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| 型號(hào)： | MAX2102EVKIT-SO |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Evaluation Kit |
| 中文描述： | 評估板 |
| 文件頁數(shù)： | 3/8頁 |
| 文件大?。?/td> | 110K |
| 代理商： | MAX2102EVKIT-SO |
E
MAX 2102 Evaluation K it
_______________________________________________________________________________________
3
The quadrature amplitude mismatch is:
Amplitude mismatch = 20log (A
I
/ A
Q
)
where A
I
= IOUT signal amplitude, and A
Q
= QOUT
signal amplitude.
Vary the LO and RFIN frequency over the 950MHz to
2150MHz range, maintaining 125kHz between RFIN
and LO. Observe that the quadrature phase and gain
mismatch remains within the specifications across the
band.
Adjustments and Control
Presc aler
J umper J U2 controls prescaler enabling and disabling.
The prescaler on the MAX2102 EV kit is configured to
be disabled as shipped. In this configuration, there is
no short installed on J U2. To enable the prescaler,
install a short in the “PSON” position. This connects pin
25 on the MAX2102 to GND.
J U3 controls the prescaler divider ratio (modulus).
Install a short in the “DIV65” position for divide-by-65
mode, or in the “DIV64” position for divide-by-64 mode.
For external control of the prescaler modulus (for exam-
ple, from an external synthesizer), drive J U3’s center
connector directly.
Using a Differential Osc illator S ourc e
To use a differential LO source, do the following:
1) Remove R16.
2) Install J 5 (SMA connector), if not already populated.
3) Connect the RF balun so that LO and
LO
are driven
by complementary signals. Drive the balun input
from the LO signal source. Ensure that any unused
ports on the balun are terminated with 50
ter-
minators.
A 6dB attenuator connected in-line between the LO
and
LO
ports and the balun is recommended to
minimize reflections, which may affect balun and
signal-generator performance.
4) Drive the balun with sufficient power to drive LO
and
LO
with -10dBm each. Be sure to account for
losses in the balun, cables, and attenuators.
Interfac e to MAX 1002/MAX 1003
A/D Converters
The MAX2102 EV kit can easily be interfaced to the
MAX1002/MAX1003 EV kit, allowing evaluation of the
MAX2102 in the digital domain. The MAX1002/
MAX1003 are low-cost, dual, 60Msps/90Msps analog-
to-digital converters for DBS applications.
For most applications, an anti-aliasing lowpass filter is
inserted in the signal path between IOUT (MAX2102 EV
kit) and IIN+ (MAX1002/MAX1003 EV kit), and another
equivalent filter is inserted between QOUT and QIN+.
Refer to the MAX2102/MAX2105 data sheet for details
on this filter.
Using 50
filters with BNC connectors is a simple way
to implement the necessary filtering.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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