SDC-A Series Multi-Octave Downconverter

Overview Specifications Ordering Resources

SDC-A Series Multi-Octave Downconverter belongs to our microwave upconverter series that has a high performance and an octave overage by RF signal. Its frequency step is precise and accurate to 10Hz with a variety of IF and signal bandwidth choices.

This series of converters is mainly used for electronic countermeasure system, radar system, and satellite communication system. Its excellent phase noise, clutter suppression, and in-band flatness data can provide a transparent RF transmission channel to all videos or data communications. All programming commands can be set through a local panel or through network remotely. SDC-A series microwave downconverter is available in 2U/ 4U sizes.

Applications: T&M Systems / Satellite Communications / MIMO / Radar System

Key Features

Multi-octave RF coverage (0.5GHz to 67GHz)

4GHz or above instantaneous signal bandwidth

Amplitude equalization and group delay equalization

Variety of commonly used IF and bandwidth combinations

Excellent phase noise specification (67GHz): ≤-100dBc/Hz@10KHz

Internal and external reference switching

Remote programming

1. Input
Frequency Range	0.5GHz – 20GHz / 26.5GHz /40GHz / 50GHz / 67GHz
Frequency Tuning Step Size	10Hz
Maximum Input of Signal Power	-30dBm (operating), +10dBm (damaged) (+5dBm operating, ATT35 support)
Input LO Leakage	≤-80dBm
Input VSWR	≤2.5
Output Impedance	50Ω

2. Output
Output Frequency	70±20MHz, 140±40MHz, 0.72±0.25GHz, 1.2±0.25GHz, 1.2±0.5GHz, 1.8±1GHz, 3±2GHz (select between single or multiple IF inputs)
P-1 Output Power	≥ +13dBm
IM3 Output	≤-60dBc (△5MHz, Maximum gain, Power output:2*-10dBm)
Output VSWR	≤1.4
Output Impedance	50Ω

3. Transfer
Gain	10-45dB
Tuning Step Size	0.1dB
Gain Resolution	≤±1dB
Level Stability	≤±0.5dB/day at room temperature
Gain Flatness	≤±0.3dB/40MHz, ≤±0.5dB/80MHz, ≤±1dB/500MHz, ≤±1.5dB/1000MHz, ≤± 2dB/2000MHz, ≤±3dB/4000MHz, ≤±2dB/Full Band
Inband Frequency Clutter	≤-55dBc (excluding output harmonics)
RF Shutdown Feature	≥ 80dB
Noise Figure (Max. Gain)	• SDC20A: ≤12dB • SDC26A: ≤15dB • SDC40A/SDC50A/SDC67A: ≤18dB
Phase Noise	Check the detailed specifications in the datasheet

4. Reference
Internal Reference Frequency Stability	±2e-8 (0℃ to +50℃, after 30min power on)
Internal Reference Frequency Accuracy	0.05ppm
Internal Reference Power Output	5±2dBm, 50Ω, 10MHz, Sine wave
External Reference Power Input	5±2dBm, 50Ω, 10MHz, Sine wave
Reference Phase Noise	≤-125dBc/Hz@10Hz, ≤-140dBc/Hz@100Hz, ≤-150dBc/Hz@1kHz, ≤-155dBc/Hz@10kHz, ≤-155dBc/Hz@100kHz

5. General
RF Input Port	• SDC20A/SDC26A/SDC40A: 2.92mm-K • SDC50A: 2.4mm-K • SDC67A: 1.85mm-K
IF Output Port	SMA-K
I/Q Output Port	SMA-K
External Reference Input Port	BNC female
Internal Reference Output Port	BNC female
Control Interface	RJ-45 (TCP/IP over Ethernet) / RS422
Dimension	• SDC20A: 483 × 90× 550 mm (2U) • SDC26A/SDC40A/SDC50A/SDC67A: 483 × 180 × 550 mm (4U)
Weight	• SDC20A: 15kg • SDC26A/SDC40A/SDC50A/SDC67A: 25kg
	(Note: see more detail information in the ‘Resource’ – ‘Datasheet’)

Main Machine

Module No.	Item	Description
SDC20A	Multi-Octave Downconverter	RF input frequency range: 0.5 GHz to 20 GHz
SDC26A	Multi-Octave Downconverter	RF input frequency range: 0.5 GHz to 26.5 GHz
SDC40A	Multi-Octave Downconverter	RF input frequency range: 0.5 GHz to 40 GHz
SDC50A	Multi-Octave Downconverter	RF input frequency range: 0.5 GHz to 50 GHz
SDC67A	Multi-Octave Downconverter	RF input frequency range: 0.5 GHz to 67 GHz

Options

Module No.	Item	Description
SDC-MA	IF/BW IF/Bandwidth Option	IF output frequency range: 70±20 MHz
SDC-MB	IF/BW IF/Bandwidth Option	IF output frequency range: 140±40 MHz
SDC-MC	IF/BW IF/Bandwidth Option	IF output frequency range: 0.72±0.25 GHz
SDC-MD	IF/BW IF/Bandwidth Option	IF output frequency range: 1.2±0.25 GHz
SDC-ME	IF/BW IF/Bandwidth Option	IF output frequency range: 1.2±0.5 GHz
SDC-MF	IF/BW IF/Bandwidth Option	IF output frequency range: 1.8±1 GHz
SDC-MG	IF/BW IF/Bandwidth Option	IF output frequency range: 3±2 GHz
SDC-IQ	IQ Baseband Output Option	IQ baseband output
SDC-ATT35	ATT35 Option	Maximum input of signal power increased from -30dBm to +5dBm