6-5 ACCESSING TRUNK MODE
Select the Trunk mode by placing the cursor in the
"Mode:" field in the Display Zone located at the top
of the screen. Use the TRUNK softkey to select the
trunk mode. The "Meter:" field must be set to a
trunking test. Use the "more" softkey to access the
Trunking selections. After selecting RADIO INIT, a
screen similar to figure 6-3 appears.
Figure 6-3. Trunk Mode Screen – Radio Initiated Trunk I
6-6 RADIO INITIATED TRUNKING
The
RADIO INIT softkey configures the analyzer to
display the current data and test status for the radio
initiated trunked test sequence. When the test is
started, the analyzer will blank out decoded ISW
data from the previous test sequence and generate
idle channel signaling on the control channel. The
analyzer will wait for the operator to initiate a
transmission from the radio. When a transmission
from the radio is detected, the analyzer will execute
the test sequence defined by the parameters on the
trunking screen.
In the following subsections, the call sequence
selected is Dispatch. For details on testing Radio
Initiated Phone Interconnect and Call Alert call
sequences, refer to Section III, Applications, in this
manual.
6-6.1 Radio Initiated Dispatch Trunk I Testing
The radio receives the channel assignment and
switches to the voice channel. The analyzer sends a
high-speed data word on the voice channel transmit
and monitors the voice channel receive for a high-
speed acknowledge tone from the radio. Once the
high-speed acknowledge is detected, the trunking
analyzer transmits low-speed data on the voice
channel. When the radio detects the low-speed data
from the analyzer, it sends a connect tone and voice
on the voice channel. Once the connect tone from
the radio is measured and displayed, the analyzer
enables its modulation and unmutes its speaker. A
status thermometer in the Display zone shows the
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