R.V.R. Electronica PTRL, User Manual

Page: 45 / 48

PTRL & RXRL LCD
41 / 44 User Manual Rev. 1.2 - 31/01/05
11. Procedure for change frequency of the radio link
11.1 Introduction
This chapter introduces the procedures of alignment between the transmitter PTRL-
LCD and the receiver RXRL-LCD.
For the PTRL-LCD it is only necessary to program the new frequency through the Set
menù (See Cap. 5.4.4).
11.2 Frequency Alignment
In order to realize this alignment it is possible to follow the following operations:
1
a
) Connect the equipment as shown below:
2
a
) Switch on the transmitter and wait until it has locked to its operating frequency
and the LOCK light goes on. In order to control or to modify the working frequency
go to Set menu (see chap. 5.4.4).
3
a
) Adjust the variable attenuator for a value dependent from the transmitters output
power. Having the power approximately of 10W (40dBm), regulate the variable
attenuator on a value comprised between 63dB to have in input of the receiver
the -27dBm (10mV) demands. Eventually reduce the power of the transmitter
until to attain level 0.
4
a
) Check the presence of holes on the top cover and follow the instructions described
below:
1 -
In case the holes are not present on the cover:
For some models is indispensable open the cover of the receiver to can work
directly on the compensators. Unscrew the screws of the top cover with the feeding
disabled or not connected.
With the free cover, translate it laterally towards right of approximately 10 cm to
can proceed to the regulations on the front-end, that it is situated in the left side of
the machine. Reconnect the CA feeding and proceed with the operations
described in the point 5).