CABLE SCANNING1 KHZ TONE GENERATOR OPERATION
Testing Audio cablesWhen troubleshooting an audio system, having a test tone is imperative. The
The most common (but certainly not all) types of professional audio cabCS1000 has the connectors ales are:vailable for virtually every audio system in use. Thus
Speaker cables, instrument cables, microphone cables, cassette, cd, and vcr/dvdmost any audio device can be connected to the CS1000 for signal verification and
player cables, headphone/earphone adapter cables, and computer sound cardprocessing.
cables. The plugs utilized on these cables are represented on the CS1000. They
are: Banana, Speak-On?, 1/4?, RCA, 1/8? (3.5mm), and XLR.The signal from the Tone Generator is sent out the jacks on the left hand side of
the unit. This is a balanced signal and, as indicated, the positive signal is on pins 2
The remaining types of cables available for testing by the CS1000 are MIDI caband 4, and the negativlese signal is on pins 3. Pin 1 is grounded. If you are testing an
(both 5 and 7 pin), telephone cables (RJ11), and ethernet/CAT5 cables (RJ45).unbalanced device the output level indicated by the Tone Level knob is exactly half
of that shown.
To test a cable, connect the ends into their appropriate jack. Connect only one
plug per side. IMPORTANT: If you are testing a cable with more connections onThe Test Tone generator is strong enough to drive certain devices directly for
one side than the other (ie: XLR to 1/4? unbalanced or a 1/4? TRS to dual 1/4?testing without additional po TSwer. For example; a speaker may be directly con-
Insert cable), plug the end with the maximum number of connections on thenected to the CS1000 and the 1 kHz tone may be heard from the speaker. Head-
SEND side.phones can be directly driven, as well as telephone lines.
Move the Test Tone / Cable Test switch to Cable Test. Make sure the Connect a wPWR LEDorking cable to the CS1000 TONE OUTPUT SIDE (known as the
lights indicating that the CS1000 is on and the battery is sufficient fRECEIVE side when in Cabor testing.le Test mode), and move the TEST TONE / CABLE
The SEND LINE LED will light corresponding to the pin number sending the scanTEST switch to TEST TONE. Adjust the TONE LEVEL control for the appropriate
signal, and the RECEIVE LINE LED that corresponds to the pin number receivingsignal output level. If you are testing a mixer?s Microphone Input and thereby its
the signal will light as the CS1000 proceeds to scan the connections of the cabmic preamps, yleou?ll w.ant to set the TONE LEVEL around -30 to -20 dB. Otherwise
For example; if you connect a working XLR microphone cable to their correspond-you may overdrive the mic preamps. If you are testing a Line Input on a mixer or
ing jacks and move the switch to Cable Test, LEDs 1 and 1 will light, fsignal processorollowed by 2, set the TONE LEVEL around 0 to +3 dB. For direct device
and 2, then 3 and 3. A Typical Cable Scan Chart is provided on page 5 of thistesting like a speaker or headphones, set the TONE LEVEL to +7 or maximum.
manual showing which order the LEDs light when testing a few common cables.
MIDI Cables
Some MIDI cables only connect pins 3, 4, and 5 since the MIDI standard only
PHANTOM POWER TESTING _______________________________________uses these pins. Hence, if you connect a MIDI cable to the CS1000, test it and
Phantom Power Voltagenotice only pins 3, 4, and 5 are lighting - the cable is probably good.
To test phantom power voltage, connect the XLR cable with the phantom power to
be tested into either the male or female XLR jacright handk on the or SEND
side of the unit. Set the switch to Cable Test. The voltage amount will be indicatedTelephone Cables
by the PHANTOM POWER VOLTAGE LEDs. The flickering is normal. The actualSome telephone cables are wired in reverse order to properly connect the phone
voltage amount will be between the LED that?s lit and the one above it that is notline to a telephone. Pin 5 is connected to pin 2, pin 4 is connected to pin 3, and so
lit. For example, if the >32 LED is lit and the >42 LED is not, the actual phantomon. Keep in mind that a handset cable may be tested using the RJ11 jacks as well.
power voltage is between 32 and 42 volts.
Phantom Power PhaseWhen testing cables, wiggle the ends as well as the cable around to help verify
For proper phantom power operation, both pins 2 and 3 should have power
present. To ensure that both pins have power, connect the cable with the phantomthere are no shorts or opens in the cable.
power to the XLR jacks on the left hand or RECEIVE side of the unit. Set the
switch to Cable Test. If none or only one of the PHANTOM POWER PRESENT
LEDs light, there is a problem with the cable or phantom power circuitry.
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ACEC
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