SERVICE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MTSX RSS

4.2.1.6 TRANSMIT VCO CROSSOVER ALIGNMENT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RSS LOCATION:

 

At the SERVICE MENU, press

 

F2

 

 

F7

.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MOTOROLA Radio Service Software

 

 

 

Use UP/DOWN Arrows To Adjust Softpot.

 

 

 

 

 

 

MTSX

 

Model:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

...VCO CROSSOVER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCO CROSSOVER

 

 

 

 

 

 

 

 

 

 

 

 

Current

 

 

 

 

 

 

 

 

 

New

 

 

 

 

 

 

 

 

 

 

Frequency

 

 

 

 

 

 

 

 

Frequency

 

 

 

 

 

 

 

 

 

486.0250

 

 

 

 

 

 

 

 

486.0250

 

 

 

 

 

 

 

 

 

 

 

 

Transmitter . . . . . .Off

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

F1

F2

F3

F4

F5

 

F6

 

F7

F8

F9

F10

 

 

 

HELP

 

 

 

 

 

 

TOGGLE

 

 

PROGRAM

 

EXIT

 

 

 

 

 

 

 

 

 

 

 

PTT

 

 

VALUE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Refer to your radio service manual for the transmit VCO crossover alignment procedure. This procedure should only be performed by qualified service personnel.

Transmit deviation limit alignment is a way of correcting for deviation sensitivity versus RF frequency variations in the VCO. The transmit and receive bands are divided into frequency zones with a calibration point (value) in each zone. Compensation for each of these points must be checked and adjusted if the VCO is replaced.

PROGRAMMING PROCEDURE:

1.Press F2 at the MAIN MENU. The SERVICE MENU appears.

2.Press F2. The TRANSMITTER ALIGNMENT MENU appears.

3.Press F7. The TRANSMIT VCO CROSSOVER screen appears.

4.Press Tab to select the desired field, or press the desired function key (F1 - F10).

5.If a field is selected, press the up/down arrow keys to select choice or value.

FUNCTION KEY DESCRIPTIONS:

F1 - HELP provides useful information about the currently displayed menu, screen, or field.

F6 - TOGGLE PTT function will alternately key and dekey the radio being serviced.

F8 - PROGRAM VALUE function will program the selected value into the radio.

F10 - EXIT moves the display backward in the RSS tree, one screen or menu at a time.

New Frequency Field Definition

This is the VCO crossover softpot value for this frequency. The status bar shows the relationship between this setting and the minimum and maximum settings.

4-12

68P81074C50

 

 

Page 95
Image 95
Motorola MT2000 manual Transmit VCO Crossover Alignment RSS Location, New Frequency Field Definition