Contents
p. 2Applic.
pp. 4-8

Selection
pp. 9-11

Products
pp. 12-87

GenRadproducts
pp. 50-87

高度キャパシタンス
PrecisionCapacitance
測定システムMeasurement SystemIndexp. 89

1232-A Tuned Ampifier And Null Detector
最新の注意を要する多くのブリッジ測定には1232-Aの様な感
A sensitive null detector like this is the key to manya fussy bridge measurement. Battery operation frees
度の高いヌル検出器が重要です。バッテリー駆動なので電源
the 1232 from power-line noise and makes it ultra
ラインからのノイズはなく、持ち運びも便利です。低ノイズ
portable. Low-noise solid state circuitry and high gainの固定素子回路と高ゲインなので感度が非常に高くなっていmake it very sensitive. Its tunability and choice ofます。同調機能とバンド幅の選択により測定の妨害となるブ
bandwidth enable your to reject broadband noise as
ロードバンドノイズ及び高調波を除去できます。
well as the harmonics that might otherwise impair
good measurements.
Bridgedetector at audio frequencies;
with 1232-P2
音声周波数でのブリッジ検出器;
1232-P2プリ
アンプがあるので極めて高いインピーダンス
Preamplifier it is equally sensitive for extremely highソースに対しても同様に感度が高い
impedance sources

概算測定用高感度オーディオウェイブアナ
Sensitive
audio wave analyzer for approximate
ライザー
measurements

汎用の同調可能なオーディオアンプあるいはブAudio
preamplifier and general-purpose, tunable or
ロードバンドアンプbroadband audio amplifier

感度0.1μS
0.1
μS sensitivity

20 Hz to 20 kHz, 50 and 100 kHz
バンド幅約5%
Bandwidth
approximately 5%
ゲイン120dB
120dB gain

SPECIFICATIONS
仕 様
周波数:Frequency:
Tunable filters:20 Hz to 20 kHz in 3 ranges, between 2%
and 6% bandwidth to 15 kHz. Second harmonic at least 34 dB downfrom peak, third harmonic at least 40 dB down, rejection filter on two
highest ranges reduces 60 Hz level to at least 60 dB below peak response (50 Hz level is down >50 dB). Dial accuracy is ±3%.
Fixed-Tunable Filters: 50 kHz, 2-nd harmonic is 44 dB down; 100kHz, 2-nd harmonic is 53 dB down.
Flat Response: ±3 dB from 20 Hz to 100 kHz.

感度:
Sensitivity:
See fig. 1. Typically better than 0.1 μS over most of thefrequency range.

NoiseLevel:
Referred to input: See fig. 2. Noise at 1 kHz < 2
ノイズレベル:dB at optimum source impedance of 27 kΩ. Referred to output: < 5 mV
on FLAT filter-frequency position, main gain setting, and 20 dB switch
position. <50 mV in MAX SENS position.
SignalInput:
信号入力:
Impedance:Approximately 50 kΩ at max gain; varies inversely with gain to 1 MΩ at min gain.
Max Safe Voltage:
200 Vac or 400 Vdc.
Output:
出力:Voltage Gain: Approximately 120 dB on the tunable ranges;
100 dB, flat range; 106 dB at 50 kHz; 100 dB at 100 kHz position.
Level: 1 V into 10 kΩ when meter indication is full scale.
Internal Impedance: 3 kΩ.
Meter Linearity: dB differences are accurate to ±5% ±0.1%
division for inputs of less than 0.3 V.
Compression: (meter switched to LOG) Reduces full-scalesensitivity by 40 dB. Does not affect bottom 20% of scale.
Attenuation: (meter switched to - 20 dB). Linear response with 20 dB
less gain than MAX SENS.
Distortion:
歪み: (filter switched in FLAT position): <5 % (due to meter rectifiers).
Terminals:
端子:
Input:
874 Coaxial Connector.
Output: binding posts.
Available: 1232-P2 Preamplifier to maintain sensitivity of1232-A at low frequencies when operating from a source impedance
above 100 kΩ.

Features
特性
電源:Power:
12 Vdc, from 9 mercury (Eveready type E4 orequivalent) cells in series. Estimated battery life 1500 hours.

Dimensions:
大きさ:15.2 cm H x 20.3 cm W x 19.0 cm D
(6" x 8" x 7.5").

Mechanical:

Weight:重さ:

2.6 kg (5.75 lb) net, 3.7 kg (8 lb) shipping.

Convertable-bench cabinet.

ORDERING
INFORMATION
オーダー情報1232-A

1232-9701 Tuned Amplifier and Null Detector

1232-AP1232-9829 Tuned Amplifier and Null Detector with preamplifier

IET LABS, INC. in the GenRad Tradition
534 Main Street, Westbury, NY 11590
82

Electronic cat/1232A/05-26-05

www.ietlabs.com
TEL: (516) 334-5959 • (800) 899-8438 • FAX: (516) 334-5988