HP 8568B, Performance Tests And Adjustments Manual, Page: 28 / 313

2. Frequency Span
Accuracy
Related Adjustments
Frequency Control Adjustments
50 MHz Voltage-Tuned Oscillator Adjustments
Specification
Span
MHz
MHz
Uncertainty
of the actual frequency
separation between two points
of span setting)
of the actual frequency
separation between two points
of span setting)
Description
Frequency Span accuracy is determined by measuring a frequency at
5% of sweep and then at 95% of sweep. These frequencies correspond
to half a division from
each
edge of the CRT.
The spans chosen are based on the architecture of the HP RF
hardware:
Span Assembly Being Swept
2 0 0
H z
100
100.1
1 MHz
1.01 MHz
20
MHz
20.1 MHz
1.5
Oscillator (low divide)
Oscillator (low divide)
Oscillator (high divide)
Oscillator (high divide)
FM Coil of Yig Oscillator
FM Coil of Yig Oscillator
Main Coil of Yig Oscillator
Main Coil of Yig Oscillator
Figure 2-3. Frequency Span Accuracy Test Setup
Performance Tests