Honeywell PRIMUS 1000 - Code Line Select Key; Transponder Code Storage (STO) Button

PRIMUSr 1000 Integrated Avionics System
A28--1146--112--00
C--21
PRIMUS
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II Radio System
RMU ATC/TCAS Controls
Figure C--13
The line select key opposite theATC legendplaces thecursor over the
transponder code to be changed. The large outer tuning knob controls
the left two digits; the smaller inner knob controls the two right digits.
D Line Select Keys -- The first push of a line select key moves the
yellow cursor to surround the data line associated with that line
select key. This electronically connects that data field to the TUNE
knobs so that the ATC/TCAS mode or transponder code can be
changed.
D Code Line Select Key --Push this key toplaceacursor aroundthe
four--digit transponder code. The code can be changed using the
large outer TUNE knob to controlthe left two digits,and the smaller
inner TUNE knob to control the right two digits. The code line select
key can also be used to retrieve a transponder code that has been
stored in memory.
D Transponder Code Storage (STO) Button -- A selected
transponder code can be stored in memory by pushing the STO
button while the cursor is on the transponder code. To retrieve the
code from memory, push and hold the codeline select key forthree
seconds.