Using the Phase Tester, Dipole Surrounds, Cricket-R

8.2.2Dipole Surrounds

Regardless of model there is one standard for phase configuration of Dipole surrounds.

Figure 16.

8.2.3Direct Radiating Point Source Surrounds

Figure 17.

8.3 Using the Phase Tester

The Galaxy Audio phase tester consists of two battery operated instruments, Cricket-S is the "sender", and Cricket-R is the "receiver".

are two slide switches and a pulse indicating LED. Slide the ON/OFF switch to the ON position and the output selector to the LO position. You should now hear pops at one second intervals from the speaker under test. If a higher level is required, set the output selector to HI.

8.3.2Cricket-R

The receiver contains a microphone and phase analysis circuitry. Positive polarity is indicated by a green LED, negative by a red LED. Two input connectors and the microphone are located on the rear panel. There is also a switch marked "CON" (continuity) and "POL" (polarity). Place this switch in the "POL" position. On the front panel are two slide switches, a rotary gain control and the two phase indicating LEDs. Slide the right side switch to the ON position and place the left side switch in the MIC position. Now move the receiver’s microphone toward the speaker being tested. W hen you are within three to six inches of the speaker you should begin to see a polarity indication. Adjust the gain control until a consistent indication of phase is realized.

8.3.1Cricket-S

The sender generates a short duration, positive polarity pulse. This is applied to the power amplifier input which drives the loudspeaker being tested. Coincident with the generation of each pulse, a green LED is illuminated. Three output connectors are located on the rear panel. Line level male XLR, line level female ¼" phone jack and a speaker level female ¼" phone jack. A female XLR to RCA adapter cable is provided in the kit. Plug this cable into the XLR connector and use it to connect the sender to each channel for test. On the front panel

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SDEC -X000 DACS Calibration Manual v1.0.doc

SDEC-4000, SDEC-3000 specifications

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