Appendix A
Specifications for SCXI-1191
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 V
rms
or DC
Maximum switching voltage
AC....................................................30 V
rms
DC....................................................30 VDC
Maximum switching capacity per channel
DC....................................................30 VDC at 0.33 ADC
AC....................................................30 V
rms
at 0.33 A
rms
Maximum switching
power per channel...................................10 W
Contact on resistance (initial) .................200 m
Ω
max
Contact material......................................Gold
RF Performance Characteristics
Characteristic impedance (Z
0
) ................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