Table of Contents
Introduction
Operation.................................................. 2
Battery Installation
.................................2
Connections...........................................2
Select Test.............................................2
Indications............................................. 3
Advanced Tests...................................3
Other Special Cables.............................4
Custom Cables......................................5
Warranty.....................................................7
Registration Card...........................Back Cover
................................................1
Introduction
Thank you for purchasing the Galaxy Audio JIB/CT Cable Tester.
The CT is designed to test a wide variety of commonly used audio
cables and quickly answer the question, “Is this cable good or bad?”
A unique computer controlled circuit tests the cable 200 times per
second, which allows the CT to detect and display intermittent
problems that other cable testers fail to catch. The CT control panel
simply consists of a rotary switch, one Green LED, and one Red
LED. A quick reference chart is located on the bottom of the unit.
TOP BOTTOM
Connectors and Controls
1
Operation
1. Battery Installation: Switch to OFF position. Remove the Battery
Drawer and install a 9-volt alkaline battery, being careful to not
pinch any of the wires when reinstalling the Drawer. Due to the low
power consumption design and the Auto Shutoff feature, the battery
life of a standard 9V alkaline should be over 100 hours. The Auto
Shutoff feature switches off the CT after approximately 5 minutes
of inactivity. To reset the CT after Auto Shutoff, simply rotate the
switch to the “Off” position and then back to your previous setting.
If the Red LED becomes too dim to see, replace the battery with a
fresh 9V alkaline.
2. Connections: Plug one end of the cable to be tested into the
appropriate connector on the “A” side of the CT, and the other end
of the cable into the “B” side. All of the connectors on the “A” side
are duplicated on the “B” side except for the XLR jacks, where the
“A” side has a Female XLR and the “B” side has a Male XLR.
CAUTION: Do not connect the CT to any audio device or system.
Damage may result to the CT and/or the audio device.
3. Select Test: Rotate the switch to select the number of conductors
within the cable.
NOTE: For accurate results it is necessary to select the correct
number of conductors within the cable under test. If in doubt, you
may want to remove one of the connector covers to count the
conductors emerging from the cable.
The following chart lists the number of conductors found in
commonly used audio cables. When speaking of 1/4” or 1/8”
connectors, the terminology TRS (Tip, Ring, Sleeve) is used to
describe the conductors as they appear on the plugs. A Mono cable
(2 conductor) would use only the Tip and Sleeve (TS), while a
Stereo or balanced cable (3 conductor) would use all three Tip,
Ring, and Sleeve (TRS).
2
NUMBER OF
CONDUCTORS
(Switch position)
CABLE TYPES
2
¼” Mono (TS) Guitar / Line, ¼” Speaker, 1/8” Mono (TS) Line,
Single RCA (use only the L (Mono) jacks on CT), NL2 Speakon
Cables (and 4 conductor NL4 Speakon connectors wired for 2
conductor service), and 2 conductor adapter cables that have
mismatched connectors of the above types.
3
Stereo (TRS) ¼”, Stereo (TRS) 1/8”, Most XLR Mic cables, XLR
to TRS Adapters, Stereo (TRS) ¼” or 1/8” to Stereo (L&R) RCA
Adapters, and other 3 conductor adapter cables that have
mismatched connectors of the above types.
4
NL4 Speakon Cables, Stereo (L&R) RCA, Some XLR Mic
Cables (if the #4 shell conductor is used)
5
DIN (MIDI) cables (some may be wired to use only 3 conductors
of the 5 available)
4. Indications: As the Selector Switch is rotated from the OFF
position, the Green LED will blink twice to indicate the CT is ready
to test. The Red LED will then light momentarily to indicate the
cable is being tested. If the cable fails the test, the Red LED will
remain lit. If the cable passes the test, the Red LED will go out and
the Green LED will light. At this point you may want to check for
intermittent problems by flexing or wiggling the cable. Be aware
that cables can become intermittent because of wiring problems or
failure of the connector contacts. Any change in the LED
indications, even if only momentary, means that the cable has an
intermittent problem and cannot be relied upon.
5. Advanced Tests: Most of the standard audio cables will test
either Pass or Fail according to the indications described above.
However, there are some alternative indications given for Pass and
Fail for certain cables. The chart below describes some of these
cables and what indications to expect.
3
CABLE
TYPE
SWITCH
POSITION
INDICATIONS
Any 2
Conductor
(Mono) “Y”
Cables
(Splitters)
2
Test in two steps. Plug Common connector into “A”
side of CT and one of “Y’d” ends into “B” side. LEDs
indicate Pass/Fail. Unplug first “Y’d” end and plug in
second “Y’d” end to “B”side. LEDs indicate
Pass/Fail. Do not use Right(R) RCA jacks for this
test.
Any 3
Conductor
(Stereo) “Y”
Cables
(Splitters)
3
Test in two steps. Plug Common connector into “A”
side of CT and one of “Y’d” ends into “B” side. LEDs
indicate Pass/Fail. Unplug first “Y’d” end and plug in
second “Y’d” end to “B”side. LEDs indicate
Pass/Fail. This test is not for cables with RCA jacks.
Stereo (TRS)
¼” or 1/8” to
Stereo (L&R)
RCA
adapters.
3
Plug the TRS into the “A” side and plug the RCA
connectors into the “B” side L&R RCA jacks
(observe L&R markings on cable, if provided.)
Alternately blinking Red and Green LEDs indicate a
correctly wired cable. (Correct wiring for this cable
is: T to Tip of RCA (L), R to Tip of RCA (R), S to
both RCA Shields.) A steady Red or Green LED
indicates a failure for this cable. If a steady Red
LED is shown, try reversing the L&R RCA plugs
(some are unmarked.)
XLR Mic
3
If Green and Red LEDs blink alternately, it indicates
pins 4 (shell) and 1 are shorted together. This cable
may work OK, but it is not considered correct
wiring.
XLR Mic
4
A Green LED indicates the 4th conductor is wired
correctly (shell to shell). If the Red LED is lit under
this test, try switching to the 3-conductor position to
test for a pin 4 to pin 1 short as in the example
above.
DIN (MIDI)
5
If the cable fails on the 5-conductor position, try
switching to the 3 conductor setting. Some MIDI
cables are wired this way and may work fine in your
application. Check with cable manufacturer if in
doubt.
6. Other Special Cables: Male-to-Male or Female-to-Female XLR
Cables: Use a known good adapter cable to “change the gender”
of one of the cable ends by connecting it in series with the cable
under test. Female TS or TRS connectors: Use a known good
Male-to-Male cable to “change the gender” to Male by connecting it
in series with the cable under test.
4
7. Custom Cables. The CT is designed to test industry standard
and commercially available cables and adapters. The CT may not
give accurate results for cables wired otherwise.
NOTES
5
6
ONE YEAR LIMITED WARRANTY
This warranty gives you specific legal rights, and you may also have other rights which
may vary from state to state. This warranty is extended to the purchaser and to any
purchaser from him/her for value.
GALAXY AUDIO warrants the materials and workmanship of its products for a period of
one year from the date of the original purchase.
The following are not covered by the warranty:
1. Damage to or deterioration of the exterior cabinet which occurs after delivery.
2. Damage after initial delivery resulting from accident, misuse or neglect.
3. Damage resulting from failure to follow instructions contained in the owner’s manual.
4. Damage resulting from the performance of repairs by someone other than GALAXY
AUDIO.
5. Damage occurring during the shipment or delivery of any GALAXY AUDIO product to
GALAXY AUDIO after initial delivery of the product to you.
6. Damage to any GALAXY AUDIO product which has been altered, or on which the
serial number has been effaced or removed.
If your unit requires service, it must be returned, shipping charges prepaid to GALAXY
AUDIO in the United States. (This warranty is not enforceable outside the U.S.) Please
call or write GALAXY AUDIO, 601 E. Pawnee, Wichita, Kansas 67211, (316) 263-2852.
We will then issue you to an RMA# (Return Merchandise Authorization) which will need
to be applied to the returned item. Under no circumstances should you return your unit to
the factory without receiving an RMA or written instruction to do so. If service is
required, you must present the original or a copy of the bill of sale as a proof of date of
purchase of your unit. Upon receipt of your unit for service, GALAXY AUDIO will
repair or replace your unit as soon as possible, but in no event later than 30 days after the
receipt of the unit. We will return the unit to you, shipping charges prepaid, provided the
necessary repairs are covered by this warranty.
IMPLIED WARRANTIES OF MERCHANT ABILITY AND FITNESS FOR
PARTICULAR PURPOSE ARE LIMITED IN DURATION TO THE LENGTH OF THIS
WARRANTY, UNLESS OTHERWISE PROVIDED FOR BY STATE LAW. GALAXY
AUDIO’S LIABILITY IS LIMITED TO THE REPAIR OR REPLACEMENT, AT OUR
OPTION, OF ANY DEFECTIVE PRODUCT, AND SHALL IN NO EVENT INCLUDE
INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY KIND. SOME STATES
DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY
LASTS AND/OR DO NOT ALLOW THE EXCLUSION OR LIMITATION OF
INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATIONS
AND EXCLUSIONS MAY NOT APPLY TO YOU.
GALAXY AUDIO does not authorize any third party, including any dealer or Authorized
Service Center, to assume any liability on behalf of GALAXY AUDIO or to make any
warranty for GALAXY AUDIO.
7
GALAXY AUDIO
601 E. Pawnee
Wichita, KS 67211
(316) 263-2852
(800) 369-7768
Fax: (316) 263-0642
www.galaxyaudio.com
Specifications subject to change without notice.
8
REGISTRATION CARD
Registration information is used ONLY by GALAXY
AUDIO and will be kept strictly confidential.
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Name________________________Phone_____________
Registration
Address________________________________________
City, State, Zip____________________________________
email_______________________
Serial number Model
Dealer_______________________PurchaseDate________
This Galaxy Audio product will be used for:
Live Sound o
Church o
Recording
Home/Project Studio o
Commercial Studio o
Post-Production/Mastering o
Broadcast
On-Air o
Production o
WICHITA, KS 67216-0285
P.O. BOX 16285
GALAXY AUDIO
HERE
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PLACE
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