Agilent Technologies HP 8642A/B Specifikace stáhnout pdf (Strana 93)

VCO Tuning Linearity

The

HP

3048A requires that

the

VCO's tuning curve nonlinearity

not

exceed

the

limits described

in

Figure

2-11 out to ±45% of the

center

voltage defined

for the

measurement.

-45%

FREQUENCY

CHANGE

of VCO

Frequency Scale

is

dependent

on

the

tuning constant

of VCO.

-15%

fr

+

15%

J

DRIFT TRACKING RANGE

+

45%

%

Of

TUNE

VOLTAGE

Figure 2-11.

VCO

Tuning Linearity Required

for

Phase Lock Loop Measurements

where:

/n = The

frequency

of the

Beatnote

at the

Center Voltage.

and:

/i = The +

15% point

of the

Voltage Tune Range.

fi

= The

—

15% point

of the

Voltage Tune Range.

(6/i

to 1.5/i) and (6/2 1-5/2) are the

limits

for the ±

45% points

of the

Voltage Tune Range.

2-24 Instr. Params:

$N

w/PLL

1 2 ... 88 89 90 91 92 93 94 95 96 97 98 ... 452 453

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