Atec Rohde-Schwarz-SMIQ Series - Manual (Page 5)

Vector Signal Generator R&S SMIQ – Specifications 5
Analog modulation
Vector modulation
Level accuracy with vector modulation, additional error with
ALC OFF, relative to CW
<0.3 dB
Mode
I and Q modulation inputs
Input impedance
VSWR (DC to 30 MHz)
If R&S SMIQ is fitted with two fading simulators
(R&S SMIQB14 and R&S SMIQB15) and a noise
generator and distortion simulator (R&S SMIQB17), the
VSWR of the I and Q inputs for vector modulation (DC to
30 MHz) degrades to
Input voltage for full-scale input
external DC
50 Ω
<1.2
<1.25
0.5 V (1 V EMF with 50 Ω source)
Static error vector 3 )
level ≤8 dBm PEP (R&S SMIQ02B/03B)
level ≤5 dBm PEP (R&S SMIQ04B/06B)
up to 3.3 GHz
rms value
peak value
>3.3 GHz
rms value
peak value
<0.5%
<1%
<1%
<2%
Modulation frequency response
up to 5 MHz
up to 30 MHz <0.4 dB
<3 dB
Carrier leakage at 0 V input voltage,
referred to full-scale input
3 ) <−45 dBc
I/Q impairments
Carrier leakage
Setting range
Resolution
I ≠ Q
Setting range
Resolution
Quadrature offset
Setting range
Resolution
0% to 50%
0.5%
−12% to +12%
0.1%
−10° to +10°
0.1°
Envelope control
RF level can be controlled with an analog voltage of 0 V to 1 V
via the POWER RAMP input
Input impedance
Linear range
Attenuation error at
−20 dB
On/off ratio
Delay time
Rise/fall time (10% to 90%)
1 V: set level
0 V: maximum level attenuation
10 k
Ω
0 dB to −30 dB (−35 dB typ.)
<0.5 dB
>80 dB
1 µs typ.
<1 µs
I 2 Q 2 + =