Shure 888TT user manual

Summary of the content on the page No. 1

Shure Brothers Incorporated
222 Hartrey Avenue
Evanston IL 60202-3696 U.S.A.
Model 888TT User Guide
DTMF AIRCRAFT MICROPHONE
humidity. The voice-entry port is at the top of the micro-
phone body for simple, natural transmitting. The rugged

ARMO-DUR case is immune to oil, grease, most fumes
and solvents, salt spray, sun, rust and corrosion. The
888TT is outstanding in its ability to withstand mechanical
TM
shocks and vibration. Its Million-Cycle Plus leaf-type
switch is a double-pole, single-t

Summary of the content on the page No. 2

SPECIFICATIONS Dimensions See Figure 2 Type Electret condenser, noise canceling, with transistor pre- amplifier, DTMF signaling circuitry, illuminated keypad 1.9 mm 42.6 mm (5/64 IN.) Frequency Response (1–11/16 IN.) 200 to 4,000 Hz (see Figure 1) 25.4 mm 36.9 mm (1 IN.) (15/32 IN.) +10 0 –10 101 mm (3-31/32 IN.) 20 50 100 200 500 1,000 2,000 5,000 10,000 20,000 TYPICAL FREQUENCY RESPONSE FIGURE 1 Polar Pattern Bidirectional, noise canceling 64 mm 40.4 mm (2-1/2 IN.) (1-19/32 IN.) Electrical Cha

Summary of the content on the page No. 3

Microphone connector wiring is shown in the table below. Microphone Connector Wiring Pin Color Function Pin Color Function 1 N.C. 5 Black PTT DTMF LEVEL Switch ADJUST (C) Ground 2 White Dc Bias (+), 6 Red Audio Out Audio Out (Ac MICROPHONE coupled) SENSITIVITY ADJUST (B) 3 Yellow PTT Switch 7 Drain Ground 4 Blue NC 8 N.C. CABLE RELEASE (A) The ALM-88 cable is wired at the microphone connector MICROPHONE CASE BACK as shown in Figure 3 at the bottom of the page. FIGURE 4 2. DTMF output: Press and

Summary of the content on the page No. 4

ENVIRONMENTAL QUALIFICATION FORM, TSO-C58a DO-170 PARA. # DO-160C CONDITIONS DESCRIPTION OF TESTS PARA. # 3.1.1 Ground Survival Low Tempera- 4.5.1 Microphone tested to Category D1 ture and Operating Low Tem- perature 3.1.2 Ground Survival High Temper- 4.5.2 Microphone tested to Category D1 ature and Short-Time Operat- ing High Temperature Operating High Temperature 4.5.3 Microphone tested to Category D1 3.1.3 Altitude 4.6.1 Microphone tested at altitude equivalent to 15,200 m (50,000 ft) = 11.6