The Broadcast Tools MSRP-3 AES is a three station AES/EBU digital EAS relay/switcher following in the footsteps of the original Multi-Station Relay Panel (MSRP) designed by Broadcast Tools for the Sage ENDEC in 1996, and the Broadcast Tools ADCS-III. The MSRP-3 AES provides additional alert audio distribution and transparent audio interrupt switching for EAS encoders.Used in conjunction with the single switched AES audio interrupt relay built into the ENDEC or DASDEC, the MSRP-3 AES will provide interrupt switching for four digital audio paths. Each alert insertion can occur simultaneously on one or more station outputs, but alerts can not be overlapped. It features an internal analog to digital converter (ADC) with wordclock input that accepts balanced mono analog audio, or the ADC can be bypassed and switched to an AES digital input. Standard pinout RJ45 station audio input and output jacks make installation with Cat5 or Cat6 patch cables plug and play. Control via RS-232 serial port, TCP/UDP Ethernet port, or contact closure inputs. Includes SPST test and station relay outputs. A dedicated fourth AES output provides encoder audio for additional devices.Main Features:EAS alert insertion for up to three stations. Insertion can occur simultaneously on one or more station outputs, but alerts can not be overlappedFront panel test switches (recessed), jumper defeatable.Encoder audio input switchable between balanced analog feeding the ADC or AES digital input.Built-in 24-bit analog to digital converter (ADC) configurable via DIP switches for sample rates of 44.1 or 48kHz, or external wordclock.Multi-turn front panel level adjustment trimmer for ADC encoder audio input.Dedicated fourth AES output provides encoder audio for additional devices on a terminal block connector.Transparent signal switching via sealed mechanical relays utilizing 2-form-C bifurcatedcrossbar silver alloy contacts with gold overlay.RJ45 station audio input and output jacks simplify wiring and service.SPST status relay outputs with LED indicators.Remote control via RS-232 serial and TCP/UDP Ethernet commands or contact closure inputs.Dip-switch selectable unit ID.Removable euroblock-style screw terminal connectors for status relays and contact closure inputs.Fully RFI proofed.12 Volt DC only @ 2.5 amp. 2.1mm ID x 5.5mm OD coaxial connector, center positive. Surge protected. Universal (90 264 vac / 50/60 Hz) with IEC input plug with domestic AC cord.Up to two units may be mounted on the optional RA-1 rack shelf. Desktop and wall mounting is also possible.Specifications:Station Inputs/Outputs: Station In/Out: Balanced AES/EBU digital RJ45 audio jacks. Output levels, impedance, distortion, noise, and balancing will match that of the selected input.EAS Encoder Input:-Analog monaural input ADC Configuration: +4dBu analog input provides -20dBfs AES output. when adjusted with the front panel trimmer.-ADC Bypass Configuration: 110-ohm transformer isolated AES/EBU input.Digital Audio Sample Rates:-With AES encoder/alert input: 32khz, 44.1khz, or 48khz. Autodetected.-With internal alert audio ADC: 44.1khz, 48khz, or external wordclock (switch selectable.)Switching Method: Passive. Sealed relays utilizing 1 x 2-form-C bifurcated-crossbar silver alloy with gold overlay contacts.Logic: Flash microprocessor with non-volatile memory.Operation Control:-Front Panel: Recessed, defeatable momentary switches.-Remote: Sustained, compatible with 5 volts CMOS/TTL logic, open collector or contact closures to ground.-Serial: RS-232 1200 baud, 8, N,1. RJ-11/6P4C reversed modular cable & S9 female 9-pin D-Sub adapter supplied. 10/100 Ethernet RJ45 IPv4, TCP Server/Client, UDP Server/ClientStatus:-Front Panel: LED Indicators.-Remote: Four SPST relays. 1-amp @ 30 VDC maximumInterfacing:-Station Audio I/O: Balanced RJ45 connectors. Normally closed pass-thru audio path.-Encoder Audio Input, and remote control: Plug-in euroblock screw terminals. Mating connectors supplied.-Serial: RJ-11 jack. Reversed RJ11 modular cable/female S9 9-pin D-Sub adapter supplied. Ethernet: RJ45 jack, 10/100 base-T.Power Supply: Surge protected universal switching 12 VDC @ 2.5A desktop power supply with IEC AC inlet included. CE. (Includes domestic IEC AC power cord).Operating Environment: 32F/0C-122F/50C; 0%-95% non-condensing relative humidity; 10,000ft/3048m.Physical Dimensions: 8.50 x 7.10 x 1.576 (WDH) aluminum extrusion chassis with (4) #6-32 screw thread mounting holes for optional RA-1 rack shelfWeight: 2.0 lb.Shipping Weight: 3.0 lb.Options: RA-1 rack shelf, holds two units (1-RU), filler panel supplied.