R&S 4200 Series - Page 204

R&S XU 4200 Interface Description
6166.5368.02.01 6.8
Entry in column D (direction): O = Output I = Input B = Bi-directional
Entry in column T (type): A = Analog D = Digital P = Power
Signal description D T Range Contact Remarks
SER_CONTR_TXD_A O D X7.10
SER_CONTR_TXD_B O D X7.11
SER_CONTR_RXD_A I D X7.12
SER_CONTR_RXD_B I D
RS-422 / RS-485
Ri = 120  (a-b)
Max. ± 6.8 V
against GND
X7.13
RS-422 / RS-485 interface
to Telsa external
automatic filter only
USER_OUT O D Ri = 220 
CMOS 3.3 V
X7.14
USER_IN I D Contact against
GND = active
Internal pull-up 10 k
to 3.3 V, limited to
max. 6.8 V
X7.15 If "User Contact Warning"
is enabled and the input
USER_IN (X11.15) is
"high" (e.g. input open),
the radio will send a
USER CONTACT
WARNING 0430 to the
remote control system.
If "User Contact Warning"
is enabled and the input
USER_IN (X11.15) is
"low" (input connected to
GND), no warning will be
send to the remote control
system.
Note: If "User Contact
Warning" is disabled, no
warning will be send to the
remote control system.
RX Input X8\RX Input X8 "Radio ".doc