AP | SWR-2755 音频测试开关|AudioPrecision|音频开关
厂商名称： AP |AudioPrecision
Audio Precision offers three models of the SWR-2755 audio switchers, which expand the 2-channel input and output capabilities of Audio Precision 2700 series and ATS-2 audio analyzers, as well as older System One and System Two instruments.
SWR-2755 switchers replace the current SWR-2122 switchers, which have been discontinued. The new switchers are entirely compatible with our current products and offer better performance at a lower price.
Built with the same feature set and solid integrity of the SWR-2122, the new SWR-2722 series bring significantly lower crosstalk (18 dB better in an unbalanced 600 Ω load; 10 dB better in a balanced 600 Ω load), a new universal power supply that automatically adjusts to all line voltages, a convenient rear-panel ground lug and full EMC and safety regulatory compliance. Manufacturing economies enable us to offer the new switchers at a significantly lower price.
Key features
* Input and output configurations enable switching of generator outputs or analyzer inputs, or both.
* Balanced and unbalanced configurations are available.
* Multiple switchers can be connected to an Audio Precision analyzer, expanding the system capability to as many as 192 inputs and outputs.
* Low inter-channel crosstalk, less than –150 dB at 20 kHz in the balanced configurations.
* All switchers are one rack unit (RU) high (1.75"). switchers can be used on the bench or rack mounted with an optional rack mount adapter kit.
Specs
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 ohm 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 ohm, 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.
Options
SWR-2755M 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-2755F 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-2755U 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
