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參數(shù)資料
| 型號： | RF9678 |
| 廠商： | RF MICRO DEVICES INC |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | Multipole Connector |
| 中文描述： | TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, QCC16 |
| 封裝： | 4 X 4 MM, LCC-16 |
| 文件頁數(shù)： | 8/16頁 |
| 文件大?。?/td> | 200K |
| 代理商： | RF9678 |
Preliminary
5-98
RF9678
Rev A4 010622
5
M
U
Procedure for RF9678 Quadrature Modulator/AGC Optimization
1) Configure the test bench as shown in Figure 5.
2) Apply V
CC
to the part. (V
CC
=3.0V)
3) Set gain control to maximum. (V
GC
=2.4V)
4) Apply the LO signal. (760MHz@-5dBm, for an IF out of 380MHz)
5) Apply the I+ and Q+ signals: (Single Ended)
I Signal: 150kHz@ 500mVp, Phase=0°, 1.3V DC Offset
Q signal: 150kHz@ 500mVp, Phase =90°, 1.3V DC Offset
6) Set the DC levels at I
SIG
- and Q
SIG
- input pins to the nominal value (1.3V). The output spectrum should look similar to
Figure 6.
HP6624A or Equiv
DC Power Supply
Output 3
(VGC)
HPE4422B or Equiv
Analog Signal
Generator
(LO)
HP8904 or Equiv
Multifunction Signal
Generator
(Sine, I+ and Q+)
HP66332A or Equiv
DC Power Supply
(VCC, PD)
Rhode and
Schwartz FSIQ7 or
Equiv, Spectrum
Analyzer
9678410
MOD
OUT
LO
Q-
I-
I+
Q+
VGC
VCC
PD
HP6624A or Equiv
DC Power Supply
Outputs 1 and 2
(VREF)
Figure 5. RF9678 Test Setup
A
SWT
2 s
Unit
dBm
1RM
15 dBm
Ref Lvl
RF Att
40 dB
32.5 kHz/
Center 380 MHz
Span 325 kHz
EXT
RBW
VBW
5 kHz
50 kHz
-80
-70
-60
-50
-40
-30
-20
-10
0
10
Date:
6.FEB.2001
00:54:00
Figure 6. Unassigned Single Sideband Output
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