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参数资料
| 型号： | HPMX-2003T10 |
| 厂商： | AGILENT TECHNOLOGIES INC |
| 元件分类： | 调制器/解调器 |
| 英文描述： | 800 MHz - 1000 MHz RF/MICROWAVE VECTOR MODULATOR |
| 文件页数： | 16/16页 |
| 文件大小： | 188K |
| 代理商： | HPMX-2003T10 |
9
HPMX-2003 Modulation
Spectrum Diagrams
Figure 20, below, shows the test
setup that was used to generate
the modulation spectrum dia-
grams that appear on the GSM,
JDC and NADC applications pages
of this data sheet. The major dif-
ferences between the tests are
summarized in the table below.
The modulation spectra are cre-
ated by setting the function gen-
erator to the appropriate bit-clock
frequency. The pattern generator
is set to produce a pseudorandom
serial bit stream (n = 20) that is
NRZ coded. The pseudorandom
bit stream which simulates the
serial data in a digital phone is fed
to the base-band processor that
splits it into a two bit parallel
stream (I and Q) and then filters
each according to the require-
ments of the digital telephone sys-
tem being simulated. The I and Q
signals from the baseband filter
are then DC offset by 2.5 V using
the op-amp circuit. The output of
the modulator is monitored using
a spectrum analyzer.
System
Bit Clock Frequency
Baseband Filter
Channel (LO) Frequency
GSM
270 kHz
0.3 GMSK (HP 8657B)
900 MHz
JDC
42 kHz
α = 0.5 π/4 DQPSK (HP 8657D)
950 MHz
NADC
48.6 kHz
α = 0.35 π/4 DQPSK (HP 8657D)
835 MHz
Figure 20. Test Equipment Setup for Modulation Spectrum Diagrams.
LO
Q
R
V
CC
5
V
OUT
R
C
H
VER
1
HPMX-2003/5
1
HP-8563E
SPECTRUM ANALYZER
Iref
Qref
HP-8657B
SIGNAL GENERATOR
835-950 MHz
2
–
+
+5 V
Q + 2.5 V
Qref = 2.5 V
π/4DQPSK Q INPUT
ALL R = 5 k
OP-AMP: TL-084
I CHANNEL IS IDENTICAL
HP-3314A
FUNCTION
GENERATOR
HP-3780A
PRBS GENERATOR
HP-8657B
OR
HP-8657D
BASEBAND
PROCESSOR
OP-AMP CIRCUIT
(SEE ABOVE)
I + 2.5 V TO 1
2.5 V TO Iref
Q + 2.5 V TO 2
2.5 V TO Qref
I
Q
DATA
CLOCK
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相关代理商/技术参数 |
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|---|---|
| HPMX-2005 | 制造商:Hewlett Packard Co 功能描述:25 MHz - 250 MHz RF/MICROWAVE VECTOR MODULATOR |
| HPMX-2005_1 | 制造商:HITTITE 制造商全称:Hittite Microwave Corporation 功能描述:Silicon Bipolar RFIC 100 MHz Vector Modulator |
| HPMX-2006 | 制造商:AGILENT 制造商全称:AGILENT 功能描述:0.8 - 2.5 GHz Upconverter/Amplifier |
| HPMX-2006-BLK | 制造商:AGILENT 制造商全称:AGILENT 功能描述:0.8 - 2.5 GHz Upconverter/Amplifier |
| HPMX-2006-TR1 | 制造商:AGILENT 制造商全称:AGILENT 功能描述:0.8 - 2.5 GHz Upconverter/Amplifier |
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