Audio Precision Audio Switchers SWR-2755

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 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. They also may be used with any discontinued products that originally specified the SWR-2122 or SWR-122 switchers. Built with the same feature set and solid integrity of the SWR-2122, the new SWR-2755 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. LEDs indicate the on or off status of each channel. 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