Bird Technologies AT-800-Manual - Manual (Page 40)

Bird AT-800 Antenna Tester
22
Auto Scale vs. Manual Scale
In swept mode Auto Scaling sets the measurement
unit scale to make the trace easier to read. However,
for quick comparisons of the size or shape of traces, it
might be more meaningful to set a standard scale.
Note: It is possible to set the scale manually
so the information is not on the display at all.
Figure 7 Auto Scaling Swept Frequency Mode
Figure 8 Manual Scaling Swept Frequency Mode
In single frequency mode Auto Scaling sets the scale so
the pointer is midrange of the previous reading. The
maximum and minimum scale values are approxi-
mately 10% higher or lower than the measured value.
This setting is an operator preference based on the
mode that best presents the desired information.
AMPS
TxRx
Mobile
Meas
Match Field
Str Util Test
VSWR
1.5
1.2
824.01 MHz 893.97
*
1.35
858.27 MHz
AMPS
TxRx
Mobile
Meas
Match
Field
Str Util Test
VSWR
2.0
1.0
824.01 MHz 893.97
*
1.35
858.27 MHz