Table of Contents
Advertisement
Model 5344S
Operation and Programming
3-70.
Wide Band Plug-ins
3-71.
To generate wide-band frequencies, for example, .01 to 20.0 GHz, ail of the previous
techniques can be combined in one unit as shown in
Figure 3-5.
To generate frequencies below
the YTO range, it is mixed with a fixed frequency Cavity Oscillator. To generate frequencies
above the YTO range, it may be multiplied by a YTM.
CAVITY OSCILLATOR (3.8 GHz)
Figure 3-5. Wide Band Plug-in
3-72.
Further investigation of the particular plug-in in use is suggested to help realize the full
potential of the 5344S. Keep in mind the relationship between the RF OUT and the AUX OUT.
3-73.
Subharmonic Locking and Frequency Offset Locking utilize these functions to expand the
5344S's capabilities.
3-74.
Detailed Description of Subharmonic Locking Mode
3-75.
Subharmonic mode provides a way to control sweeper plug-ins without having to place a
power splitter or directional coupler in the signal path, which lowers the total available power
and reduces flatness of the frequency response. Subharmonic Locking Mode also provides a way
to control sweeper plug-ins that can generate frequencies beyond the 5344S's range.
3-76.
In Subharmonic Locking Mode, instead of counting the front panel sweeper RF OUT to
determine the necessary correction voltage, the 5344S counts the rear panel AUX OUT (YIG
output). This AUX OUT is directly related to the front panel RF OUT, being either a subharmonic
or offset by a specific value. This allows the front panel RF OUT to be used at its full power
capabilities. Subharmonic Locking Mode cannot be used if the YIG output signal is not available
before any multiplication, heterodyning, or modulation.
3-9
Advertisement
Table of Contents
