jotron TR-910, Руководство оператора и инструкция по установке, Страница: 39 / 48

5.2 Note on frequency se ƫ ng
5 Opera ng Instruc ons
5.1 Introduc on
To con fi gure the transceiver, several parameters may be set from the front panel to tailor the unit for di ff erent
applica ons. This sec on details the parameters that are available from the unit front panel and explains the
use of each parameter.
The transceiver contains no manual adjustments or switch se ngs. All parameters can therefore either be
set from the front panel, using an external applica on, or both.
There are 4 access levels that can be selected to limit the user access to certain parameters.
The local user levels can be changed using a remote protocol (external
applica on) or using the
access control submenu. To be able to change the
user level from the front panel, a PIN code must be entered fi rst, the default
PIN code is 1881
When changing the value of a parameter from the front panel, the new value is stored in a non-vola le memory
when the user returns to the home screen, or automa cally within a minute when there are no user ac ons.
The user access levels are:
Table 22: User access levels
User access levels
Restricted
Limits front panel opera on to selec ng pre-set channels and adjus ng local audio
output levels and display appearance. Use this level when the radio units are used
from a remote posi on or in cases where the user should be restricted to use pre-set
channels only (1 to 100).
Operator
The same func onality as restricted, but in addi on the local user has full access to
the opera ng frequency (store and recall).
Technician
This level gives the local user access to the most used installa on speci fi c parameters
(line levels, output power, etc.) and should only be used when installing or
maintaining the radio units.
SysOp
This level gives unlimited access to all parameters within the radio units and should
be used by system experts when installing the radios ini ally or when the radios are
in a secured area.
5.2 Note on frequency se ng
The frequency is displayed according to the procedure described in ICAO annex 10. This is a way of se ng the
frequency in a mixed 8.33 kHz and 25 kHz environment. The frequency displayed does not always re
fl ect the
actual transmit or receive frequency but is the frequency used to orally communicate the frequency between
Doc. No.: 103614 TR-910 Operator Rev. AB
jotron.com
39