VDI社製シンセサイザー、周波数カウンター

シンセサイザ

Virginia Diodes (VDI)社のシンセサイザーはテラヘルツアプリケーションを対象とした機能を備えたVDIソースおよびレシーバー用に設計されました。

8-20 GHz VDI Synthesizer

8-20 GHz Synthesizer
Fast Switching Speed
Frequency Sweeping Capability
Excellent Phase Noise Characteristics
Software based USB Control
Click on Synthesizer tab for specifications

Economy Synthesizer

>2 GHz Bandwidth Synthesizer up to 16 GHz
3 ms Switching Speed
12 Hz Step Size
Good Phase Noise Characteristics
Software based USB Control
Click on Economy Synthesizer tab for specifications

Frequency Counter

0.5-20 GHz Frequency Counter
Compact
Variable Measurement Speed
Software control through USB port
No wall plug or external power supply needed
Click on Frequency Counter tab for specifications

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仕様

8-20 GHz VDI Synthesizer

Synthesizerpix2

8-20 GHz VDI Frequency Synthesizer Data Sheet
Bandwidth:	8-20 GHz, SMA
Output power:	16 dBm minimum
Resolution:	<20 Hz
Harmonics:	-12 dBc
Non-harmonic spurs:	<-50 dBc in CW mode
Settling time:	100 kHz step settles to <20 Hz within 50 us
Sweep rate:	>25 MHz deviation at 14 ms/1 GHz, <25 MHz at 3us/1 MHz. Faster rates are possible with frequency error. 16-bit control of step time, 4 ns minimum. +/-25 MHz peak deviation at 3 kHz rate. Smaller deviations are proportionally faster up to ~100 kHz maximum rate. Faster rates are possible with frequency error.
Phase step size:	< 0.5 degrees
CW Switching time:	< 800 uS communication time (incremental) + settling time + sweep time (USB commands can be repeated every 1 ms.)
Frequency stability:	limited by reference oscillator
Frequency repeatability:	limited by reference oscillator
Absolute frequency accuracy:	<10 Hz + reference oscillator error
Reference input:	10 MHz, 10 dBm, SMA, option for 100 MHz
Sweep trigger output:	0-3.3 V digital signal, BNC (transitions high at the beginning of the sweep up and low at the beginning of the sweep down.)
Interface:	USB control by ASCII text commands to FTDI chip. Open source code provided for Labview 7.0
Size:	L x W x H: ~6.125 x 4.375 x 1.5” excluding connectors, reference oscillator, fan, and external DC power supply
DC Power:	+15 V ~3 A, -15 V ~80 mA, Separate DC power supply included with AC wall plug, consumes ~50 W
Options	1. Tracking Synthesizer (internal or external offset options available) 2. Phase continuous swept FM capability (see page 3 of the Synthesizer Product Datasheet for more information)

phasenoise updated 04 2016

Economy Synthesizer

VDI Economy Frequency Synthesizer Data Sheet
Bandwidth:	>2 GHz up to 16 GHz
Output power:	Optimally configured for the VDI multiplier chain
Resolution:	12 Hz
Harmonics:	<-15 dBc
Non-harmonic spurs:	<-45 dBc
CW Switching time:	3 ms
Frequency stability:	limited by reference oscillator
Frequency repeatability:	limited by reference oscillator
Absolute frequency accuracy:	<3 Hz + reference oscillator error
Reference input:	10 MHz, 10 dBm, SMA
Typical phase noise	See graph below
Interface:	USB control by ASCII text commands to FTDI chip. Open source code provided for Labview 7.0
Size:	L x W x H: ~3.5 x 2.875 x 1.25” excluding connectors
DC Power:	+15 V ~3 A, -5 V ~30 mA

phase graph

FREQUENCY COUNTER

freqctr

VDI周波数カウンターはVDI周波数エクステンダーを駆動する基本周波数を測定するために設計されました。不要な機能、余分なサイズとコストを削減するために設計は合理化されています。入力パワーが0〜10 dBmの場合、周波数範囲は0.5〜20 GHzです。ディスプレイの解像度は7桁ですが32ビットの解像度はPCに接続されたUSBケーブルを介して読み取ることができます。測定時間は100 ms以内の4 kHzなど、適度な相対精度で高速測定を行うように設定できます。ユニットは小型（3.75 x 2.5 x 1.6インチ）で、電源または壁のプラグを必要とせずにコンピューターに接続されたUSBケーブルを介して電力を供給されます。ほとんどのプログラミング言語で使用できるソフトウェアドライバーが提供され、ユーザーインターフェースのオープンソースコードもLabview 7.0で提供されます。

VDI Frequency Counter Data Sheet
Bandwidth:	0.5-20 GHz, SMA
Input power:	0-10 dBm
Resolution:	7 digits display, 32 bits through USB
Absolute accuracy:	<30 kHz
Relative accuracy:	384/(measurement time (s)) (Hz) + internal clock drift Ex. 100 ms gives 3.96 kHz measurement
Measurement time:	Selectable from 0.4 ms to 26 s, read through USB every 1 ms
Display Calibration Factor:	7 significant digits
Input impedance	50 ohm
Interface:	USB control with software for Windows XP. Labview runtime engine 7.0 will be installed. Dynamic link libraries supplied for use with programming languages. Open source code provided for Labview 7.0.
Size:	L x W x H, 3.75 x 2.5 x 1.6"
Current consumption:	200 mA

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