P.4
Incidentally. . .
Because of stray inductance and capacitance, it is possible for the meter to show a “quasi” reson
ant frequency. If the measured “resonant” frequency is different from what you expected, inspect
your system for these possible issues, in addition to those mentioned previously.
◆
Using the Graph Mode to Display SWR vs. Frequency
There are two types of Graph mode on this meter. You may use a predetermined center frequency and
bandwidth to perform an SWR sweep, and alternately you may set an arbitrary center frequency and bandwidth
to perform a manual SWRsweep.
Auto Sweep Mode
(“SWR” caption around center of Graph shown in Red
）
1
．
While in the Normal display mode, press the SWEEP/CENTER button to initiate
an automatic sweep. The center frequency and sweep bandwidth will be based on
the Band that is currently selected.
2
．
While the Sweep is in progress, the “SWR” caption will blink. A band Sweep
typically takes about 25 seconds to complete.
3
．
Once the Sweep is completed, you may repeat the Sweep as many times as
desired by just pressing the SWEEP/CENTERbutton again.
4
．
To return to the Normal Mode, press the GRAPH ON/OFF button. Note that the
FREQ and BAND knobs are disabled in the Sweep Mode.
Manual Plot Mode
(“SWR” caption around center of Graph shown in Green)
1
．
While in the Normal display mode, press the GRAPH ON/OFF button to enter
the Manual Plot mode. A green “SWR” box will appear.
2
． The SWR Graph will now be displayed; use the BAND and FREQ knobs to set the
desired center frequency for the manual SWRSweep.
3
． Press the SWEEP/CENTER button.
The center frequency (rounded to three digits) will appear in the center of the
Graph, and the Sweep Limits (left and right at bottom) will blink.
4
．
Use the BAND and/or FREQ knobs to set the Sweep bandwidth, then press the
A.P.OFF button to confirm the setting.
・
Because the BAND knob causes huge frequency shift, generally you will use the FREQ
knob to set Sweep Limits.
5
．
After the setup is finalized, rotate the FREQ knob to perform the Manual Sweep. Gradual rotation of the FREQ knob
allows precision measuring to be performed (minimum resolution 1 kHz).
6
．
If you press the AP-OFF button during a Manual Sweep, the color of the plot will
change (Red -> Blue -> Green -> Purple -> Orange -> Red. . .).
7
．
If you want to change the bandwidth in this mode, press the SWEEEP/CENTER button
again.
8
．
To return to the Normal mode, press the GRAPH ON/OFFbutton.
Note: You can not preserve the Graph data if you change Graph Modes
Auto Sweep Mode
Manual Plot Mode
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