Agilent Technologies E4438C manual Specifications for I/Q Characteristics, Clock

Specifications for I/Q Characteristics

Clock
Sample rate	1 Hz to 100 MHz
Resolution	0.001 Hz
Accuracy	Same as timebase +2-42[in non-integer applications]
Baseband filters
40 MHz	used for spur reduction
2.1 MHz	used for ACPR reduction
Through	used for maximum bandwidth
Reconstruction filter: [fixed]
50 MHz	[used for all symbol rates]
Baseband spectral purity1
[full scale sinewave]
Harmonic distortion
100 kHz to 2 MHz	(< –65 dBc)
Phase noise	(< –127 dBc/Hz)
[baseband output of 10 MHz sinewave at 20 kHz offset]
IM performance	(< –74 dB)
[two sinewaves at 950 kHz and 1050 kHz at baseband]
Triggers
Types	Continuous, single, gated, segment advance
Source	Trigger key, external, remote [LAN, GPIB, RS-232]
External polarity	Negative, positive
External delay time	10 ns to 40 sec plus latency
External delay resolution	10 ns

Markers

[Markers are defined in a segment during the waveform generation process, or from the ESG front panel. A marker can also be tied to the RF blanking feature of the ESG.]

Marker polarity	Negative, positive
Number of markers	4
Multicarrier
Number of carriers	Up to 100 [limited by a max bandwidth of 80 MHz
	depending on symbol rate and modulation type]
Frequency offset [per carrier]	–40 MHz to +40 MHz
Power offset [per carrier]	0 dB to –40 dB
Modulation	BPSK, QPSK, OQPSK, π/4DQPSK, 8PSK,
PSK
	16PSK, D8PSK
QAM	4, 16, 32, 64, 128, 256
FSK	Selectable: 2, 4, 8, 16
MSK
ASK
Data	Random ONLY
Multitone
Number of tones	2 to 64, with selectable on/off state per tone
Frequency spacing	100 Hz to 80 MHz
Phase [per tone]	Fixed or random

1. Parentheses denote typical performance.

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