2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
Typical Operating Characteristics (continued)
(V CC = 2.8V, T A = +25°C, f LO = 2.5GHz, f REF = 40MHz, CS = high, RXHP = SCLK = DIN = low, RF BW = 10MHz, Tx output at 50 Ω
unbalanced output of balun, using the MAX2839 Evalutation Kit.)
EVM vs. TX OUTPUT POWER
-30
-35
TX SIDEBAND LEVEL vs. FREQUENCY
TX GAIN SET TO MAX - 3dB
-30
TX SIDEBAND LEVEL vs. GAIN SETTING
(64 QAM FUSC, 10MHz CHANNEL BANDWIDTH)
3.0
-40
T A = +85°C
-40
T A = +85°C
2.5
-45
-50
-55
-60
-50
-60
2.0
1.5
-65
T A = -40°C
1.0
-70
-75
T A = +25°C
-70
T A = -40 ° C
T A = +25 ° C
0.5
-80
-80
0
2300 2350 2400 2450 2500 2550 2600 2650 2700
0
9
18
27 36 45
54
63
-50
-40
-30 -20
-10
0
FREQUENCY (MHz)
TX OUTPUT EMISSION SPECTRUM
TX GAIN CODE
HISTOGRAM: TX LO LEAKAGE
P OUT (dBm)
HISTOGRAM: TX SIDEBAND SUPPRESSION
0
-10
-20
RBW = 200kHz
372
310
MEAN = -46.235dBc
DEV = 5.1577dB
SAMPLE SIZE = 7841
504
420
MEAN = -47.856dBc
DEV = 2.8827dB
SAMPLE SIZE = 7841
-30
-40
-50
-60
-70
-80
-90
248
186
124
62
336
252
168
84
-100
0Hz
26.5GHz
1 σ /div
1 σ /div
LO FREQUENCY vs.
25dB
TX OUTPUT RETURN LOSS vs. FREQUENCY
2.8
2.7
DIFFERENTIAL TUNE VOLTAGE
-50
-60
-70
PHASE NOISE vs. OFFSET FREQUENCY
5dB/div
2.6
2.5
2.4
2.3
2.2
-80
-90
-100
-110
-120
-130
-140
-25dB
2.1
-150
2GHz
3GHz
-1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0
2.5
0.0001
0.001
0.01
0.1
1
10
FREQUENCY
DIFFERENTIAL TUNE VOLTAGE (V)
OFFSET FREQUENCY (MHz)
16
______________________________________________________________________________________
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