SWR-2755
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SWR-2755 Series Audio Switchers § Expand analyzer and generator capability up to 192 inputs and outputs. § Balanced (XLR) and Unbalanced (BNC) connector versions available. § Crosstalk < –150 dB @ 20 kHz, balanced. The SWR-2755 family of programmable switchers are ceptional crosstalk performance, less than –150 dB at accessory units for most of Audio Precision’s audio ana- 20 kHz in balanced operation. lyzers, including the 2700 series, ATS-2, System One, SysThe switchers are controlled by our proprietary APIB tem Two, System Two Cascade and Cascade Plus interface, and the switcher operation is integrated into Auinstruments. dio Precision’s AP2700, ATS, APWIN and S1.exe control When used without a switcher, these instruments can software. Channel-in-use LEDs next to each connector inprovide two analog outputs and two analog inputs. A pro- dicate crosspoint activity. grammable switcher such as the SWR-2755 can be used to There are three versions of SWR-2755 switchers that expand the two-channel input and output to interface to differ from one another in connector configuration. These multi-channel devices or production “bed-of-nails” test are: fixtures. SWR-2755M, front panel fitted with 12 XLR SWR-2755 switchers use highly reliable electromemale connectors and 2 XLR female connectors, chanical relays to best preserve the signal integrity of the typically used as an output switcher; generator and signals from the device under test (DUT) for transparent operation. Unlike conventional industrial au SWR-2755F, front panel fitted with 12 XLR dio signal routing switchers, the SWR-2755 achieves exfemale connectors and 2 XLR male connectors, typically used as an input

SWR-2755U, front panel fitted with 14 BNC connectors. The “U” or “unbalanced” switchers can appear to the control software as either an input or an output switcher, according to the position of a rear-panel switch. connector shells. Up to 16 switchers of any configuration can be used in a system, enabling testing of DUTs with a total of up to 192 inputs and/or outputs (up to 96 stereo pairs). Additional switchers are “daisy-chained” on the APIB bus. Configuration switches on the SWR-2755 rear panel enable setting the APIB address of each switcher to the desired channel number selections:...

Maximum relay contact rating is 30 Watts or 1 Amp. For best reliability, limit switched power to 5 Watts or less. Manufactured in Beaverton, Oregon, USA APIB ADDRESS APIB INTERFACE APIB INTERFACE SWR-2755F Input Switcher—The SWR-2755F front panel is fitted with 12 XLR female connectors and 2 XLR male connectors. SWR-2755F switchers are configured as input switchers. REAR PANEL CONNECTORS Each input switcher module connects any of 12 channels to the two analyzer input channels (A & B). Maximum relay contact rating is 30 Watts or 1 Amp. For best reliability, limit switched power to 5 Watts or...

Specifications (all models) Electrical Characteristics Max Voltage Rating Max Signal Power1 Crosstalk2 Balanced 600 W load (F and M versions only) Unbalanced 600 W load (all versions) Series Resistance Shunt Capacitance Reverse Termination (M version only) –150 dB @ 20 kHz. –136 dB @ 100 kHz. –138 dB @ 20 kHz. –124 dB @ 100 kHz. Typically <0.3 W per side. Typically <90 pF from signal path to chassis (100 nF from BNC shell to chassis on U versions). 604 W, 250 mW maximum. 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...