User's Manual

VHF Headstation & In-Line Amplifiers
User Handbook
Handbook Nō.-50-127201FCC Issue No:-A
Date:-14/06/2005
Page:-
32 of 45
4.9 Controller/Monitor Board (17-006801)
4.9.1 Description
To meet the need for detailed control and status reporting of cell enhancers and other
systems installed in inaccessible locations, AFL has developed an optional RS232C
(RS232D) serial interface which may be incorporated into any of AFL’s range of cell
enhancers. The RS232 interface is designed primarily to be connected to a modem, which
can then communicate either via a fixed or a cellular telephone link with another modem at
the network control centre. As standard, the interface will control any modem that works
with the Hayes command set, although it can easily be adapted to control other equipment
if required.
The controller software has been written so that it is easily configured to meet specific
customer interface requirements. The standard software has two data formats. Firstly, a
verbose format that can be controlled from a simple terminal or terminal emulator.
Secondly, a terse data format intended to be used with front-end software running on
another computer to present a very user-friendly operator interface. If required, alternative
data formats can be provided to enable integration with existing customer front-end
software.
The RS232 interface board within the Cell Enhancer integrates all the alarm inputs from
the amplifier alarm boards, as well as from relays monitoring power supply status, door
open/closed status, I.F module status, and standby battery voltage status. Monitoring of
forward power can also be done. All this information is combined and formatted with on-
board generated data including temperature, date, time and equipment serial number.
The RS232 interface board also controls the frequencies at which the channel modules
operate. These frequencies can, via a modem, be adjusted remotely. For more details, see
the RS232 interface board handbook (17-006801HBKM).