Atec Agilent-N5181B-N5182B - Manual (Page 18)

18
Vector Modulation Specifications
N5182B only
I/Q modulator external inputs 1
Bandwidth Baseband (I or Q)
RF (I+Q)
Up to 100 MHz baseband, nominal
Up to 200 MHz RF, nominal
I or Q offset ± 100 mV (200 uV resolution)
I/Q gain balance ± 4 dB (0 .001 dB resolution)
IQ attenuation 0 to 50 dB (0 .01 dB resolution)
Quadrature angle adjustment ± 200 units (0 .1 units resolution)
Full scale input drive (I+Q) 0 .5 V into 50 Ω, nominal
Internal I/Q baseband generator adjustments 1, 2 (Options 656 and 657)
I/Q offset ± 20% (0 .025% resolution)
I/Q gain ± 1 dB (0 .001 dB resolution)
Quadrature angle adjustment ± 10 ° (0 .01 degrees resolution)
I/Q phase ± 360 .00 ° (0 .01 degrees resolution)
I/Q skew ± 800 .00 ns (1 picosecond resolution)
I/Q delay ± 250 .00 ns (1 picosecond resolution)
External I/Q outputs 1
Impedance 50 Ω, nominal per output
100 Ω, nominal differential output
Type Single-ended or differential (Option 1 EL)
Maximum voltage per output ± 0 .5 V peak-to-peak; into 50 Ω (200 uV resolution)
Bandwidth (I, Q) Baseband (I or Q) 80 MHz, nominal (Option 656 and 657)
RF (I+Q) 160 MHz, nominal (Option 656 and 657)
Amplitude flatness ± 0 .2 dB measured with channel corrections optimized for IQ output
Phase flatness ± 2 .5 degrees measured with channel corrections optimized for IQ output
Common mode I/Q offset ± 1 .5 V into 50 Ω (200 uV resolution)
Differential mode I or Q offset ± 25 mV into 50 Ω (200 uV resolution)
1. I/Q adjustments represent user intverface nominal parameter ranges and not specifications.
2. Internal IQ adjustments apply to RF out and IQ outputs simultaneously.
-200 -150 -100 -50 0 50 100 150 200
3
1
-1
-3
-5
-7
-9
-11
-13
-15
Frequency offset from carrier (MHz)
Measured external IQ bandwidth
dB
5800 MHz
3500 MHz
2200 MHz
1900 MHz
1800 MHz
850 MHz
-80 -60 -40 0 -20 20 40 60 80
Normalized power
(d
Bm
)
Frequency offset (MHz)
Measured RF I/Q channel flatness using internal baseband generator
(MXG factory channel correctons ON)
-0.60
-0.40
-0.20
0.00
0.20
0.40
0.60
850 MHz
1000 MHz
1800 MHz
1900 MHz
2200 MHz
5800 MHz