LG LG511C Service Manual page 37
Slide cell phone for tracfone
Hide thumbs
Also See for LG511C:
- Owner's manual (240 pages) ,
- Specifications (1 page) ,
- Quick start manual (13 pages)
Table of Contents
Advertisement
LG511C
LN510
1.4 Description of Frequency Synthesizer Circuit
1.4.1 Voltage Control Temperature Compensation Crystal Oscillator (VCTCXO, U1501)
The temperature variation of mobile phone can be compensated by TCXO. The reference frequency of a mobile
phone is -30~+85 C. The receives frequency tuning signals called TRK_LO_ADJ from QSC6075 as 0.5V~2.5V DC
via R and C filter in order to generate the reference frequency of 19.2MHz and input it into the frequency synthesizer
of UHF band. Frequency stability depending on temperature is
1.5 ppm.
LG Electronics Inc.
36/168
Advertisement
Table of Contents
