WLAN Modulation Analysis
(Option 89601A-B7R)
Note that analysis is only valid
over the frequency range of the
N4010A-101/102.
OFDM modulation analysis
Signal acquisition
Supported standards 802.11a, HiperLAN2, and 802.11g (OFDM)
Modulation formats BPSK, QPSK, 16QAM, 64QAM
(auto detect or manual override)
Search length
Minimum Result length + 6 symbol times (28 µs)
Maximum 5.18 ms
Result length Auto detect or adjustable from 1 to 1289 symbols
Triggering Single/continuous, free-run/channel/external
Measurement region Length and offset adjustable within result length
Signal playback
Capture length ~5 ms (5MHz < span ≤ 22 MHz)
Adjustable parameters
Data format IEEE 802.11a/g OFDM, IEEE 802.11g DSSS-OFDM
HiperLAN2
Single button presets IEEE 802.11a/g OFDM, IEEE 802.11g DSSS-OFDM
HiperLAN2
I-Q normalize On/Off
Sub-carrier spacing Continuously adjustable
Symbol timing adjust Adjustable between 0 and guard interval
Guard interval 1/4, 1/8 (HiperLAN2 only), adjustable between
0 and 1 in 1/64 increments
Pilot tracking Phase, amplitude, timing
Carriers to analyze All or single
Demodulation measurement results
I-Q measured All carriers over all symbol times
I-Q reference All carriers over all symbol times (reference
computed from detected symbols)
Error vector Time, spectrum (for each carrier and symbol in the
frame)
RMS error vector Time, spectrum
Common pilot error Phase, magnitude
Symbol table and error summary EVM, pilot EVM, CPE (common pilot error), IQ
(origin) offset, frequency error, symbol clock, sync
correlation, number of symbols, modulation format,
code rate, bit rate
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