R&S M3SR 4100 Series, Operating Manual

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M3SR Series 4100 Initiating a GPS Information Request (Pull, Immediately, as Controller Feature)
5.26 Operating Manual 6175.4760.02 – 01
5.2.2.7 Initiating a GPS Information Request (Pull, Immediately, as Controller Feature)
By means of softkey 'Immediate PULL' the operator of a controller radio can immediately re-
quest (pull) the GPS position from a single participant operating in the same network.
Immediate GPS pull requests and responses are transmitted non-scheduled. Hence, there
is some potential that any unscheduled transmissions will conflict on-air with another (sched-
uled or unscheduled) GPS transmission and hence cannot be received by other GPS partic-
ipants.
In order to avoid collisions caused by multiple providers responding immediately, an imme-
diate pull request can only be addressed to a single (P2P) participant. The selection process
of the addressed participant is described in sect. 5.2.1.3 Addressing of GPS Transmissions.
On the other hand, immediate pull actions can be executed even if the GPS time signal (re-
quired for scheduling) has never been received yet. Also, immediate pull actions are execut-
ed without any scheduling delay. Thus, the addressed participant will also respond
immediately (if receiving the request).
Thus, immediate pull actions should be used in situations when a delay in requesting the
GPS data cannot be accepted or in case the GPS signal has never been received yet (by the
controller or by the addressed participant).
The reception of the immediate GPS pull response from the addressed provider is described
in sect. 5.2.2.10 List of Received GPS Position Information.
Softkey Type Description
Listbox 1. Press softkey ‘Immediate PULL’.
2. Select targeted single participant (PTCP)
from the list box.
3. Press ‘ENT’ to confirm selection and trans-
mit and immediate pull request to the ad-
dressed participant.
After the request is sent, the ‘Immediate PULL’
button is enabled again.