TM 11-6625-2398-15-3
the top section mates with the bottom section edge to
b. Cable Assemblies.
provide a water tight-seal for the transit case when the
spring-loaded latches are locked, and the pressure-relief
Length Figure
valve is closed.
Quantity
Item
(nom)
No FSN
1
Cable W13
5 in. 1-5 6626-177-4489
2
Cable W14/W15 6 ft. 1-6 5995-905-7194
1
Cable W16
6 in. 1-5 6625-177-4490
consists of a -hybrid-junction and a variable attenuator
1
Cable W21
6 in. 1-5 6625-177-4492
combined in a single unit with a carrying handle on top of
1
Cable W32
20 ft. 1-5 6625-177-4495
the case. A card, containing calibration data pertaining to
1
Cable W39
6 ft. 1-5 6625-133-7794
the hybrid junction and attenuator insertion losses, is
1
Cable W40
6 ft. 1-5 6625-133-7805
attached to the handle. The card lists the sum channel
1
Cable W41
6 ft. 1-5 6625-133-7851
and difference channel insertion losses at both 1030 and
1
Cable W42
6 ft. 1-5 6625-133-7797
1090MHz when the ATTENUATOR dial is set at 0dB; also
1
Cable W43
6 ft. 1-5 6625-133-7796
listed are ATTENUATOR insertion losses at 1030 and
1
Cable W45
6 in. 1-5 6625-177-4493
1090MHz for ATTENUATOR dial settings of 0, 3, 6, 9, 13,
1
Cable W47
6 in. 1-5 6625-177-4494
15, 20, and 25 dB. Connectors on the front panel of the
1
Cable W48
6 ft. 1-5 6625-133-7793
unit are used to couple the hybrid junction and/or the
attenuator into a test setup by making use of cables A1W3
c. Minor Components.
(p/o hybrid attenuator) W14/W15, and W45 connected in a
configuration determined by the test.
Figure
Quantity
Item
No
FSN
c. Front Panel Test Adapter. The front panel test
1
Adapter CP1
1-6
5935-075-7008
adapter (fig. 1-4) consists of a selector switch and eight
3
Adapter CP2/CP3/CP4
1-6
5935-837-5280
test jacks mounted in a small aluminum inclosure. A cable
2
Adapter CP5/CP6
1-6
5935-177-2761
and plug, integral to the front panel test adapter, permit
2
Adapter CP7/CP8
1-6
5935-842-9614
connecting this item to the front panel of the receiver
3
Adapter CP9/CP10/CP11
1-6
5935-683-7892
transmitter of the iff set for monitoring and checking
2
Attenuator AT1/AT2
1-6
5985-128-0195
various signals of the receiver transmitter. Seven of the
2
Termination AT3/AT4
1-6
5985-861-7856
test jacks permit direct monitoring of receiver-transmitter
2
Termination AT5/AT6
1-6
5950-970-1869
signals using external test equipment. The receiver
2
Extender board A3/A4
1-6
6625-133-7806
transmitter signal available at the eighth test jack is
1
Extender board A5
1-6
6625-133-7774
determined by the setting of the selector switch.
1
Printed-circuit board
1-6
5120-450-6767
extractor MP1
1-9. Description of Cable Assemblies
1
Printed-circuit board
1-6
5120-450-6766
(fig. 1-5)
extractor MP2
a. Cable W13 is coaxial-type tuned-stub line (open
1-8. Description of Major Components
circuit at one end) used as a stripline coupler termination
when preselector tuning of the receiver-transmitter is
performed.
b. Cables W14/W15 are two-ended coaxial cables
reusable protective case which houses the components of
used in conjunction with cable W45 to connect the hybrid
the test facilities set during transit or storage. Two handles
attenuator to the iff set. Each cable is calibrated for
are provided for lifting and moving the transit case. The
insertion loss (in dB).
transit case consists of a top section and a bottom .section
c. Cable W16 is a coaxial cable having alligator-type
clips at one end and a BNC connector at the other end. It
section when the spring-loaded latches holding the two
is used to facilitate self-test signal generator rf power
sections together are released. The top section contains a
measurements in the receiver-transmitter.
compartment into which coiled cables are placed for
d. Cable W21 is a two-ended coaxial adapter cable
storage. The bottom section contains a foam filler, with
assembly used for operating frequency tests and for
cutouts for storing the other components of the test
oscillator/exciter output measurements. It is connected
facilities set. The index card locates the correct storage
space for all components. Gasketing around the edge of
1-4
Change 1
Previous Page
