Atec Agilent-E8267D - Manual (Page 22)

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Basic modulation types (custom format )
PSK BPSK, QPSK, OQPSK, π/4 DQPSK, 8PSK,
16PSK, D8PSK
MSK User-defined phase offset from 0 to 100 °
QAM 4, 16, 32, 64, 128, 256
FSK Selectable: 2, 4, 8, 16 level symmetric, C4FM
User defined: Up to 16 custom deviation levels
Deviation resolution: 0.1 Hz
Symbol rate Maximum deviation
< 5 MHz 4 times symbol rate
5 MHz to 50 MHz 20 MHz
User-defined I/Q Custom map of 256 unique values
Vector accuracy 1 Formats: BPSK, QPSK, 16-256 QAM (α = 0.3, root
Nyquist filter, symbol rate 4 Msym/s)
EVM (% RMS)
≤ 20 GHz
< 1.2%, < 0.8% (typ)
> 20 to 32 GHz < 1.3% < 0.9% (typ)
> 32 to 44 GHz < 1.4% < 0.9% (typ)
Origin offset
250 kHz to 3.2 GHz
–45 dBc (typ)
3.2 to 44 GHz –50 dBc (typ)
EVM (measured)
FIR filter
Selectable
Nyquist, root Nyquist, Gaussian, rectangular
α: 0 to 1, B
b
T: 0.1 to 1
Custom FIR 16-bit resolution, up to 64 symbols long,
automatically resampled to 1024 coefficients (maximum)
> 32 to 64 symbol filter: symbol rate ≤ 12.5 MHz
> 16 to 32 symbol filter: symbol rate ≤ 25 MHz
Internal filters switch to 16 tap when symbol rate
is between 25 and 50 MHz
Symbol rate
For external serial data:
Adjustable from 1000 symbols/sec to a maximum
symbol rate of 50 Mbits/sec ÷ (#bits/symbol)
For internally generated data: Adjustable from 1000 symbols/sec to
50 Msymbols/second and a maximum of 8 bits per
symbol. Modulation quality may be degraded at
high symbol rates.
Internal baseband generator:
real-time mode
(Option 602)
1. Measured with Agilent 89441A vector signal analyzer. Valid after executing I/Q calibration, and instrument is maintained
within ±5 °C of calibration temperature. RF power < 0 dBm (Option 520) or < –3 dBm (Option 532, 544). When external inputs
are used, vector accuracy is equivalent to internal performance, after system calibration.
QPSK (measured)
Symbol Rate (Msymbol/sec)
EVM (%)
7
6
5
4
3
2
1
0
0 10 20 30 40 50
3 GHz
6 GHz
12 GHz
28 GHz
38 GHz
44 GHz
3 GHz
16 QAM (measured)
Symbol Rate (Msymbol/sec)
0 10 20 30 40 50
EVM (%)
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
3 GHz
6 GHz
12 GHz
28 GHz
38 GHz
44 GHz
3 GHz