Changing The F1D Transmitter / Receiver Signal Polarity - R&S M3SR 4100 Series Operating Manual

M3SR Series 4100
3.7.2.29

Changing the F1D Transmitter / Receiver Signal Polarity

Softkey
The standard assignment of data polarity to frequency is according to STANAG 4204:
Data level polarity
0
1
3.166
Changing the F1D Transmitter / Receiver Signal Polarity
Softkey Type
Toggle
RS232 polarity
positive
negative
Description
1. Press relevant softkey to toggle polarity.
Possible values:
• Negative (-)
• Positive )+)
It influences the F1D data terminal signal po-
larity on X26.19 (RXD2) and X26.33 (TXD2).
Adjust the polarity if the F1D radio network is
not compliant with the default settings from the
STANAG 4204:
0 at the COM interface => lower transmit fre-
quency
1 at the COM interface => higher transmit fre-
quency
For ALE operation (option) within link
mode analog voice / FF and selected mod-
ulation mode F1D the Transmitter / Receiv-
er Signal Polarity is positive.
Frequency
Fc - fs
Fc + fs
Operating Manual 6175.4760.02 – 01