HP 8568B 2.Frequency Span Accuracy lkst, Description, Specification, Related Adjustments

2.Frequency Span Accuracy lkst

Related Adjustments Frequency Control Adjustments

50 MHz Voltage-Tuned Oscillator Adjustments

Specification

SpanUncertainty

>l MHz f(2% of the actual frequency separation between two points +0.5% of span setting)

51 MHz 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
2 0 0 H z	VT0	Oscillator	(low	divide)
100 kHz	VT0	Oscillator (low divide)
100.1 kHz	VT0	Oscillator	(high	divide)
1 MHz	VT0	Oscillator	(high	divide)
1.01 MHz	FM Coil of Yig Oscillator
20 MHz	FM Coil of Yig Oscillator
20.1 MHz	Main Coil of Yig Oscillator
1.5 GHz	Main Coil of Yig Oscillator

SYNTHESIZED WEEPER

Figure 2-3. Frequency Span Accuracy Test Setup

2-6 P e r f o r m a n c e T e s t s