Bird Technologies AT-800-Manual - Manual (Page 46)

Bird AT-800 Antenna Tester
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Selecting the Sweep Type
Sweep types are continuous or single hold. Continuous
will sweep and update the trace automatically. Single
hold will sweep once and the trace will remain in the
display. Each time single hold is pressed, the trace is
updated.
1. Press the MENU key.
2. Press the MEAS MATCH key.
3. Press the SWEPT FREQ key.
4. Press the SWEEP TYPE key.
5. Depending on desired mode press either SINGLE
HOLD or CONT key.
Note: HOLD will be displayed if single
hold is selected.
Note: The tester begins sweeping if contin-
uous is selected.
Saving a Trace
The AT-800 can store up to 12 traces. A saved trace
can be used to evaluate long term antenna perfor-
mance, to compare performance under different condi-
tions or to compare to another antenna. A saved trace
is also a powerful tool in limit testing. The trace can be
uploaded to a PC using optional interface software and
the serial port. Traces are stored in nonvolatile mem-
ory so they are not lost when the Antenna Tester is
turned off.
The reflection coefficient is the data actually saved when
saving a trace, and everything else is calculated from
that. This allows flexibility when comparing traces.