声学和音频测试领域公认的领先制造商

SWR-2755B 切换器

扩展音频分析仪的2通道输入和输出功能

Audio Precision 提供三种型号的 SWR-2755 音频切换器, 扩展了音频精度双声道音频分析仪的输入和输出功能, 包括 APx555、APx555 和2700系列。(也兼容 ATS-2, System Two and System One 仪器。)

SWR-2755B 交换机取代了SWR-2755 和 SWR-2122 交换机产品系列, 每个交换机都已停产。b 系列 SWR-2755 交换机与我们当前的分析仪完全兼容, 并以更低的价格提供更好的性能。SWR-2755b 可与 SWR-2755 传统交换机互换使用。它们还可用于最初指定 SWR-2122 或 SWR-122 切换器的任何停产分析仪。

SWR-2755B 系列采用相同的功能集和 SWR-2122 的坚实完整性, 可显著降低串扰 (在不平衡600ω负载下提高 18 db; 在平衡600ω负载中更好地使用 10 db), 这是一种可自动调节所有电源的通用电源。线电压, 方便的后面板接地耳, 以及完全的 EMC 和安全法规遵从性。

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注: SWR-2755B 系列切换器是音频精度原装 SWR-2755 交换机产品的后续平台, 该产品现已正式进入耗尽供应状态。音频精度继续为原始 SWR-2755 产品提供服务。有关更多信息, 请参阅服务校准。

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特征

·输入和输出配置可切换发电机输出或分析仪输入, 或两者兼而有之。

·提供平衡和不平衡的配置。

·指示灯指示每个通道的开启或关闭状态。

·多个切换器可连接到音频精度分析仪, 将系统功能扩展到多达192个输入和输出。

·在平衡的配置中, 通道间串扰较低, 在20千赫时小于–150 db。

·所有切换器都是一个高机架单元 (ru) (1.75 ")。开关可用于工作台或机架, 安装有可选的机架安装适配器套件。

注: 使用任何带有 APx500 系列音频分析仪的 SWR-2755b 开关都需要 APIB 适配器 (USB, PCI or PCMCIA).

选项

SWR-2755B-M Output Switcher
• 12 X 2 configuration
• Can route either of the two generator output channels (A & B) to any of 12 channels
• Up to 16 units can be cascaded to allow up to 192 channels to be accessed
• XLR connectors for balanced signals or, using adapters, unbalanced signals
• Complement mode allows all but one channel to be driven while measuring the undriven channel for worse case crosstalk on multichannel devices

SWR-2755B-F Input Switcher
• 12 X 2 configuration
• Can route either of the two analyzer input channels (A & B) from any of the 12 channels
• Up to 16 units can be cascaded to allow up to 192 channels to be accessed
• XLR connectors for balanced signals or, using adapters, unbalanced signals

SWR-2755B-U Unbalanced Switcher
• 12 x 2 configuration
• Can be used as either an input or output switcher (by dip switch on rear panel)
• Up to 16 units can be cascaded to allow up to 192 channels to be accessed
• Floating BNC connectors for unbalanced signals prevent ground loops

规格要求

ELECTRICAL CHARACTERISTICS

Max Voltage Rating
200 Vpk, 160 Vrms

Max Signal Power
5 W or 200 mA

Crosstalk
Balanced 600 ohm load
–150 dB @ 20 kHz
–136 dB @ 100 kHz
Unbalanced 600 ohm load
–138 dB @ 20 kHz
–124 dB @ 100 kHz

Series Resistance
Typically <0.3 Ω per side

Shunt Capacitance
Typically <90 pF, from signal path to chassis (100 nF from BNC shell to chassis on U versions)

Reverse Termination
604 Ω, 250 mW maximum

GENERAL CHARACTERISTICS

Power Requirements
90–250 Vac, 50-60 Hz, via external dc supply module

Temperature Range
Operating 0°C to +50°C
Storage –40°C to +75°C

Humidity
80% RH to +40°C, (non-condensing)

Dimensions
16.5 x 1.75 x 10.5 inches [41.9 x 4.4 x 26.7 cm]

Weight
Approximately 9.9 Ibs [4.5 kg]

REGULATORY COMPLIANCE
• EMC complies with FCC Part 15 Subpart J (class B), 89/336/EEC, 92/31/EEC, and 93/68/EEC, EN 50081-1 (1992) Emissions Class B, EN-50082-1 (1992) Immunity.
• Safety complies with 73/23/EEC, 93/68/EEC, EN6010-1 (1903)— IEC 1010-1 (1990) + Amendment 1 (1992) + Amendment 2 (1995).
• Installation category II—Pollution Degree 2.
• External Power Supply AP part number 4540.0020 complies with IEC 60950:1991+A1+A2+A3+A4, UL 950 Third Edition E183744, CSA C22.2 No. 950.
• External Power Supply AP part number 4540.0051 complies with IEC 60950:1991, UL60950 Third Edition E199447, CSA C22.2 No. 60950, PSE J60950:1998, NOM-001-SCFI-1993.

下载

SWR-2755 Switcher User Manual

SWR-2755 Datasheet