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Marker Operation
The synthesizer has five frequency markers that can be used as fixed
frequency “landmarks,” or as variable frequency pointers on a CRT
display. To view the marker features of the synthesizer on a CRT,
connect the synthesizer as shown in Figure 1-8.
Refer to menu map 2, FREQUENCY.
Press
[PRESET).
Press (START)
@
@&).
Press (STOP)
0
[GHz).
Press
[MARKER).
Select Marker Ml and enter
@
(GHz.
The synthesizer is sweeping from 3 to 7 GHz, with a 100 ms sweep
speed. A frequency marker is set at 4 GHz, which causes an
intensified dot to appear on the CRT. To obtain an amplitude spike
at that frequency, select
Amp1
Markers . Notice that you can set the
amplitude of the spike with the rotary knob or entry keys. To return
to the intensified dot representation, select
Amp1
Markers (asterisk
off).
Caution
Amplitude markers increase the output power at the marker
frequency. Provide protection to devices that could be damaged.
For a second marker, select Marker
M2
and enter
@
0
@
(GHz).
This process can be continued for all five markers. Note that the
marker displayed in the active entry area is “active” and can be
controlled by the rotary knob, arrow keys, and numeric entry keys.
Once the Ml and
M2
markers are established, the marker sweep
function,
softkey
MI--M2
Sweep, temporarily changes the original
start/stop frequencies to those of markers Ml and
M2.
Select
Ml--M2
Sweep.
Notice that the synthesizer now is sweeping from
4 to 5.5 GHz. Use this function to focus in on a selected portion
of the frequency sweep. Select
Ml--M2
Sweep again. This turns
the function off and returns the synthesizer to its original sweep
parameters. To change the start/stop frequencies for the synthesizer,
not just temporarily, use the
softkey
Start-Ml
Stop'M2
.
As an example of the delta marker function:
Select Marker
M3
and enter
@
0
0
IGHz).
Select Delta Marker.
The frequency difference between marker 3 and marker 1 is displayed,
and the CRT trace is intensified between the two markers. The active
entry area displays:
-->
DELTA MKR
(3-l)
: 2700.000000 MHz
1-14 Getting Started Basic