If desired, you can set the frequency boundaries of the sweep using a center
frequency and frequency span. These parameters are similar to the start
frequency and stop frequency (see the previous page) and are included to
give you added flexibility.
81160A: Center frequency: 1 µHz to 500 MHz. The default is 550 Hz.
81150A: Frequency span: 0 Hz to 240 MHz. The default is 900 Hz.
81160A: Frequency span: 0 Hz to 500 MHz. The default is 900 Hz.
To sweep up in frequency, set a positive frequency span.
To sweep down in frequency, set a negative frequency span.
For sweeps with Marker Off, the Strobe Out signal is a square
waveform with a 50% duty cycle. The Strobe Out signal is a TTL
“high” at the beginning of the sweep and goes “low” at the midpoint
of the sweep. The frequency of the Strobe Out waveform is equal to
the specified sweep time. The signal is output from the front-panel
Strobe Out connector.
For sweeps with Marker On, the Strobe Out signal is a TTL “high” at
the beginning of the sweep and goes “low” at the marker frequency.
The signal is output from the front-panel Strobe Out connector.
Voltage level at Strobe Out can be configured at TTL, ECL or 2V levels.
Start and Stop Frequency are limited by the output function and amplifier
type.
Center Frequency and Frequency Span are limited by the output function
and amplifier range.
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