Appendix A Specifications for SCXI-1191
SCXI-1190/1191 User Manual A-4 www.ni.com
SCXI-1191

Input Characteristics

Number of relays per bank.....................3
Number of banks....................................4
Common-mode voltage
Channel to earth...............................30 Vrms or DC
Maximum switching voltage
AC....................................................30 Vrms
DC....................................................30 VDC
Maximum switching capacity per channel
DC....................................................30 VDC at 0.33 ADC
AC....................................................30 Vrms at 0.33 Arms
Maximum switching
power per channel...................................10 W
Contact on resistance (initial).................200 mΩ max
Contact material......................................Gold

RF Performance Characteristics

Characteristic impedance (Z0)................50 Ω
Insertion loss at:
< 2.5 GHz........................................< 0.6 dB
< 4 GHz...........................................< 0.9 dB
VSWR at:
< 2.5 GHz........................................< 1.3
< 4 GHz...........................................< 1.5
Isolation:
< 2.5 GHz........................................< –60 dB
< 4 GHz...........................................< –55 dB
Maximum RF carry power
at 900 MHz......................................10 W