2.3GHz to 2.7GHz Wireless
Broadband RF Transceiver
Typical Operating Characteristics (continued)
(MAX2837 evaluation kit: V CC_ = 2.8V, f LO = 2.5GHz, 10MHz channel 16E UL/DL WiMax signal, f REF = 40MHz, ENABLE =
CS = high, RXHP = SCLK = DIN = low, T A = +25°C, unless otherwise noted.)
0
Tx OUTPUT POWER vs. TEMPERATURE
Tx VGA SET TO MAX - 3dB
Tx OUTPUT SPECTRUM
P OUT = -3dBm
10
Tx P OUT vs. GAIN SETTING
-40 °C
-0.5
-1.0
EVM = 1.35%
f RF = 2.5GHz
0
-10
+25 °C
-1.5
-2.0
-2.5
-3.0
-20
-30
-40
-50
+85 °C
-40 °C
+25 °C
+85 °C
-40
-15
10 35
60
85
0
8
16
24 32 40 48
56
64
TEMPERATURE ( ° C)
Tx TRANSMIT SPECTRUM FROM
DC TO 26.5GHz
5MHz/div
EVM vs. Tx OUTPUT POWER
Tx VGA GAIN CODE
PHASE NOISE vs. OFFSET FREQUENCY
0
-10
-20
-30
-40
RF
4/3RF
2RF
8/3RF
4RF
RBW = 1MHz
2.0
1.8
1.6
-50
-60
-70
-80
-90
-50
-60
-70
-80
-90
-100
16/3RF
1.4
1.2
1.0
-100
-110
-120
-130
-140
-150
DC
26.5GHz
-30
-24
-18 -12 -6
0
0.001
0.01 0.1 1
10
OUTPUT POWER (dBm)
OFFSET FREQUENCY (MHz)
2.5kHz
PLL SETTLING TIME FROM SHUTDOWN
800
700
600
CRYSTAL OFFSET FREQUENCY
vs. C TUNE BITS
KYOCERA
(CX-3225SB)
500
400
300
200
500Hz/div
100
0
-100
-200
-300
-400
-500
-600
-2.5kHz
0s
1ms
-700
-800
0 10 20 30 40 50 60 70 80 90 100 110 120 130
C TUNE (DIGITAL BITS)
12
______________________________________________________________________________________
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