SCALE IS 5 DECIBELS PER DIVISION
Polar Pattern
200 Hz
LEGEND
5 kHz
1 kHz
8 kHz
240
180
210
270
300
330
0
150
120
90
30
60
12" or more on axis (flat)
10050 200
LEGEND
Roll-off
10k5k1k500 2k 20k
Frequency in Hertz
Frequency Response
ResponseindB
10 dB
· Designed for video production and broadcast (ENG/EFP) audio
acquisition
· Short length (11") ensures mic stays out of the shot ­ even when
used with compact digital cameras
· Smooth, natural-sounding on-axis audio quality
· Provides the narrow acceptance angle desirable for long-distance
sound pickup
· Excellent sound rejection from the sides and rear of mic
· Switchable low-frequency roll-off
· Operates on battery or phantom power
The AT897 requires 11V to 52V DC phantom power or a 1.5V AA
battery for operation. A battery need not be in place for phantom
power operation.
Battery installation: Unscrew the lower section of the microphone
body, just below the nameplate. Insert a fresh 1.5V AA battery
in the handle compartment ("+" end up), then reassemble the
microphone. Alkaline batteries are recommended for longest life.
Remove the battery during long-term storage.
Output from the microphone's XLRM-type connector is low
impedance (Lo-Z) balanced. The signal appears across Pins 2 and
3; Pin 1 is ground (shield). Output phase is "Pin 2 hot" ­
positive acoustic pressure produces positive voltage at Pin 2.
To avoid phase cancellation and poor sound, all mic cables must be
wired consistently: Pin 1-to-Pin 1, etc.
An integral 80 Hz high-pass filter provides easy switching from a flat
frequency response to a low-end roll-off. The roll-off position
reduces pickup of low-frequency ambient noise (such
as traffic, air-handling systems, etc.), room reverberation and
mechanically coupled vibrations.
Avoid leaving the microphone in the open sun or in areas where
temperatures exceed 110° F (43° C) for extended periods.
Extremely high humidity should also be avoided.
AT897 SPECIFICATIONS
ELEMENT Fixed-charge back plate
permanently polarized
condenser
POLAR PATTERN Line + gradient
FREQUENCY RESPONSE 20-20,000 Hz
LOW FREQUENCY ROLL-OFF 80 Hz, 12 dB/octave
OPEN CIRCUIT SENSITIVITY ­40 dB (10.0 mV) /
(Phantom / Battery) ­41 dB (8.9 mV) re 1V at 1 Pa*
IMPEDANCE (Phantom / Battery) 200 ohms / 300 ohms
MAXIMUM INPUT SOUND LEVEL 129 dB / 115 dB SPL,
(Phantom / Battery) 1 kHz at 1% T.H.D.
SIGNAL-TO-NOISE RATIO1
77 dB, 1 kHz at 1 Pa*
DYNAMIC RANGE (typical) 112 dB / 98 dB,
(Phantom / Battery) 1 kHz at Max SPL
PHANTOM POWER 11-52V DC, 2 mA typical
REQUIREMENTS
BATTERY TYPE 1.5V AA/UM3
BATTERY CURRENT / LIFE 0.4 mA / 1200 hours typical
(alkaline)
SWITCH Flat, roll-off (recessed)
WEIGHT (less accessories) 5.1 oz (145 g)
DIMENSIONS 10.98" (279.0 mm) long,
0.83" (21.0 mm) diameter
OUTPUT CONNECTOR Integral 3-pin XLRM-type
ACCESSORIES FURNISHED AT8405a stand clamp for 5
/8"-27
threaded stands; AT8134
windscreen; battery; 5
/8"-27 to
3
/8"-16 threaded adapter;
protective carrying case
In the interest of standards development, A.T.U.S. offers full details on its test
methods to other industry professionals on request.
*1 Pascal = 10 dynes/cm2
= 10 microbars = 94 dB SPL
1
Typical, A-weighted, using Audio Precision System One.
Specifications are subject to change without notice.
Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224
Audio-Technica Limited, Old Lane, Leeds LS11 8AG England
www.audio-technica.com
P51618-01-EN ©2004 Audio-Technica U.S., Inc. Printed in Japan
AT897 LINE + GRADIENT CONDENSER MICROPHONE