AT897 LINE + GRADIENT CONDENSER MICROPHONE
•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.
The microphone is RoHS compliant–free from all substances specified in the EU directive on hazardous substances.
Avoid leaving the microphone in the open sun or in areas where temperatures exceed 43° C (110° F) 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) |
145 g (5.1 oz) |
|
|
DIMENSIONS |
279.0 mm (10.98") long, |
|
21.0 mm (0.83") 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.
Polar Pattern
|
0 |
330 |
30 |
300 |
60 |
270 |
90 |
240 |
120 |
210 |
150 |
|
180 |
SCALE IS 5 DECIBELS PER DIVISION
LEGEND
200 Hz
1 kHz
5 kHz
8 kHz
|
|
|
Frequency Response |
|
|
|
|
|
|
|
|
|
|
|
|
|
10 dB |
50 |
100 |
200 |
500 |
1k |
2k |
5k |
10k |
20k |
Frequency in Hertz
LEGEND |
|
12" or more on axis (flat) |
Roll-off
Response in dB
Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224 Audio-Technica Limited, Old Lane, Leeds LS11 8AG England www.audio-technica.com 
P51973 ©2007 Audio-Technica U.S., Inc. Printed in Japan
Loading...