Audiocom NFL-2002 사용 설명서 - 페이지 4

{카테고리_이름} Audiocom NFL-2002에 대한 사용 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. Audiocom NFL-2002 6 페이지. Beltpacks

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Figure 1. NFL-2002 Connections and Controls

SPECIFICATIONS

GENERAL:

Power Requirements:

Channel supplied: 24 VDC nominal, 40 to 100 mA

Local-power: 24 VDC nominal (21 to 30 VDC), 40 to 100 mA

Environmental Requirements:

Storage:

-20ºC to 80ºC; 0% to 95% humidity, non-condensing

Operating:

-15ºC to 60ºC; 0% to 95% humidity, non-condensing

Dimensions:

5.0" (127 mm) H x 3.5" (88.9 mm) W x 1.8" (45.7 mm) D

Weight:

1.5 pounds (0.68 kg)

INTERFACE REQUIREMENTS:

Headset:

1000 - 3000 ohm electret microphone

50 - 200 ohm dynamic microphone

150 to 600 ohm headphones

Input Level:

4 mV

(nominal)

RMS

Balanced Intercom Channel:

Output Level: 1 V

nominal

RMS

Terminating Impedance: 300 ohm ±5%

Bridging Impedance: greater than 10,000 ohm

Call Signalling:

Send: 20 kHz ±100 Hz, 500 mV

Receive: 20 kHz ±800 Hz, 100 mV

Mic-Off Frequency:

Detect: 24 kHz ±800 Hz, 100 mV

Noise Contribution: less than -60 dBu on the line

Total Harmonic Distotion: less than 1% at channel output for normal input

Unbalanced Intercom Channel:

Output Level: 775mV

±10%

RMS

Terminating Impedance: 200 ohm ±5%

Bridging Impedance: greater than 10,000 ohm

Call Signalling:

Send: 12 ±3 VDC on the line

Receive: 4 - 15 VDC from the line

Total Harmonic Distotion: less than 1% at channel output for normal input

HEADPHONE AMPLIFIER:

Maximum Output:

4.5 ±10% V

into 150Ω headset

RMS

Frequency Response:

200 Hz to 8 kHz ±2 dB

Audible Alert:

1 kHz, at the headset

Total Harmonic Distortion:

Less than 1% at less than 3.5 V

RMS

Sidetone:

20 ±3 dB minimum range, adjustable

±10%

RMS

into 150Ω headset