Agilent Technologies HP 8566B Specifikace stáhnout pdf (Strana 113)

22. Frequency Reference Error Test

ElECTRONiC COUNTER

FREQUENCY

STANDARD

SPECTRUM ANALYZER

Figure 2-37. Frequency Reference Test Setup

Equipment

Electronic Counter

.........................................

HP 5345A

1, 2, 5, or 10 MHz Frequency Reference with again rate

lo-lo/day

..................................................

HP 5061A

BNC Tee

....................................................

1250-0781

Procedure

1. Allow analyzer to warm up at

25’C

ambient temperature for a

period of 30 days.

2. Set controls of electronic counter as follows:

FUNCTION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FREQ A

DISPLAY POSITION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AUTO

GATE TIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

CHANNEL A Input Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

CHANNEL A

ATTEN

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xl

CHANNEL A Coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC

CHANNEL A LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . midrange

3. Connect equipment as shown in Figure 2-37.

4. Record the frequency of the analyzer time base as measured by the

counter:

Frequency: 10. MHz

Date:

Time:

Ambient Temperature:

5. Allow the analyzer to remain undisturbed for 24 hours, then note

the time base frequency again:

Frequency: 10. MHz

Date:

Time:

Ambient Temperature:

Note

If the ambient temperatures recorded in steps 4 and 5 differ by more

than

l°C,

the frequency measurements may be invalid.

6. The difference in frequency between the two measurements should

part in

log

(co.01 Hz at 10 MHz).

2-88

Performance Tests

1 2 ... 108 109 110 111 112 113 114 115 116 117 118 ... 404 405

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