Measurement Examples Example 9: Displaying GSM-TDMA Bursts
ML2437A/38A OM/PM PN: 10585-00001 Rev. P 7-25
4. Introducing a delay to the trigger point display
The Measurement screen currently shows the trigger point of the pulse as occurring on
the extreme left-hand side of the graph. It may be useful to show a leading edge to the
pulse thus displaying activity prior to the trigger point.
Press [System]
> [Profile] > [Delay] and using the keypad, input a delay of 4.5 ms. Press
[Enter] to accept the value.
The Measurement screen now shows activity prior to the trigger point.
5. Using the cursors
Cursors are used to define the points at which or between which power is measured. To
take a measurement at a single point, position one cursor. To take a measurement
between two points, use both cursors. They are depicted as vertical dashed lines. The
active cursor is depicted in two ways:
• by a triangular end cap on the end of the dotted line.
• by a hyphen against the cursor number in the display readout box (see
Components of the Profiling Screen).
By positioning the cursors, the display readout box will show the average power
measured between the two cursors.
Position the cursors approximately 10 % inside the start and finish of the pulse. This
will help to stabilize the reading.
When Profile mode is first used, both cursors sit at the extreme right hand side of the
display. To move a cursor, press [System]
> [Control].
To move the active cursor, press [<<] or [>>]. To activate the other cursor, press
[SWAP].
If you wish to compare the different burst power readings, the cursors can be linked
and then moved as a pair along the waveform. To link the cursors, press [System]
>
[Control]
> [-more-] > [-more-] > [LINK CURSR].
If the cursors are now moved using [<<] or [>>], they move as a pair.
6. Displaying the Readout box
This box can be toggled on and off by pressing [System]
> [Control] > [-more-] >
[READOUT].
7. Displaying the average power in readout mode
Figure 7-38.
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