User's Manual Part 3

105

The calibration procedure of the module requires a complete structure of display board (see MTG0079)

and extension module (see MTG0095) in order to perform the software selection which will be referred

to later and power the module itself..

- Menu of the Multistandard UHF Local Oscillator Module

Verification of the local oscillator section  connect a spectrum analyser to the monitor of the J4 module

and check the sections therein:

q Configure the module with Output Enabled, LineOffset Zero, Ref Internal and Channel on the

desired channel, and calibrate C1(C2 and C3) to lock the carrier to the LO frequency of the standard and

channel set (to change the standard refer to the standard changing procedure) and obtain a locking

voltage between 2V and 3V on TP1, checking that VCO is on Lock in the display menu.

Verification of the external reference section  connect a spectrum analyser to the monitor of the J4

module and check the sections therein:

q Configure the module with Ref Internal and check that it is possible to find adjust the synthesised frequency

by acting on Tune.

- Description of the adjustment points

COMPONENT DESCRIPTION

C1, C2, C3

Tuning of the local oscillator (SCH0292 - 0309 - 0310)

LO input

J5, J8

RF link (absent in case of LO configuration)

LO monitor (panel)

JP1

Unused

Testpoint for the debug of the PLL