CGH55015F1 Cree, Inc., CGH55015F1 Datasheet - Page 5

• Manufacturer Part Number: CGH55015F1
• Description: 15 W, 5500-5800 Mhz, Gan Hemt For Wimax
• Manufacturer: Cree, Inc.

Typical DOCSIS Performance
Copyright © 2008-2009 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree and
the Cree logo are registered trademarks of Cree, Inc.
5
CGH55015F1_P1 Rev 2.2 Preliminary
Note:
MER is the metric of choice for cable systems and can be related to EVM by the following equation:
EVM(%) = 100 x 10 ^ -((MERdB + MTAdB)/20). MTA is the “maximum-to-average constellation
power ratio” which varies with the modulation type: MTA = 0 for BPSK and QPSK; 2.55 for 16QAM
and 8QAM-DS; 3.68 for 64QAM and 32QAM-DS; 4.23 for 256QAM and 128QAM-DS
Note:
Under DOCSIS, 6.0 MHz Channel BW, 64 QAM, PN23, Filter Alpha 0.18, PAR = 6.7dB.
DOCSIS EVM vs Power Output of CGH55015 in Broadband Amplifier Circuit
DOCSIS Modulation Error Ratio vs Power Output of CGH55015
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
40
39
38
37
36
35
34
33
15
15
5.50 GHz
5.65 GHz
5.80 GHz
20
20
5.50 GHz
5.65 GHz
5.80 GHz
Power Output (dBm)
25
Power Output (dBm)
25
30
30
35
35
40
40
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www.cree.com/wireless
Fax: [phone]
Durham, NC 27703
4600 Silicon Drive
Cree, Inc.