8648B AGILENT TECHNOLOGIES, 8648B Datasheet - Page 14

• Manufacturer Part Number: 8648B
• Description: SIGNAL GENERATOR FREQUENCY / PULSE, 2GHZ
• Manufacturer: AGILENT TECHNOLOGIES

Specifications of 8648B

• Signal Generator Type: Signal
• Bandwidth: 2GHz
• Modulation Type: AM, FM, Phase
• Supply Voltage Range: 90V To 264V
• External Height: 165mm
• External Width: 330mm
• External Depth: 368mm
• Lead Free Status / RoHS Status: na

14
Baseband EVM performance versus symbol rate
(root Nyquist filter, modulation = QPSK)
RF EVM performance versus symbol rate
(fc = 1 GHz, root Nyquist filter, ALC = off, modulation = QPSK)
I/Q baseband generator
Custom digitally modulated signals
Typcal performance (power levels + 4 dBm [ + 8 dBm, Option UNB])
PSK formats
1. Specifications apply at power levels +4 dBm, Option (UNB) with default scale factor of I/Q outputs.
2. Parentheses denote typical performance.
Modulation
Filter
Modulation index
Symbol rate (Msym/s)
fc = 1 GHz
fc = 2 GHz
fc = 3 GHz
fc = 4 GHz
Filter factor ( or B b T)
QPSK
N/A
(0.9)
(1.0)
(1.5)
(2.8)
0.25
4
(continued)
Error vector magnitude
Root Nyquist
/4DQPSK
(% rms)
N/A
(0.9)
(1.0)
(1.5)
(2.6)
0.25
4
1,2
16QAM
(% rms)
RF EVM performance versus frequency
(root Nyquist filter, a = 0.25, ALC = off, modulation = /4DQPSK)
Effects of automatic level control (ALC) on EVM performance
(fc = 1 GHz, root Nyquist filter, a = 0.25, modulation = QPSK)
N/A
(0.8)
(1.0)
(1.4)
(3.5)
0.25
4
Shift error
2FSK
(0.7)
(0.7)
(0.8)
(1.0)
0.5
0.5
1
1,2
Gaussian
Global phase error
(degrees rms)
GMSK
N/A
(0.2)
(0.2)
(0.4)
(0.5)
0.5
1
1,2