Maintenance Guide Part 1

NeTIS MAINTENANCE GUIDE – Version 1.1 16/139

Location for board communications (option) or a COM4 board for network mode

connection to a switch using a V11 or G703 link, or a COM S board for connection to

a PABX in autonomous mode.

Location for an optional DCTR board for a second diversity reception channel.

DCTR operation indicators

14a ALIM Normally on

14b ACT Flashes once per second as soon as the software is running correctly

14c MFR Flashes at high speed (perceivable by the lessening of the

brightness of the indicator) if the board is operating correctly

14d D1 On when a high level radio signal is received

14e D2 On when a block of high power radio data is received (threshold

around -70dBm)

14f D3 Indication of the correct decoding of the TETRA block received

as input

14g PL Local oscillator slave mode indicator (normally on)

When reception frequency of the board is changing the indicator flashes

briefly.

UCM board operation indicators

15a ALIM Normally on permanently

15b 28V PA power supply: Normally on permanently

15c CTX Radio transmission indicator

15d PLL Transmission oscillator slave mode indicator: Normally on permanently

15e IO Reception of messages from the BS software indicator.

15f ALC Power slave mode operation indicator: normally permanently on

15g LINE PA linearization indicator

15h LOWPW Low power alarm: normally off

15i VSWR Too high reflected power alarm: normally off

15j TEMP PA temperature alarm: normally off

'11111' transmission command - this push button can be accessed using a sharp object.

When it is activated, the TETRA modulation signal is replaced by a series of 1 symbol

which correspond to a pure radio carrier offset from the nominal frequency by +2.25

KHz - this function is used to check the frequency of a base station using an analogue

radio bench.

Radio input - level between - 20 dBm and - 130 dBm

COM2 serial connector used to connect a local network management terminal

Radio output to the PA, nominal level - 5 dBm