Precision Calibrated CW Solid State Noise Sources
发布时间：2025-5-2 9:23:29
加入购物车
Precision Calibrated Noise Sources
|
Features |
|
-
ENR 12…15 dB typical
-
High stability
-
Good flatness
|
-
No high voltage supply required
-
Compact solid state source
-
High reliability, rugged construction
|
|
Applications |
 |
-
Measurement and test equipment
-
Mm-wave noise source
-
Calibration
-
Noise figure measurement
-
Сompatible with noise figure meters for all brand names
|
|
Description |
|
|
ELVA-1's calibrated noise source ISSN-XX series delivers a uniform level of noise power spectral density within the whole waveguide frequency range. Sources are available in eight waveguide bands covering 26.4-170 GHz. A Silicon IMPATT diode is employed as a fundamental building block of the source. High stability of the device allows it to be used for test and instrumentation applications in place of gas-tube noise sources. Low DC power requirements eliminate the need for complex high voltage supplies. There are two operation modes: CW mode and pulsed AM mode with modulation frequency up to 1 kHz. Typical value of excess noise ratio (ENR) as a function of frequency is given on the plot below. |
|
|
|
|
Block Diagram of Noise Source |
|
 |
|
Inputs and Controls: |
|
 |
Notes:
-
Power/ Triggering Inversion Switch can be used for manual ON/OFF. “INV” position is ON.
-
Microwave power can be switched with TTL-level control voltage.
-
If Triggering Inversion Switch is in OFF (Down) position active level is high, otherwise (INV position) – active level is low.
-
Each source supplied calibrated relative to liquid nitrogen cooled load.
Specifications
|
Model Number |
ISSN-28 |
ISSN-22 |
ISSN-19 |
ISSN-15 |
ISSN-12 |
ISSN-10 |
ISSN-08 |
ISSN-06 |
|
Frequency Band |
Ka |
Q |
U |
V |
E |
W |
F |
D |
|
and Range, GHz |
26.5-40 |
33-50 |
40-60 |
50-75 |
60-90 |
75-110 |
90-140 |
110-170 |
|
Input waveguide |
WR28 |
WR22 |
WR19 |
WR15 |
WR12 |
WR10 |
WR8 |
WR6 |
|
Wavequide Flange |
UG383/U |
UG383/U |
UG383/U-M |
UG385/U |
UG-387/U |
UG387/U-M |
UG387/U-M |
UG387/U-M |
|
Bandwidth, GHz |
Full |
Full |
Full |
Full |
Full |
Full |
Full |
Full |
|
ENR, dB (nom) |
15 |
14 |
13 |
13 |
13 |
12 |
12 |
12 |
|
ENR Flatness, dB |
±1 |
±1.5 |
±1.5 |
±1.5 |
±1.5 |
±1.5 |
±1.5 |
±2 |
|
Stability, dB/°C |
0.01 |
0.01 |
0.01 |
0.01 |
0.01 |
0.01 |
0.01 |
0.01 |
|
Stability/Day, dB |
0.05 |
0.05 |
0.05 |
0.05 |
0.05 |
0.05 |
0.05 |
0.05 |
|
Biasing Voltage, V |
+18…+28 |
|
Sizes, mm* |
50/75 |
50/75 |
50/75 |
50/75 |
50/60 |
50/60 |
50/60 |
50/60 |
|
* Cylinder diameter/length (without isolator)
|
Notes:
-
Maximum operating temperature is +60°C
-
Diode operating current is 50…100 mA.
-
A limiting value of modulation frequency is 1 kHz (external triggering).
-
Triggering signal amplitude is TTL level.
-
Bias voltage is +18 V It is possible to supply the noise source with +28VDC biasing for the compatibility with commonly used noise meters.
-
External triggering connector is SMA female
-
ENR would be increased for narrower bandwidth. Please contact factory.
-
For higher frequency models please contact factory.
Power supply for input power 220VAC/50Hz, 110VAC/60Hz or 100VAC/50Hz are available optionally.
For the precision control and fast modulation of the output power of the source Voltage Controlled Attenuator VCVA-XX series can be supplied optionally