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PAMS
Technical Documentation
NSE–3
System Module
Original 11/97
Page 3 – 56
AFC function
AFC is used to lock the transceivers clock to frequency of the base sta-
tion. AFC–voltage is generated in COBBA with 11 bit AD–converter.
There is a RC–filter in AFC control line to reduce the noise from the con-
verter. Settling time requirement for the RC–network comes from signal-
ling, how often PSW ( pure sine wave ) slots occur. They are repeated af-
ter 10 frames , meaning that there is PSW in every 46 ms. AFC tracks
base station frequency continously, so transceiver has got a stable fre-
quency, because changes in VCTCXO–output don’t occur so fast ( tem-
perature ). Settling time requirement comes also from the start up–time
allowed. When transceiver is in sleep mode and ”wakes” up to receive
mode , there is only about 5 ms for the AFC–voltage to settle. When the
first burst comes in system clock has to be settled into +/– 0.1 ppm fre-
quency accuracy. The VCTCXO–module requires also 5 ms to settle into
final frequency. Amplitude rises into full swing in 1 ... 2 ms, but frequency
settling time is higher so this oscillator must be powered up early enough.
Receiver blocks
RX interstage filter
Parameter
Min.
Typ.
Max.
Unit
Passband
935 – 960
MHz
Insertion loss
3.8
dB
Maximum drive level
+10
dBm
1st mixer in CRFU_1a
Parameter
Min.
Typ./
Nom.
Max.
Unit/Notes
Supply voltage
2.7
2.8
2.85
V
RX frequency range
935
960
MHz
LO frequency range
1006
1031
MHz
IF frequency
71
MHz
Output resistance (balanced)
10 k
ohm
1st IF–filter
Parameter
min.
typ.
max.
unit
Operating temperature range
–20
+75
deg.C
Center frequency , fo
71
MHz
Maximum ins. loss at 1dBBW
11
dB
Содержание NSE-3 SERIES
Страница 3: ...NSE 3 SeriesTransceivers PAMS Technical Documentation Original 11 97 Chapter 1 Foreword ...
Страница 7: ...NSE 3 Series Transceivers PAMS Technical Documentation Original 11 97 Chapter 3 System Module ...
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Страница 80: ...PAMS Technical Documentation Original 11 97 Chapter 4 UI Module UE4 ...
Страница 83: ...PAMS Technical Documentation UI Module UE4 Page 4 4 Original 11 97 Baseband Block Diagram ...
Страница 95: ...PAMS Technical Documentation UI Module UE4 Page 4 16 Original 11 97 This page intentionally left blank ...
Страница 96: ...UIF Module UE4 Original 11 97 4 A3 1 Circuit Diagram of UIF Module Version 8 Edit 44 for layout version 10 ...
Страница 98: ...UIF Module UE4 Original 11 97 4 A3 3 Circuit Diagram of Keyboard Version 8 Edit 38 for layout version 10 ...
Страница 99: ...UIF Module UE4 Original 11 97 4 A3 4 Layout Diagram of UE4 Version 10 ...
Страница 100: ...PAMS Technical Documentation Original 08 96 Appendix 1 TRANSCEIVER NSE 3NX ...
Страница 104: ...NSE 3 Series Transceivers PAMS Technical Documentation Original 11 97 Disassembly Troubleshooting Instructions ...
Страница 139: ...PAMS Technical Documentation Original 11 97 HFU 2 ...
Страница 146: ...PAMS Technical Documentation HFU 2 Page 8 Original 11 97 Exploded View of HFU 2 3 2 4 5 1 ...
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Страница 154: ...PAMS Technical Documentation Original 11 97 CARK 64 Installation Guide ...
Страница 158: ...PAMS Technical Documentation CARK 64 Page 5 Original 11 97 This page intentionally left blank ...
Страница 159: ...PAMS Technical Documentation Original 11 97 CARK 91 Installation Guide ...
Страница 167: ...PAMS Technical Documentation CARK 91 Page 9 Original 11 97 This page intentionally left blank ...
Страница 168: ...NSE K B 3 Series Transceivers PAMS Technical Documentation Original 11 97 Service Tools ...
Страница 192: ...PAMS Technical Documentation NSE K B 3 Service Tools Page 25 Original 11 97 This page intentionally left blank ...
Страница 193: ...NSE 3 System Module UP8T Original 11 97 3 A3 1 Block Diagram of System RF Blocks ...
Страница 194: ...NSE 3 System Module UP8T Original 11 97 3 A3 2 Circuit Diagram of Baseband Version 12 Edit 8 for layout version 14 ...
Страница 195: ...NSE 3 System Module UP8T Original 11 97 3 A3 3 Circuit Diagram of Power Supply Version 14 Edit 41 for layout version 14 ...
Страница 198: ...NSE 3 System Module UP8T Original 11 97 3 A3 6 Circuit Diagram of Audio Version 14 Edit 27 for layout version 14 ...
Страница 199: ...NSE 3 System Module UP8T Original 11 97 3 A3 7 Circuit Diagram of IR Module Version 14 Edit 21 for layout version 14 ...
Страница 200: ...NSE 3 System Module UP8T Original 11 97 3 A3 8 Circuit Diagram of RF Block Version 14 Edit 26 for layout version 14 ...
Страница 203: ...NSE 3 Series Transceivers PAMS Technical Documentation Original 11 97 Tuning Instructions ...
Страница 217: ...PAMS Technical Documentation NSE 3 Tuning Instructions Page 15 Original 11 97 This page intentionally left blank ...