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2. Frequency Span
Accuracy
lkst
Related Adjustments
Frequency Control Adjustments
50 MHz Voltage-Tuned Oscillator Adjustments
Specification
Span
>l
MHz
51 MHz
Uncertainty
f(2%
of the actual frequency
separation between two points +0.5%
of span setting)
445%
of the actual frequency
separation between two points +0.5%
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
8568B
RF
hardware:
Span
Assembly Being Swept
200 Hz
100
kHz
100.1 kHz
1 MHz
1.01 MHz
20 MHz
20.1 MHz
1.5
GHz
VT0 Oscillator (low divide)
VT0 Oscillator (low divide)
VT0 Oscillator (high divide)
VT0 Oscillator (high divide)
FM Coil of Yig Oscillator
FM Coil of Yig Oscillator
Main Coil of Yig Oscillator
Main Coil of Yig Oscillator
SYNTHESIZED WEEPER
Figure 2-3. Frequency Span Accuracy Test Setup
2-6
Performance Tests