23
Number of tones
2 to 1024
Tone spacing
1 kHz to 50 MHz, limited by 80 MHz I/Q bandwidth
Tone power (relative)
0 to –50 dB
Phase distribution
Fixed, random or parabolic
Suppression level
–50 to –90 dBc, depending on number of tones
and available calibration time.
Expected suppression = 80 dBc –10 log [N/8],
where N is the number of tones
Calibration interval
8 hours
Calibration time
10 minutes (8 tones, –80 dBc suppression)
Temperature stability
1 dB/°C (typical for IMD products) 5 dB/°C
(worst case for LO feedthrough and unbalanced
images)
Enhanced multitone signal with correction applied
Crest factor
[output power set at least 16 dB below maximum power]
> 16 dB
Randomness
89 bit pseudo-random generation, repetition period
3 x 10
9
years
Carrier to noise ratio
Magnitude error
≤
0.2 dB at baseband I/Q outputs.
Specifications for Signal Personality Characteristics
1. All values typical.
Enhanced multitone
1
[arbitrary waveform mode]
[Option 408]
AWGN
[real-time mode]
[Option 403]
Summary of Contents for E4438C
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