NZ508807A - Calibration of frequency offsets for frequency-shift-keyed, FSK, pager transmissions - Google Patents
Calibration of frequency offsets for frequency-shift-keyed, FSK, pager transmissionsInfo
- Publication number
- NZ508807A NZ508807A NZ50880700A NZ50880700A NZ508807A NZ 508807 A NZ508807 A NZ 508807A NZ 50880700 A NZ50880700 A NZ 50880700A NZ 50880700 A NZ50880700 A NZ 50880700A NZ 508807 A NZ508807 A NZ 508807A
- Authority
- NZ
- New Zealand
- Prior art keywords
- calibration
- frequency
- dsp
- afc
- carried out
- Prior art date
Links
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
The frequency calibration process is carried out by a calibration circuit. The first portion of the calibration (77) is carried out by a Digital Signal Processor/Digital to Analog converter/Voltage Controller Thermal Compensation Oscillator (DSP/DACVCTCXO) arrangement. The second portion (78) is carried out by an Automatic Frequency Controller (AFC) and the third portion (79) is done using the DSP. The calibration can be initiated periodically or by an explicit request by a technician for example. The DSP/DAC/VCTCXO arrangement generates a test modulation signal (71) and sends it to the AFC. The AFC then generates an error signal (72) indicating the deviation of the modulated signal from a reference. The DSP uses this value to then make more precise estimates of adjustments to be made (73) before updating the calibration within a table (74).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NZ50880700A NZ508807A (en) | 2000-12-12 | 2000-12-12 | Calibration of frequency offsets for frequency-shift-keyed, FSK, pager transmissions |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NZ50880700A NZ508807A (en) | 2000-12-12 | 2000-12-12 | Calibration of frequency offsets for frequency-shift-keyed, FSK, pager transmissions |
Publications (1)
Publication Number | Publication Date |
---|---|
NZ508807A true NZ508807A (en) | 2002-10-25 |
Family
ID=19928276
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NZ50880700A NZ508807A (en) | 2000-12-12 | 2000-12-12 | Calibration of frequency offsets for frequency-shift-keyed, FSK, pager transmissions |
Country Status (1)
Country | Link |
---|---|
NZ (1) | NZ508807A (en) |
-
2000
- 2000-12-12 NZ NZ50880700A patent/NZ508807A/en not_active IP Right Cessation
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PSEA | Patent sealed | ||
RENW | Renewal (renewal fees accepted) | ||
RENW | Renewal (renewal fees accepted) | ||
RENW | Renewal (renewal fees accepted) | ||
ERR | Error or correction |
Free format text: THE AGENT HAS BEEN CORRECTED TO 121164, TAIT LIMITED, 558 WAIRAKEI ROAD, BURNSIDE, CHRISTCHURCH 8053, NZ; THE CONTACT HAS BEEN CORRECTED TO 121164, TAIT LIMITED, 558 WAIRAKEI ROAD, BURNSIDE, CHRISTCHURCH 8053, NZ Effective date: 20140528 Effective date: 20140528 Free format text: THE OWNER HAS BEEN CORRECTED TO 121164, TAIT LIMITED, 558 WAIRAKEI ROAD, BURNSIDE, CHRISTCHURCH 8053, NZ |
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LAPS | Patent lapsed |