National Semiconductor Corporation
Advanced Wireless Technology Group /

RF Test Report

5-December-2002 / Stefan Haenggi
/ Page 1 of 16

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TestData Summary of 5.2GHz WLAN

Direct Conversion RF Transceiver Board

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Serial Number : 0001Date : 3-FEB-03Tester : Stefan Haenggi

No /
Receiver Test
/ Measured / Target / Units
1 / Inband Input IP3 / -12 / >-10 / dBm
2 / Baseband S/N at 5.24GHz (ADC goes Vpp)
-82dBm
-65dBm
-30dBm / 9.6
23.8
24.8 / >+7
>+23
>+23 / dB
dB
dB
3 / Passband Peak Peak Ripple at 5.24GHz
(300kHz – 8MHz) / 0.8 / <1 / dBpp
4 / Overall Rejection at Carrier of
first Adjacent Channel (+/-20MHz)
second Adjacent Channel (+/-40MHz) / 31.4
50.8 / >25
>45 / dBc
dBc
5 / Baseband Image Rejection at 5.24GHz
1MHz
4MHz
8MHz / -28
-27
-26 / >-23
>-23
>-23 / dBc
dBc
dBc
6 / Static DC Offset after Mixer / 20 / <100 / mV
7
No /
Transmitter Test
/ Measured / Target / Units
1 / RF Output Power at 5.24GHz to meet Mask
Maximal AGC
Minimal AGC / +10
-20 / >+16
-20 / dBm
dBm
2 / Output IP3 / +26 / >+28 / dBm
3 / Passband Peak Peak Ripple
(300kHz – 8MHz) / 0.3 / <0.5 / dBpp
4 / Baseband Image Rejection at 5.24GHz
1MHz
4MHz
8MHz / -25
-25
-25 / <-30
<-30
<-30 / dBc
dBc
dBc
5 / Carrier Leakage at 5.24GHz / -35 / <-15 / dBc
No /
RF Local Oscillator Test
/ Measured / Target / Units
1 / Tuning Range (5.18GHz- 5.32GHz) / OK
2 / Integrated RMS PhaseJitter (10kHz to 10MHz)
5.18GHz
5.24GHz
5.32GHz / 2.2
2.3
2.2 / < 3.0
< 3.0
< 3.0 / deg
deg
deg
3
TestSetup

1-1) Receiver, IQ Baseband Analog Frequency Response

1-2)

1-3)Receiver, IQ Digital Baseband, Sampling Rate 40Ms/s, 4096 samples, Input Signal 5.244GHz, -82dBm, CW












1-4)1-5)

1-6) Receiver, IQ Digital Baseband, Sampling Rate 40Ms/s, 4096 samples, Input Signal 5.244GHz, -65dBm, CW



1-7)1-8)


7) Receiver, IQ Digital Baseband, Sampling Rate 40Ms/s, 4096 samples, Input Signal 5.244GHz, -30dBm, CW




1-9)1-10)

AD Discrete Step Performance


1-11)

No missing codes, more or less equal binwidth

1-12) Receiver, IQ Digital Baseband, Sampling Rate 40Ms/s, 4096 samples, Input Signal 5.240 + offset GHz, -65dBm, CW

/ Frequency Offset = 1MHz
Image Rejection = -28dBc

/ Frequency Offset = 4MHz
Image Rejection = -27dBc

/ Frequency Offset = 8MHz
Image Rejection = -26dBc
1-13) Receiver, IQ Digital Baseband, Sampling Rate 40Ms/s, 4096 samples, Input Signal 5.243GHz + 5.244, -30dBm, CW









1-14) Transmitter, I signal Analog Baseband after DAC, WLAN BPSK 800bit packet, Frequency domain, before filtering

Comments :

The baseband spectral shape should be able to pass the WLAN standard. The analog filter should have about 30dB rejection at 30MHz. With DAC who have internal interpolation (up-sampling) the filter specification could be relaxed significantly.

Transmitter, RF signal with WLAN OFDM BPSK 800bit packet
/ TX RF signal before going into PowerAmplifier
TX RF signal after PowerAmplifer at the antenna connector
RF PowerRMS = +10dBm
Spectral mask would pass
/ TX RF signal after PowerAmplifer at the antenna connector
RF PowerRMS = +16dBm
Spectral mask would probably not pass

Spectrum Mask from 802.11a Physical Layer Standard

1-15) Transmitter, RF signal with 2tone test for Linearity

TX RF Power RMS :+15dBm at atenna port

IP3 products:-22dBc

Resulting output IP3:+26dBm

Carrier Leakage:-35dBc

Image rejection:-25dBc

Transmitter, IQ signal Analog Baseband after Filter, WLAN BPSK 800bit packet, sampled with Scope, 1000 samples


Comments :

1-16) LO/2 signal, Frequency Domain, 10MHz HP RF Generator reference, 2.62GHz
Span 50MHz / Span 1MHz

Integrated RMS Phasenoise at 5.24GHz:

Frequency offset (Hz) / 10k / 20k / 50k / 100k / 10M
Phasenoise (dBm/Hz) / -72.2 / -82.9- / -93.7 / -99.2 / -104

RMS Phasejitter (10kHz-10MHz) = 2.2degree

Impulse response over a full RX-TX chain

TBD

Measured static values
No /
Static values
/ Measured / Target / Units
1 / Receiver ON current consumption
+8V PowerSupply
-8V PowerSupply
5V PowerSupply
3V PowerSupply / …………….
…………….
…………….
……………. / mA
mA
mA
mA
2 / Transmitter ON current consumption
+8V PowerSupply
-8V PowerSupply
5V PowerSupply
3V PowerSupply / …………….
…………….
…………….
……………. / mA
mA
mA
mA
3 / LO/2 RF Power
after Splitter
after TX booster
after RX booster / …………….
…………….
…………….
7