24 January 2008
Specification for crystal filter: QF 6.990……....7.010-0280/06
1. General
1.1. Package
1.2. Type name: QF 6.990…….7.010-0280/06
1.3. Number of poles: 5
1.4. Operating temperature range: -30°C to +85°C
1.5. Storage temperature range: -45°C to +85°C
2. Electric values
2.1. Nominal centre frequency fo [ MHz ]: 6.990 , 6.992, 6.994, 6.996, 6.998, 7.000, 7.002
7.004, 7.006, 7.008, 7.010
2.2. Pass band
2.2.1. Centre frequency fc at 25°C 3°C: fo 180Hz
2.2.2. Bandwidth between 3 dB - frequencies: > fc
1.4 kHz
2.2.3. Ripple at fc 0.8 kHz: < 1.0 dB ( < 0.5 dB peak to peak )
2.2.4. Insertion loss: < 3.0 dB
( measured on smallest attenuation in pass band )
2.3. Stop band
2.3.1. fc 5.5 kHz > 60 dB
2.3.2. Alternate Attenuation > 70 dB ( except spurious )
2.4. Nominal input power level +10 dBm
2.4.1. Maximal input power level +25 dBm
2.5. Terminating impedance R//C ( input and output ): 50 // 0 pF
3. Marking ( i. e. ): manufacturer, date code
QF 6.990-0280/06
