PUMA T2
Technical Handbook
Technical description
P/N: 779-0306/01
Revision 03
OTE Proprietary information
Page 41
Interface signals description:
ITX, QTX: Components, in phase and in quadrature, of the up-link analogue signal
in base band, modulated π/4 DQPSK.
Electrical characteristics: 2.4 Vpp with 1.5 Vdc level (as in output from Dual DAC of
CMX980)
IRX, QRX: Components in phase and in quadrature of the downlink analogue
signal in base band, modulated π/4 DQPSK.
Electrical characteristics: 2.4 Vpp with 1.65 Vdc current level (compatible with ADC
input of Front End CMX980)
IF, QF: Components, in phase and in quadrature, of the up-link analogue signal in
base band, for procedure of the carrier-suppression.
Electrical characteristics: 2.4 Vpp AC, with 1.65 Vdc level (compatible with ADC
input of Front End CMX980)
RX-GATE: Downlink analogue chain activation control; open collector type signal.
Coding: RX_ON = GND/Floating == > downlink chain active/inactive.
ON/OFF: Digital signal to command on and off the terminal. When the button is
pushed it determines the ON, OFF states commutation
Coding: GND/Floating == > Change the state of ON/OFF/the state not change.
MANT-AL: TTL digital signal, for power supply maintenance control.
Coding: MANT-AL = 0/1 == > Disconnect power supply/maintain power supply.
SD: TTL digital signal controls the removal of power supply to the RF circuits on
the RT board. This control does not turn off the power supply to the base band
board.
Coding: SD = 0/1 == > On/Off.
PRES-AL: Indication of power supply present at the terminal external connector.
It shows the power supply status at the FLEX connector.
Coding: PRES-AL = GND/Floating ==> External power supply present/No external
power supply.
RX-ON: Downlink analogue chain activation control; open collector type signal.
Coding: RX_ON = GND/Floating == > downlink chain active/inactive.
TX-ON: Control of activation at maximum power level of RF amplifier; open
collector type signal.
Coding: TX_ON = GND/Floating == > amplifier inactive/active.
TX-GATE: Uplink analogue chain activation control; open collector type signal.
Coding: TX_GATE = GND/Floating ==> uplink chain active / inactive.
HDATASER: CMOS digital signal with serial data flow at 2304 kbit/s (also
programmable at 576 kbit/s) for programming the DACs, the synthesizer and the
EEPROM present on the RT board.
HCKSER: CMOS digital signal for clock transmission at 2304 kHz, associated with
the SERDATAOUT and SERDATAIN data lines, active on the uplink and only
present in association with:
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