I. How the Cricket works A. Send unit: 1. OFF-ON: This switch turns the unit on and off. 2. LO-HI-SPKR: a. LO: Produces balanced low level output on the 1/4" balanced and XLR jacks with pin #1 and sleeve ground, pin #2 and tip positive, and pin #3 and ring negative. Produces balanced hi level output on the 1/4" balanced and XLR jacks with pin #1 and sleeve ground, pin #2 and tip positive, and pin #3 and ring negative. Produces a positive acoustic output from the internal speaker which is disconnected when the 1/4" unbalanced jack is used. This output will drive a speaker directly with tip positive.
B. Balanced cable fault indications. 1. An intact properly polarized device will light the green LED in the 2-T position and the red LED in the 3-R position. 2. If #1 or sleeve is open or there is a dead short between any two conductors, neither LED will light. 3. If #2 or tip is open, no LED will light in the 2-T position and the red LED will light in the 3-R position if #1/sleeve and #3/ring are intact and properly polarized. 4. If #3 or ring is open, the green LED will light in the 2-T position and no LED will light in the 3-R position if #1/sleeve and #2/tip are intact and properly polarized. 5. If #1/sleeve and #2/tip are reversed and #3/ring is intact, the red LED will light in the 2-T position. No LED's will light in the 3-R position. 6. If #1/sleeve and #3/ring are reversed and #2/tip is intact, the green LED will light in the 3-R position. No LED's will light in the 2-T position. 7. If #2/tip and #3/ring are reversed and #1/sleeve is intact, the red LED will light in the 2-T position and the green LED will light in the 3-R position. C. Unbalanced device continuity and polarity: 1. In the 2-T position the green LED should light. If the red LED lights, the circuit is reversing the polarity. If neither LED lights then there is either a short between #1/shield and #2/tip or an open circuit. 2. In the 3-R position most unbalanced devices ground these connections. Whatever the case, no LED's should light in this position. Quick reference charts are located on the bottom of the Send and Receive units. 10
b. HI:
c: SPKR:
B. Receive unit: 1. OFF-BAT-ON: This switch turns the unit on and off. With the switch in the BAT position, the green LED lights if the battery is good. Replace the battery if the green LED does not light or is very dim.
