LA1787M Datasheet, PDF (45/54 Pages) Sanyo Semicon Device – Single-Chip Tuner IC for Car Radios

LA1787M
Gain Distribution (FM)
This section investigates the gain in each block in the LA1787M when the Sanyo recommended circuits are used.
(Test conditions)
Ambient temperature: 26°C
Antenna and mixer input frequency: 98.1 MHz
First and second IF input frequency: 10.7 MHz
The input levels when V_SM = 2 V will be as follows.
ANT IN: 19 dBµ
MIX IN: 30 dBµ
1st IF IN: 42 dBµ
2nd IF IN: 60 dBµ
When the gains for each block are determined according to the above, the results are as follows.
RF GAIN: 11 dB
MIX GAIN: 12 dB
1st IF GAIN: 18 dB
FM
1st IF IN 56 pin
MIX IN 64 pin
RF
ANT IN
2nd IF IN 51 pin
11 dB
12 dB
Fig. 54
18 dB
A11773
No. 6655-45/54