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參數(shù)資料
| 型號： | LM1863 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | AM Radio System for Electronically Tuned Radios |
| 中文描述： | AM收音機系統(tǒng)的電子調諧收音機 |
| 文件頁數(shù)： | 5/14頁 |
| 文件大?。?/td> | 268K |
| 代理商： | LM1863 |
Performance Characteristics of Applications Circuit
TL/H/5185–12
TL/H/5185–13
TL/H/5185–14
TL/H/5185–15
Cross modulation is
measured using the
following dummy an-
tenna:
The following procedure was used to measure cross modulation:
1. Tune the radio to the center frequency of interest and tune V
GEN
, to this same frequency.
2. Set at 0 dB audio reference with V
GEN
,
e
10 mV RMS and 30% AM mod; f
MOD
e
1 kHz.
3. Remove the modulation from V
GEN1
and set the level of V
GEN1
.
4. Set the modulation level of V
GEN2
e
80% at f
MOD
e
1 kHz and tune V
GEN2
g
40 kHz away from
center frequency.
5. Increase the level of V
GEN2
until
b
40 dB of audio is recovered. The level of V
GEN2
is the cross
modulation measurement.
TL/H/5185–16
Additional Performance Information:
*
THD for 80% modulation for f
MOD
e
1 kHZ at:
V
GEN
e
1V is 0.5%
V
GEN
e
10 mV is 0.4%
*
Tweet
k
2% at all input levels.
*
Typical time for valid stop indication
k
50 ms.
Note:
Tweet is an audio tone produced by the 2nd and 3rd harmonic of the IF beating against the received
signal. It is measured as an equivalent modulation level: ie, 30% tweet has the same amplitude at the
detector as a desired signal with 30% modulation.
5
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| LM1863M | AM Radio System for Electronically Tuned Radios |
| LM1865 | Advanced FM IF System |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM1863M | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:AM Radio System for Electronically Tuned Radios |
| LM1863N/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:AM Receiver Circuit |
| LM1863N/B+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:AM Receiver Circuit |
| LM1865 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Advanced FM IF System |
| LM1865M | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Advanced FM IF System |
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