Q2406 Datasheet, PDF (48/81 Pages) List of Unclassifed Manufacturers – SELF CONTAINED E GSM/GPRS 900/1800 OR 850/1900 BI BAND MODULE

WM_PRJ_Q2400_PTS_002 - 002
24th January 2003
2.20 RF interface
The impedance is 50 Ohms nominal and the DC impedance is 0 Ohm.
2.20.1 RF connections
Spring contact
Two land patterns set on the PCB support the RF connection which can
be used by the application through spring contacts or a soldered RF cable.
Since no standard spring contact is available for WISMO Quik Q24x6
Series, this solution requires a specific part to be developed.
Soldered solution
The soldered solution will preferably be based on a RG178 coaxial cable.
Notes :
• The WISMO Quik Q24x6 Series does not support an antenna switch for
a car kit but this function can be implemented externally and it can be
driven using a GPIO.
• The antenna cable and connector should be chosen in order to minimise
losses in the frequency bands used for GSM 850/900MHz and
1800/1900MHz.
• 0.5dB can be considered as a maximum value for loss between the
module and an external connector.
2.20.2 RF performances
RF performances are compliant with the ETSI recommendation GSM 05.05.
The main parameters for Receiver are :
• GSM850 Reference Sensitivity (Q2426) = -104 dBm Static & TUHigh
• E-GSM900 Reference Sensitivity (Q2406)= -104 dBm Static & TUHigh
• DCS1800 Reference Sensitivity (Q2406)= -102 dBm Static & TUHigh
• PCS1900 Reference Sensitivity (Q2426)= -102 dBm Static & TUHigh
• Selectivity @ 200 kHz : > +9 dBc
• Selectivity @ 400 kHz : > +41 dBc
• Linear dynamic range : 63 dB
• Co-channel rejection : >= 9 dBc
And for Transmitter :
• Maximum output power (EGSM & GSM850): 33 dBm +/- 2 dB at ambient
temperature
• Maximum output power (GSM1800 & PCS1900) : 30 dBm +/- 2 dB at
ambient temperature
• Minimum output power (EGSM & GSM850) : 5 dBm +/- 5 dB at ambient
temperature
• Minimum output power (GSM1800 & PCS1900) : 0 dBm +/- 5 dB at
ambient temperature
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