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參數(shù)資料
| 型號： | MC145750VFU |
| 廠商： | MOTOROLA INC |
| 元件分類： | 通信及網(wǎng)絡 |
| 英文描述： | QPSK Encoder |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQFP48 |
| 封裝： | PLASTIC, VQFP-48 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大?。?/td> | 296K |
| 代理商： | MC145750VFU |
MC145750
MOTOROLA
9
Figure 7. I/Q Output Interface Circuit 1
MC145750
I/Q OUTPUT
LEVEL SHIFT
BALANCE CONTROL
TO MRFIC0001
MODULATOR
R
R
R
R
+
–
+
–
Figure 8. I/Q Output Interface Circuit 2
MC145750
I/Q OUTPUT
LEVEL SHIFT
BALANCE CONTROL
TO MRFIC0001
MODULATOR
R
R
R
R
+
–
+
–
Figure 9. Modulation Accuracy Measurement Schematic
Measurement Equipment: Advantest Spectrum Analyzer R3365
Advantest Modulation Accuracy Analyzer R3541A
Rohde & Schwarz Modulation Unit SMHU–58
Conditions:
Internal PLL mode, 384 kbps (PHS), TA = 25
°
C
220
μ
F
220
μ
F
100 k
100 k
+ 5 V
– 5 V
+ 5 V
– 5 V
Iin
Qin
MODULATION UNIT
SMHU–58
(Zin = 50
)
IF
(240 MHz)
SPECTRUM
ANALYZER
R3365
MODULATION
ACCURACY
ANALYZER
R3541A
MC145750
Iout
+
–
Qout
+
–
Motorola cannot recommend one supplier over another and in no way suggests
that this is a complete listing of measurement equipment suppliers.
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