R&S M3SR 4100 Series, Operating Manual

Page: 571 / 706

Operating Manual 6175.4760.02 – 01 5.25
M3SR Series 4100 Initiating a GPS Position Information Transmission (Push, Scheduled)
5.2.2.6 Initiating a GPS Position Information Transmission (Push, Scheduled)
By means of softkey 'Scheduled PUSH' the operator can transmit (push) its current GPS po-
sition to other participants using a scheduled transmission (see sect. 5.2.1.2 Types of GPS
Transmission).
If a GPS participant has currently only limited or no GPS satellite visibility, it will push empty
GPS positioning information to the network. However, standard push actions can be only ex-
ecuted after the GPS time signal (required for scheduling) has been received at least once.
This is due to the fact that standard push actions are scheduled transmissions in order to
avoid potential on-air collisions.
Thus, using the standard push mode is more reliable than the immediate push (see
sect. 5.2.2.5 Initiating a GPS Position Information Transmission (Push, Immediately)). On
the other hand, in case the GPS signal has never been received yet, the operator must use
an immediate push transmission (see sect. 5.2.2.5 Initiating a GPS Position Information
Transmission (Push, Immediately)) in order to transmit an empty GPS position record (indi-
cating the missing GPS reception to other participants).
The reception of the pushed GPS position information by other GPS participants is described
in sect. 5.2.2.10 List of Received GPS Position Information.
Softkey Type Description
Activate Press softkey ‘Scheduled PUSH’.
During transmition this softkey is greyed-out.
Once running, a scheduled PUSH can not be
interrupted.
After sending the scheduled push request the
button is enabled again.