7.Input Attenuator Switching Uncertainty Test

6.Press MARKER CPEAK SEARCH),(KJ

7.Set [~~J’JREFERENCE LEVEL], and frequency synthesizer

amplitude according to Table 2-l 1. At each setting, press MARKER (PEAK SEARCH) and record the deviation from the 10 dB setting from the MARKER A amplitude readout (see Figure 2-10). The deviation should not exceed *l.O dB at any setting.

HKR A 0 Hz

~Sl”‘ir’ -40. i dBm l ATTi” 20 ,dB IB,

,

,

,

i

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CENTER 28.0000

MHz

 

 

 

SPAN

100. 0

ktiz

 

RES

BY

30 kHz

VBW

100 Hz

SVP 500

n3mP.z

 

 

Figure 2-10. Attenuator Switching Uncertainty Measure]nent

 

‘Ihble 2-l 1. Input Attenuator Switching Uncertainty

 

 

 

 

 

 

 

 

 

 

 

 

Lz)

 

 

 

Frequency

 

 

Deviation

Corrected

 

Allowable

[R E F E R E N C E L E V E L )

 

 

 

 

 

 

Wm)

 

 

Synthesizer

(MARKER A

Deviation

Deviation

 

 

 

 

 

Amplitude

 

Amplitude

WV

 

 

(9

 

 

 

 

 

Wm)

 

 

(W

 

 

 

 

10

-50

 

-52

 

 

0 (ref)

0 (ref)

 

 

20

-40

 

-42

 

 

 

 

 

 

fl dB

30

-30

 

-32

 

 

 

 

 

 

fl dB

40

-20

 

-22

 

 

 

 

 

 

fl dB

50

- 1 0

 

- 1 2

 

 

 

 

 

 

fl dB

60

0

 

 

 

-2

 

 

 

 

 

 

fl dB

70

+lO

 

 

 

8

 

 

 

 

 

 

fl dB

 

 

 

 

 

 

 

 

 

 

 

 

 

Performance Tests 2 - 21