Dynamic Microphone  (210-1177)    Specifications       Faxback Doc. # 16367

ELECTRICAL REQUIREMENTS (Pre-Amplifier)

Output Sensitivity:..................-64 +/- 3dB at 1 KHz (0dB=1V/Microbar)
Frequency Response:.........................................300 Hz to 4 KHz
Battery Type:....................................DC 3 voltages (UM-4-2 PCS)
Current Consumption:...............................................5mA Max.
Impedance:................................................300 Ohms at 1 KHz

ELECTRICAL REQUIREMENTS (Without Pre-Amplifier)

Output Sensitivity:.................-73 +/- 3 dB at 1 KHz (0dB=1V/Microbar)
Impedance:................................................500 Ohms at 1 KHz
Frequency Response:........................................200 Hz to 10 KHz

MECHANICAL REQUIREMENTS

Durability of Switch:.................Normal after 100,000 cycles operation
Cord Strain Relief:.....................Normal after supplied 5 Kg force at
                                          both end of mic or plug for 1 sec
Drop Test:.......................Normal after free fall from 1 meter height
                                    to concrete floor each one for 5 times.
Vibration Test:.................Normal after vibrations, 12 Hz to 55 Hz for
                                  1 minute full amplitude 2mm for 1.5 hours
                                                             at three axes.
Temperature Cycle Test:.......After exposure at -10C for 1 hour, at 25C for
                             1 hour, at 55C for 1 hour, 2 cycles, frequency
                                     response, sensitivity should be within
                                specifications.  (The measurement should be
                                 done after 2 hours of conditioning at 25C)
Humidity Test:............After exposure at 40C and 90-95% RH for 48 hours,
                           frequency response, sensitivity should be within
                                                            specifications.
Operating Temperature:..........................................-10C to 55C
Battery Low Indication:....The indicated LED is lighted at DC 1.8V +/- 0.3V
Operating Voltage of Pre-Amplifier:.................From DC 1.5V to DC 3.0V
Weight:................................................................248g


(ALL-08/07/95)