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Level sweep, Spectral purity – Atec Rohde-Schwarz-SMJ100A User Manual

Page 9

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Version 05.00, December 2007

R&S

®

SMJ100A Vector Signal Generator

9

Level sweep

Operating modes

digital sweep in discrete steps

automatic, single, step,
external single, external step,
manual, or external trigger

Sweep range

full level range

Step width

logarithmic

0.1 dB to 20 dB per step

range

10 ms to 10 s

Dwell time

resolution 0.1

ms

Spectral purity

unmodulated

level <8 dBm

<–30 dBc

Harmonics

level <13 dBm

typ. <–30 dBc

level >–50 dBm, CW,
vector modulation (full-scale DC input),
>10 kHz offset from carrier and
outside the modulation spectrum

0.3 MHz

≤ f ≤ 200 MHz

<–77 dBc

200 MHz < f

≤ 1500 MHz

<–80 dBc

1500 MHz < f

≤ 3000 MHz

<–74 dBc

f > 3000 MHz

<–68 dBc

850 kHz offset from carrier and
outside the modulation spectrum


0.3 MHz

≤ f ≤ 200 MHz

<–77 dBc

200 MHz < f

≤ 1500 MHz

<–86 dBc

1500 MHz < f

≤ 3000 MHz

<–80 dBc

Nonharmonics

f > 3000 MHz

<–74 dBc

Power supply and mechanically related
nonharmonics

at RF = 1 GHz,
50 Hz to 10 kHz from carrier

<–70 dBc

1500 MHz < f

≤ 3000 MHz

<–74 dBc

Subharmonics

3000 MHz < f

≤ 6000 MHz

<–50 dBc

carrier offset >10 MHz,
measurement bandwidth 1 Hz, CW

20 MHz

≤ f ≤ 200 MHz

<–146 dBc (typ. –149 dBc)

200 MHz < f

≤ 1500 MHz

<–150 dBc (typ. –153 dBc)

1.5 GHz < f

≤ 3 GHz

<–148 dBc (typ. –151 dBc)

f > 3 GHz

<–146 dBc (typ. –149 dBc)

vector modulation with full-scale DC input

20 MHz

≤ f ≤ 200 MHz

<–140 dBc (typ. –143 dBc)

200 MHz < f

≤ 1500 MHz

<–143 dBc (typ. –146 dBc)

1.5 GHz < f

≤ 3 GHz

<–142 dBc (typ. –145 dBc)

Wideband noise

f > 3 GHz

<–140 dBc (typ. –143 dBc)

carrier offset 20 kHz, measurement
bandwidth 1 Hz, unmodulated

20 MHz

≤ f ≤ 200 MHz

<–126 dBc (typ. –130 dBc)

f = 1 GHz

<–129 dBc (typ. –133 dBc)

f = 2 GHz

<–123 dBc (typ. –127 dBc)

f = 3 GHz

<–119 dBc (typ. –123 dBc)

f = 4 GHz

<–117 dBc (typ. –121 dBc)

SSB phase noise

f = 6 GHz

<–113 dBc (typ. –117 dBc)

rms value at f = 1 GHz

300 Hz to 3 kHz

<1 Hz

Residual FM

20 Hz to 23 kHz

<4 Hz

Residual AM

rms value 20 Hz to 23 kHz

<0.02 %