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Operation and Reference
Discrete Frequency Sweep
Discrete sweeps consist of up to 100 linear sweeps (called segments)
combined to form a custom sweep pattern. Parameters for each sweep
segment consist of start frequency, stop frequency, sweep time, and marker
frequency. These parameters are entered by programming a standard linear
sweep and storing it into a discrete sweep segment as described in
Storing Discrete Sweep Segments.
To perform a discrete frequency sweep, the HP 3325B sequences through the segment
entries, performing the designated sweeps and skipping blank entries. The sequence is
always from segment 00 to 99. For single sweep operation, the HP 3325B sequences through
the elements each time the sweep is reset and started with the [Reset/Start] key. For
continuous sweeps, the HP 3325B sequences through the segments repeatedly.
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Clearing All Discrete Sweep Elements
Cif Discrete
[Clr Discrete] (clear discrete) key empties all discrete sweep segments
in nonvolatile memory. This should be done before entering new
parameters. The [Clr Discrete] key is activated by pressing the blue [Shift]
key and then the green [Instr Preset] key.
Storing Discrete Sweep Segments
Discrete sweep entries may be made whether the discrete sweep is active or not. Each sweep
segment is a linear sweep; it may be considered a frequency step if the start frequency is the
same as the stop frequency. The entries are saved in nonvolatile memory.
To store a discrete sweep segment:
Enter the start and stop frequencies, sweep time, and (optionally) the
marker frequency as you would for any linear sweep.
Press the [Store] key.
Press the [.] key in the data group.
4.
Enter a two-digit number by pressing numeric keys in the data group.
Numbers between 1 and 9 should be preceded with a 0 (zero). No units
or other terminating keystrokes are required. This number is the
entry number m the discrete sweep segment list, the order of which
determines the pattern of the discrete sweep. Segments may be saved
in any order but are always executed sequentially from 00 to 99.
Discrete sweep segment entries may also be made by down-loading the parameters from
a computer through one of the rear-panel interface connectors. In some cases, this is the
preferred method of setting up discrete sweeps; especially if more than one pattern is used
on a regular basis. See Chapter 2, Remote Operation, for more information.
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