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Vector Modulation Specifications

N5172B only

I/Q modulator external inputs

Bandwidth Baseband (I or Q) Up to 100 MHz baseband, nominal

RF (I+Q) Up to 200 MHz RF, nominal

I or Q offset ± 100 mV

I/Q gain ± 1 dB

Quadrature angle adjustment ± 200 units

Full scale input drive (I+Q) 0.5 V into 50 Ω, nominal

Internal I/Q baseband generator adjustments

(Options 653 and 655)

I/Q offset ± 20% (0.025% dB 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 ± 500 ns (1 picosecond resolution)

I/Q delay ± 250 ns (1 picosecond resolution)

External I/Q outputs

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 Baseband (I or Q) 60 MHz, nominal (Option 653 and 655)

RF (I+Q) 120 MHz, nominal (Option 653 and 655)

Amplitude ﬂ atness ± 0.2 dB measured with channel corrections optimized for IQ output

Phase ﬂ atness ± 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 parameter ranges and not speciﬁ cations.

2. Internal IQ adjustments apply to RF out and IQ outputs simultaneously.

-200 -150 -100 -50 0 50 100 150 200

-1

-3

-5

-7

-9

-11

-13

-15

Frequency offset from carrier (MHz)

5800 MHz

3500 MHz

2200 MHz

1900 MHz

1800 MHz

850 MHz

-34.00

-33.50

-33.00

-32.50

-32.00

-31.50

-31.00

-30.50

-30.00

-60 -40 -20 0 20 40 60

Power (dBm)

Frequency offset (MHz)

I/Q bandwidth plot using internal baseband generator

(Channel Correctons ON)

850 MHz

1800 MHz

1900 MHz

2200 MHz

3500 MHz

5800 MHz

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 30 31

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