 3 inches.
e. Keep Cable Connectors Clean. The precise
geometry of the precision connectors that makes
the high performance of these cables possible can
be easily disturbed by dirt and other contami-
nation adhering to connector interfaces. When not
in use, keep the connectors covered. Refer to
section 7 for cleaning instructions.
5. CONNECTING AND USING CABLES
Connect the female connector of one 3670x50 cable to
the Port 1 connector of the test set. Repeat for Port 2
with the second cable (if used). When connecting
cables, use a connector torque wrench and observe all
other precautions described above.
Figure 2. Pin Depth Gauge Scale
Table 2. Allowable Mating Connector Pin Depth
Connector Pin Depth Type (Inches)
GPC-7 +0.000 to –0.003
K +0.000 to –0.005
V +0.000 to –0.004
N Male –0.207 to –0.227
N Female +0.207 to +0.187
