User Guide

PAMS
Technical Documentation
NSE–8/9
System Module
Page 2– 87
Issue 1 07/99
7. RXI RX, Analogue IQ sig-
nal
Analogue 13MHz RX signal from SUMMA to
12bit ADC in COBBA.
8. AFC Automatic Frequency
Control
Fine adjusts to 13MHz clock from Base Station.
11 bit DC–voltage (0 to 2.346 Volt)
9. VTX Voltage TX/RX Controls the switch between PCN TX and PCN
RX. Analogue signal (0 or 3 Volt)
10. FraCrl Front end Amplifier
Control
Turns the LNA on and off (30dB difference).
11. BandSel Band Select Selects between GSM and PCN band inside the
CRFU3. Turns the correct LNA’s and Mixers on
and off inside the CRFU3.
12. RXC RX control Analogue control voltage between 0.12 and 2.33
volt (10bit) for the Automatic Gain Control Am-
plifier.
TX:
Figure 26. Transmitter Interface