MOBILE RADIO EQUIPMENT

PURPOSE:To make a frequency stable in the mobile radio equipment provided with a reference oscillator having a frequency variable function. CONSTITUTION:A reference oscillator 11 having a frequency variable function is used for an oscillator for a 1st local oscillation circuit 9 comprising a PLL syn...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: SHIMIZU ISAO, KOJIMA RITSU
Format: Patent
Sprache:eng
Schlagworte:
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:PURPOSE:To make a frequency stable in the mobile radio equipment provided with a reference oscillator having a frequency variable function. CONSTITUTION:A reference oscillator 11 having a frequency variable function is used for an oscillator for a 1st local oscillation circuit 9 comprising a PLL synthesizer and for an oscillator for a 2nd local oscillation circuit 10 subject to PLL control. Moreover, a frequency of a 2nd IF signal is measured by a counter 12 based on a time gate generated by the reference oscillator 11, a control section 13 obtains a frequency deviation of the 2nd IF signal based on the frequency of the 2nd IF signal measured and controls the frequency of the reference oscillator 11 so as to decrease the deviation.