Wavetek TETRA MS Test Operating Instructions Manual page 16

TETRA MS Test
The usage of the entry fields is explained using the following example:
Fig. 10.6: The default settings for the Burst Corner Points in the DEF.SET mask.
In the first row denoted "< t2 period", the lower and upper power limits can be
entered for the time between the left-most point (which is 50 symbol periods
before T2 begins) and the time entered in the t column. In this example, the first
part of the template spans from the left side up to 15 symbols before T2; so this
first period is 35 symbols long. There is no lower limit (indicated by the lowest
possible entry of –99 dB relative to the average power over the burst) and the
upper limit is –40 dB.
In the second row denoted "< t2 period", the power limits can be entered for the
time between the previous t entry value (–15 symbols with respect to the
beginning of T2) and the time entered in the t column of this row. In the example
above, this spans the 15 symbols before T2 starts and the upper limit is +6 dB;
this period is the power ramp-up period.
In the third row, the limits for the T2 period can be entered. If t = 0 sym is entered
for the time as in this example, this period ends at the end of T2. If the limits are
required for a shorter or longer period than just T2, the appropriate value can be
entered in the t column. Positive values denote a prolongued T2 section, negative
values can be used to shorten the period.
The "> t2 period" row can be used to enter the template limits for the ramp-down
section. In the example, the upper power limit is set to 3 dB because the mobile
station may still keep the power up for a short time; the lower limit is set to –99 dB
again to allow to reach the power-off state.
The fifth period is used for the power-off state. This period does not have its own
entry values; the period takes from the time entered in the last t field until the end
of the display. The power limits are taken from the very first row where the mobile
station is expected to be in the same power-off state.
"
In order to get back to the values pre-programmed by Wavetek, press
(default corner points). The factory settings are then restored, see figure 10.6.
10-16
Parameters
{DEF.CP}