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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
ANT IN
RF
MIX IN 64 pin
1st IF IN 56 pin
2nd IF IN 51 pin
11 dB
12 dB
18 dB
A11773
Fig. 54
No. 6655-45/54
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