| 摘要 |
<p>A radio pager capable of changing the reception frequency thereof, as desired, and having a replaceable crystal oscillator (82). A reception frequency selecting device selects one of call signals having a plurality of predetermined frequencies which matches the crystal oscillator (82). A casing (102) is formed with a first opening (102a) for allowing the crystal oscillator (82) to be selectively attached to or detached from a printed circuit board (104), and a second opening (102b) for allowing the oscillator (82) to be selectively inserted into or pulled out of the casing (102). <MATH></p> |
