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NMT/ETACS/NTACS

Total Access Communication System; Nordic Mobile Telephone.
European analog cellular telephones.

  lna mixer if  
  LNA Down Converter IF  
  switch pll baseband  
  Switch PLL Baseband  
  pa driver mod  
  Power Amp Driver Modulator  
  Required Functions & Agilent Technologies products  

Agilent Technologies supplies:
solid state RF components in the mobile unit
solid state RF components in the base station


NMT/ETACS/NTACS Rx-LNA top
Detects and amplifiers incoming signal

handset [860-870 MHZ (NTACS), 916-949 MHz (ETACS), 3V operation, good noise figure, low current]:
Discrete Bipolar Transistors: HBFP-0420, HBFP-0405, AT-32011, AT-31011
Integrated Circuits: INA-12063, MGA-85563, MGA-87563

base station LNA (Tower Mount Amplifier, Multi Carrier LNA) [871-904 MHz (ETACS), 915-925 (NTACS), good NF]:
Discrete GaAS FETs: ATF-10136, ATF-21186
Integrated Circuits: MGA-82563, MGA-83563, MSA-1105
PIN diodes for gain set: HSMP-381x

base station radio card [871-904 MHz (ETACS), 915-925 (NTACS), good NF]:
Discrete Bipolar Transistor: HBFP-0420, HBFP-0405, AT-32011, AT-31011
Discrete GaAS FETs: ATF-21186
Integrated Circuits: MGA-82563, INA-51063


NMT/ETACS/NTACS Down Converter top

Converts output of LNA to IF frequency
handset [860-870 MHZ (NTACS), 916-949 MHz (ETACS) in, 3V operation, low current]:
Integrated Circuits: IAM-91563
Discrete Diodes: HSMS-2829
AT-415, AT-320, AT-310, AT-305 as active mixer

base station radio card [871-904 MHz (ETACS), 915-925 (NTACS) in]:
Integrated Circuits: IAM-81008
Discrete Diodes: HSMS-2829


NMT/ETACS/NTACS IF top

Low frequency amplification
handset [70-200 MHz, 3V operation, low current]:
Integrated Circuits: INA-30311

base station radio card [70-200 MHz]:
Integrated Circuits:
high gain: INA-02186, INA-10386, INA-52063, INA-51063
high gain/ma: INA-12063, INA-30311, INA-51063, INA-31063, INA-50311, MSA-0686
high Pout: MSA-1105, MSA-0886, MSA-0486, MSA-0386, INA-10386


NMT/ETACS/NTACS Switch top

T/R: These FDD systems that uses a duplexer, not a switch.

Routing: includes or excludes elements from RF path, e.g. LNA switching for large signal case or signal path routing in multi-mode phones. Routing is not generally used in these handsets.

base station [to 949 MHz, fast, low distortion]:
Discrete Diodes: HSMP-3860, HSMP-3880, HSMP-3890 PIN diodes


NMT/ETACS/NTACS PLL top

Provides stable carrier for frequency conversion and/or modulator

handset [architecture dependant, 3V operation, low current]:
Oscillator: AT-41511, AT-32033, AT-31033, HBFP-0420, HBFP-0405
Buffer Amplifier: INA-31063, MGA-85563
Prescalers: no Agilent Technologies products
Phase Comparators: no Agilent Technologies products

base station radio card [architecture dependant]:
Oscillator: AT-32033, AT-31033, HBFP-0420, HBFP-0405
Buffer Amplifier: INA-31063, MGA-86563, MGA-85563, INA-51063
Prescalers: no Agilent Technologies products
Phase Comparators: no Agilent Technologies products


NMT/ETACS/NTACS Baseband top

provides data inputs to modulator, converts output of IF into information

no Agilent Technologies products


NMT/ETACS/NTACS Tx-Power Amplifier top

amplifies outgoing signal for broadcast, sets to correct power level

handset [871-904 MHz (ETACS), 915-925 (NTACS), 3V operation, up to 1W Pout, high efficiency]:
Discrete Transistor line-up: AT-38043, AT-33225
Detector diodes for power control: HSMS-28xx

base station radio card [860-870 MHZ (NTACS), 916-949 MHz (ETACS), 10 mw - 1W Pout]:
Discrete Transistors line-up: AT-38043, AT-33225
Detector diodes for power control: HSMS-28xx


NMT/ETACS/NTACS Tx-Driver top

"glue" part that amplifies modulator output sufficiently to drive power chain

handset [871-904 MHz (ETACS), 915-925 (NTACS), 3V operation, 0 to 10 mW Pout, high efficiency]:
Discrete Transistors: HBFP-0420, AT-320xx, AT-415xx
Integrated Circuit Amplifiers: MGA-81563

base station radio card [860-870 MHZ (NTACS), 916-949 MHz (ETACS), 0 to 10 mW Pout]:
Discrete Transistors: HBFP-0420, AT-320xx, AT-415xx
Integrated Circuit Amplifiers: MGA-81563, MSA-0611, MSA-2111


NMT/ETACS/NTACS Tx-Modulator top

combines data with carrier
[FM modulated VCO]

3-6V:
AT-415, AT-320, AT-310, AT-305 as VCO


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this page last updated: 1 October 1999