APPENDIX B - SPECIFICATIONS
SYSTEM CONTROL INTERFACE MODULE (MRX-SCI) Data Transmission System ................................RS-232 & RS-422
Serial Port Baud Rate ........................................Up to 57.6 Kb baud
Control Levels ....................................................Four or eight
Communication Line ..........................................Coaxial, up to 2000 feet
Control Panels ................................................... Up to 64 on 2 Comm. Lines
Number of Salvos .............................................. Four, from Master Control Panel
Protocol .............................................................Simple ASCII, supports Xon/Xoff
External Sync Reference ...................................Composite Sync or Blackburst
Connectors ........................................................(2) BNC for Comm. Line & External Sync.
..........................................................................9 Pin “D” for Serial Port
Input Impedance................................................75Ω, terminated
Input Level .........................................................1.4V p-p maximum
Input Coupling....................................................DC
Input Return Loss ..............................................35dB minimum to 5MHz
Input DC Offset ..................................................±0.3V
Tilt, field and line ................................................<1% maximum
Output Impedance .............................................75Ω, source terminated
Output Level ...................................................... 1.4V p-p maximum
Output Coupling.................................................DC
Differential Phase.............................................. <0.15° @ 4.43MHz, 10-90% APL
Differential Gain .................................................<0.15% @ 4.43MHz %, 10-90% APL
Frequency Response.........................................±0.1dB from DC to 25 MHz
Bandwidth..........................................................50 MHz
Input Gain Variation ...........................................<±0.15 dB maximum
Crosstalk ..........................................................>40 dB below 1V p-p @ 5 MHz
Hum & Noise......................................................-65 dB rms., below 1Vp-p
Connectors ........................................................BNC
ANALOG AUDIO FRAME (MRX-24A, MRX-32A) Input Impedance ................................................30 KΩ, balanced
Input Level .........................................................+24 dBu, maximum
Output Level ...................................................... +24 dBu max. into 600Ω
..........................................................................+26 dBu max. into high impedance
Output Impedance .............................................100Ω, balanced
Frequency Response.........................................±0.1 dB 10 Hz to 30 KHz, any level
..........................................................................±0.25 dB to 100 KHz
Hum & Noise......................................................< -90 dBu with 22KHz low-pass filter
Total Harmonic Distortion...................................<0.05% maximum, worst case @ +24 dBu
Crosstalk............................................................90 dB min. below referenced channel 10Hz to 20kHz,
............................................................................... all inputs driven, 600Ω loads. 110 dB typ.
Gain...................................................................Unity ±0.2 dB, 600Ω termination
Connectors......................................................................3 Pin pluggable terminals