Shure fp42 owners manual

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3 is recommended for normal use to provide approximately 14 dB of headroom from operating level to clipping level. The VU meters are illuminated by a single cartridge-type, 6.3V in- candescent lamp, operating well under its normal rating for a life ex- pectancy of greater than 10,000 hours. The lamp is only lit for ac operation. Consequently, the illumination serves as a visual alarm if the ac is interrupted and the unit has switched to battery operation. The VU meters are connected on the primary side of the output transformer to assure protection from any dc level on a telephone line. Telephone interconnection When using the FP42 connected directly to a telephone line, check to see whether the telephone company requires an interface cou- pler between the FP42 and the telephone line. If a coupler is re- quired, make certain the coupler selected and the wiring arrange- ment are in compliance with local telephone company regulations. Connect the telephone line to the left or right Output connector and turn the Pan controls so that the entire output signal is on the tele- phone-connected output, or switch to mono operation. Telephone Line Surge Protection When using the FP42 connected directly to a telephone line subject to lightning-induced voltage surges, the following part (commer- cially available) can be installed across the output terminals to pro- vide additional protection for output circuit components: Metal Ox- ide Varistor, General Electric Co., Type No. V22ZA1. SPECIFICATIONS Frequency Response (ref 1 kHz) 30 to 20,000 Hz, +1, –3 dB Voltage Gain (at 1 kHz) OUTPUT INPUT LINE MICROPHONE MIX BUS PHONES PHONES (CUE) Mic 90 dB 40 dB 25 dB 100 dB 85 dB Line 40 dB –10 dB –25 dB 50 dB 35 dB Mix Bus 55 dB 5 dB – 62 dB – Inputs IMPEDANCE (at 1 kHz) INPUT CLIPPING LEVEL INPUT FOR USE WITH ACTUAL INPUT CLIPPING LEVEL (at 1 kHz) Mic 19–600 ohms 1k –40 to –5 dBV* Line Less than 10k 66k +10 to +45 dBV* Mix Bus 3.5k 3.5k 0 dBV *Dependent on input control setting. Outputs IMPEDANCE (at 1 kHz) OUTPUT CLIPPING LEVEL OUTPUT FOR USE WITH ACTUAL OUTPUT CLIPPING LEVEL (at 1 kHz) Mic 150 ohms <1 ohm –33 dBV min. across150 ohms Line 600 ohms 185 ohms +18 dBm min. across 600 ohms Mix Bus 3.5k 3.5k –15 dBV min. across 3.5k Headphones 8–2000 ohms 100 ohms +6 dBV min. across 200 ohms Noise Equivalent Input Noise: –129 dBV (low-impedance micro- phone, 150 ohms, 300 to 20,000 Hz) into 600-ohm load at full gain Equivalent Input Hum and Noise: –127 dBV (low-impedance microphone, 150 ohms, 20 to 20,000 Hz) into 600-ohm load at full gain Output Noise: –70 dBV maximum (output control full counter- clockwise [off]), –55 dBV maximum (output control full clockwise [on]) (input control down, 300 to 20,000 Hz) Output Hum and Noise: –62 dBV maximum (output control down), – 53 dBV max. (output control up, input control down, 20 to 20,000 Hz)Distortion 0.4% or less THD, 30 to 20,000 Hz at + 15 dBm output; 0.5% or less IM distortion at +15 dBm output into 600 ohms Common Mode Rejection 65 dB minimum with input of – 20 dBV at 100 Hz Control Interaction Less than 1 dB with any control combination Overload and Shorting Protection Shorting outputs, even for prolonged periods, will cause no dam- age; microphone input will not be damaged by signals up to 3V Separation (left and right outputs) 40 dB minimum at 10 kHz; 50 dB minimum at 1 kHz Low-Cut Filters 6 dB per octave rolloff at 150 Hz Limiter Threshold: Adjustable, +8 to +14 dBm Attack Time: 3 msec typical Recovery Time: 500 msec typical Peak/Limiter Indicators Limiter out: lights 6 dB below clipping Limiter in: lights at onset of limiter action Phase All outputs in phase with all inputs. Pin 2 is high with respect to pin 3; pin 1 is ground. Tip of mix bus jack in phase with pin 3. Tip and ring of headphone jacks in phase with pin 2 of left and right outputs, respectively. Tone Oscillator 1 kHz; +18 dBm maximum at both outputs with Master level full up Phantom Power 30 Vdc nominal, 3.3k series resistance, automatically disabled with input switch in Line position Operating Voltage Ac Operation: 120 or 240 Vac ±10% (internally selectable), 50/60 Hz, 6W Dc Operation: 27 Vdc nominal at 30 mA typical no-signal, 32 mA typical at 0 VU (+4 dBm) output; 21.5 Vdc minimum; battery life approximately 10 hours with alkaline batteries at +4 dBm output in continuous use; three 9-volt batteries, type NEDA 1604A Temperature Range Operating: –18° to 57°C (0° to 135°F) Storage: –29° to 71°C (–20° to 160°F) Dimensions 79.5 mm H x 310 mm W x 230 mm D (3–1/8 in. x 12–7/32 in. x 9–1/16 in.) Weight Net: 2.95 kg (6 lb 8 oz) Packaged: 3.45 kg (7 lb 10 oz) Certifications Listed by Underwriters Laboratories, Inc.; listed by Canadian Standards Association as Certified ACCESSORIES The Model A16R Rack Panel Kit consists of a 19 in. x 3–1/2 in. (483 mm x 89 mm) precut rack panel and necessary hardware for rack-mounting the FP42 with its cover in place and end caps re- moved in a standard 19 (483 mm) rack panel.