LNFS-400

LOW NOISE FREQUENCY SYNTHESIZER

The LNFS-400 is a versatile low noise synthesizer with an output frequency range of 1 to 400 MHz. The instrument has 32 bit frequency resolution, 14 bit phase resolution and a low noise internal time base that can be phase-locked to an external 10 MHz signal for long term stability. Applications include frequency generation for instrumentation, microwave synthesis, phase noise characterization, radar synthesizers and telecommunication clock generators. The LNFS-400 has FSK and PSK modulation capabilities. The synthesizer is available in a stand alone enclosure or as a module. Model LNFS-400-RM is the stand alone version in a 2U rack-mount enclosure with LCD display and keypad. Remote control of the instrument is available through a RS-232 interface. This unit may be ordered with up to three independent synthesizers locked to the internal time base.

  • Features
  • Applications
  • Specifications
  • Options
  • Frequency range 1 - 400 MHz
  • Frequency Resolution: 0.2 Hz
  • Phase resolution: 0.38 mRadians
  • Low phase noise @ 180 MHz output
    -130 dBc/Hz @ 1 kHz
    -140 dBc/Hz @ 100 kHz
  • Instrumentation
  • Microwave synthesis
  • Phase noise characterization
  • Radar synthesizers
  • Telecom clock generation

PARAMETER

CONDITIONS

TYP

UNITS

Phase resolution

 

0.022

degrees

Phase offset range

 

+/- 360

degrees

Amplitude resolution

 

1.0

dBm

Frequency resolution

 

0.233

Hz

Frequency tuning range

 

1 – 400

MHz

Mech. tuning range

 

+/-1 E-6

-

Int. oscillator aging

after 30 days of operation

1 E-6

Per year

Max sine output level

50 ohm load,

accuracy +/-2dB

+15

dBm

Output isolation

 

60

dB

Phase noise L(f)

10 MHz output, +13 dBm

10 Hz

100 Hz

1 kHz

>10 kHz

-130

-135

-135

-145

dBc/Hz

 

Allan deviation sy(t)

Locked to ext reference

f = 5E6

1 s

10 s

100 s

 

2.0 E-12

3.0 E-13

3.0 E-14

 

Allan deviation sy(t)

Locked to ext reference

f = 10E6

1 s

10 s

100 s

 

2.0 E-12

3.0 E-13

3.0 E-14

 

Spurious

+13 dBm output level

-50

dBc

Harmonics

+13 dBm output level

-40

dBc

 

Product Name Number of Synthesizers
LNFS-4001
LNFS-400 OPT22
LNFS-400 OPT33
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