Table 2-2. Adjustable Components (3 of 3)

Reference

 

Adjustment

Adjustment

Description

Designator

 

Name

Number

 

A15R561 C

A L A M P T D

11

Adjusts amplitude of the 300 MHz calibrator signal

 

 

 

 

to -10.0 dBm.

A15R926 E

X T B I A S Z E R O

14

Adjusts zero bias point of external mixer bias.

A17R4

Z GAIN

2

Adjusts maximum intensity.

A17Rll

CUTOFF

2

Adjusts intensity to turn off blanked lines.

A17R21

Z

FOCUS

2

Adjusts focus for lines of different brightness.

A17R26

X

FOCUS

2

Adjusts focus at the left and right corners of the display

A17R34

COARSE FOCUS

2

Adjusts focus at the center of the display.

A17R55

X

GAIN

2

Adjusts the horizontal-deflection amplifier gain.

A17R57

X POSN

2

Adjusts the CRT horizontal position.

Al7R75

Y

GAIN

2

Adjusts the vertical-deflection amplifier gain.

A17R77

Y POSN

2

Adjusts the CRT vertical position.

A17R90

TRACE ALIGN

2

Adjusts the display axis rotation.

A17R92

DDD

2

Adjusts focus of the center of the display.

417R93

ASTIG

2

Adjusts for the spot roundness on the CRT display.

 

 

 

 

 

 

 

Table 2-3. Factory Selected Components

 

 

 

Reference

Adjustment

Basis of Selection

Designator

Number

 

 

 

 

A5C204

3

Selected to optimize center frequency of LC tank that loads the crystal.

A5C216

3

Selected to optimize center frequency of LC tank that loads the crystal.

A5C326

3

Selected to optimize LC pole center frequency.

A5C327

3

Selected to, optimize LC pole center frequency.

A5C505

3

Selected to optimize center frequency of LC tank that loads the crystal.

A5C516

3

Selected to optimize center frequency of LC tank that loads the crystal.

A5C717

3

Selected to optimize LC pole center frequency.

A5C718

3

Selected to optimize LC pole center frequency.

A15U802

16

Selected to set the gain of the second IF to 12 dB.

 

 

 

2-6 Adjustment Procedures