R&S 4200 Series Operating Manual page 201

Interface Description
Entry in column D (direction): O = Output
Entry in column T (type):
Signal description
*OFF
+PTT
–PTT
I = Input
A = Analog D = Digital
D T Range
I D Low (external contact
against ground)
= device off
High (or open) = on
Internal pull-up 10 kΩ to
3.3 V, limited to max.
6.8 V
I D Configurable via
software
I D
Type I:
Optocoupler inputs
+PTT and –PTT
V = 12 V to 57 V
I = 2 to 13 mA
source
Type II:
+PTT, pull-up –48 V
Contact against
GND = PTT
I = –4 to –5 mA
sink
R&S standard:
–PTT, pull-up +28 V,
contact against
GND = PTT
I = 3 to 4 mA
sink
B = Bi-directional
P = Power
Contact
X5.7
X5.8
X5.9
6.5
R&S XU 4200
Remarks
Hardware input for
activating/deactivating
transceiver
module
Pull-up resistors
connected via relay
contact to internal supply
+28 V/ –48 V
Note: The PTT contact of
the radio is low if the radio
is switched off.
Note: It is not
recommended to switch
the PTT Type during the
operation. Make sure the
hardware configuration is
set according to the setup
of the radio.
6166.5368.02.01