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11-254
RF2948B
Rev A6 040930
Upconverter Output P1dB versus VGC and VCC (Temp=25
oC;
TX IF IN=374MHz, RF LO=2068MHz @ -5dBm)
-10.0
-9.5
-9.0
-8.5
-8.0
-7.5
-7.0
-6.5
-6.0
-5.5
-5.0
-4.5
-4.0
-3.5
-3.0
-2.5
-2.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
TX VGC (VDC)
OP1dB, 2.7V
OP1dB, 3V
OP1dB, 3.3V
Upconverter Output P1dB versus RF LO Amplitude and Temp
(VCC=3V; TX VGC=1.6V; TX IF IN=374MHz, RF LO=2068MHz)
-26.0
-24.0
-22.0
-20.0
-18.0
-16.0
-14.0
-12.0
-10.0
-8.0
-6.0
-4.0
-2.0
0.0
-26.0
-22.0
-18.0
-14.0
-10.0
-6.0
-2.0
2.0
6.0
LO Amplitude (dBm)
OP1dB, 25°C
OP1dB, 85°C
OP1dB, -40°C
Modulator Amplitude Error and Image Suppression versus IF LO
Amplitude and Temp (VCC=3V; IF LO=748MHz; IQ IN=1MHz @ 100mVP-P)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
-30.0
-26.0
-22.0
-18.0
-14.0
-10.0
-6.0
-2.0
2.0
6.0
LO Amplitude (dBm)
0.0
6.0
12.0
18.0
24.0
30.0
36.0
42.0
48.0
54.0
60.0
Ampl.Err, 25°C
Ampl. Err, 85°C
Ampl. Err, -40°C
Image Supp, 25°C
Image Supp, 85°C
Image Supp, -40°C
Modulator LO Suppression versus IF LO Amplitude and Temp
(VCC=3V; IF LO=748MHz; IQ IN=1 MHz @ 100mVP-P)
23.0
23.5
24.0
24.5
25.0
25.5
26.0
26.5
27.0
27.5
28.0
-30.0
-26.0
-22.0
-18.0
-14.0
-10.0
-6.0
-2.0
2.0
6.0
LO Ampl (dBm)
LO Supp, 25°C
LO Supp, 85°C
LO Supp, -40°C
Upconverter Voltage Gain versus VGC and VCC (Temp=25
oC;
TX IF IN=374MHz @ -35dBm, RF LO=2068MHz @ -5dBm)
-6.0
-5.0
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
14.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
TX VGC (VDC)
Gain, 2.7V
Gain, 3V
Gain, 3.3V
Upconverter Voltage Gain versus RF LO Amplitude and Temp
(VCC=3V; TX VGC=1.6V; TX IF IN=374MHz@-35dBm, RF LO=2068MHz)
-22.0
-20.0
-18.0
-16.0
-14.0
-12.0
-10.0
-8.0
-6.0
-4.0
-2.0
0.0
2.0
4.0
6.0
8.0
-26.0
-22.0
-18.0
-14.0
-10.0
-6.0
-2.0
2.0
6.0
LO Amplitude (dBm)
Gain, 25°C
Gain, 85°C
Gain, -40°C
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