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Mode! 5344S
Operation and Programming
3-133.
DETAILED OPERATING MODES
3-134.
Figures 3-8 through 3-76 detail the four modes of operation in Manual Lock and in Auto
Lock mode. These figures include all required interconnections and operating procedures. This
assumes the 5344A and 5342A/43A have been connected per paragraph 2-19. These examples use
the HP 8350A Sweep Oscillator and an 83592A (.01 to 20.0 GHz). Change the parameters of the
examples to fit your sweeper's frequency range.
3-135.
The signal level at the input of the counter should be as specified in Table 1-1,
Specifications. Power splitters and directional couplers attenuate the signal level, so be sure there
is sufficient signal for the counter input. When placing an attenuating device in series with the
signal would cause the level to drop below the required level, a feature called Subharmonic
Locking is provided. This allows the signal source's output to be used without any attenuating
devices. Figure 3-17 details the Subharmonic Locking and Figure 3-18 details the Frequency
Offset Locking mode.
3-136.
Common Control Problems
3-137.
Most sweep oscillators have controls and functions that, if inadvertently turned-on, may
cause problems when the 5344S tries to lock. For instance, if the square-wave modulation is on,
the 5344S will not be able to follow the signal and lock will not be achieved. The following Table
lists some of the common controls that may create problems.
_
Table 3-10. Common Control Problems
1. Square-wave modulation turned-on or the signal being applied to the counter is being
modulated in some form.
2. Sweeper's Amplitude Markers are turned-on.
3. CW filter is on.
4. RF Blanking is on during LOCK/ROLL.
3-30
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