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-SSB AM Noise
SSB AM noise at 20 kHz offset (Typical values) measured at levels
>0 dBm
Frequency MHz CW/IQ (dBc/Hz)
3 GHz -130
6 GHz -125
Typical AM Noise at 1 GHz
RF Leakage
<0.5 ìV PD at the carrier frequency into a single turn 25 mm loop
25 mm or more from the case of the signal generator, for carrier frequencies
<3 GHz.
Wideband Noise
Applicable for all carrier levels at offsets >5 MHz and <50 MHz
excluding thermal noise (23°C ±5°C). Maximum output level
dependant on RF mode.
RF Mode 375 MHz 3 GHz 6 GHz
(dBc/Hz) (dBc/Hz) (dBc/Hz)
Power <-138 <-142 (-148 typ) <-136
Noise <-138 <-142 (-148 typ) <-136
ACP <-135 <-140 <-134
MODULATION
FM, AM and ÖM can be applied to the carrier using internal or external
modulation sources. The internal modulation source is capable of
generating two simultaneous signals into any one of the modulation
channels. The internal and external modulation sources can be simultaneously
enabled in order to produce combined amplitude and frequency
(or phase) modulation.
Internal and external IQ modulation can be applied. In this mode, FM,
AM and ÖM are not permitted.
Optional Pulse modulation can be used in combination with FM, AM,
ÖM and IQ from an external pulse source.
FREQUENCY MODULATION
Peak Deviation
Frequency Maximum Peak Deviation
250 kHz to 375 MHz 7.5 MHz
375 MHz to 750 MHz 3.75 MHz
750 MHz to 1.5 GHz 7.5 MHz
1.5 GHz to 3 GHz 15 MHz
3 GHz to 6 GHz 30 MHz
Displayed resolution is 4 digits or 1 Hz.
FM Accuracy
At 1 kHz rate
±3% of set deviation excluding residual FM
FM Bandwidth
0.5 dB DC to 200 kHz (DC coupled, 100 kÙ )
10 Hz to 200 kHz (AC coupled, 100 kÙ)
3 dB Typically 20 MHz (DC or AC coupled, 50 Ù)
Typical FM Bandwidth
Carrier Frequency Offset
For DC coupled FM ±(1 Hz + 0.1% of set deviation) after performing
a DCFM null operation
Total Harmonic Distortion
At 1 kHz rate
<0.15% for deviations up to 2% of maximum allowed deviation
<0.6% for deviations up to 20% of maximum allowed deviation
<1.5% at maximum deviation
PHASE MODULATION
Phase Deviation
0 to 10 radians
Displayed resolution is 4 digits or 0.01 radians.
Accuracy
At 1 kHz rate
±4% of set deviation excluding residual phase modulation
Bandwidth
0.5 dB 100 Hz to 10 kHz (AC coupled, 100 kÙ)
Total Harmonic Distortion
At 1 kHz rate
<0.5% at 10 radians deviation
Typically <0.1% at 1 radian deviation
AMPLITUDE MODULATION
Specifications apply for carrier frequencies from 2 MHz up to 2 GHz,
usable to 4 GHz and ‘Noise’ or ‘ACP’ RF modes.
Maximum specified output power is reduced by 2 dB, 10 MHz for ‘No
attenuator’ Option 001 with AM selected.
Modulation Depth
0 to 99.9%, Displayed resolution is 3 digits or 0.1%
Accuracy
At 1 kHz rate
±4% of set depth ±1% excluding residual AM
AM Bandwidth
1 dB DC to 200 kHz (DC coupled, 100 kÙ)
10 Hz to 200 kHz (AC coupled, 100 kÙ)
3 dB Typically 30 MHz (DC or AC coupled, 50 Ù)
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