
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-400 | 1 |
LNFS-400 OPT2 | 2 |
LNFS-400 OPT3 | 3 |