SDC-C Series Microwave Downconverter

Overview Specifications Ordering Resources

SDC-C Series Microwave downconverter is a broadband frequency converter that is dedicated for satellite communication. It has a high performance, high reliability and an octave covered by RF signal. Its frequency step is precise and accurate to 1Hz with a variety of IF and signal bandwidth choices. SDC-C series is equipped with functions like self-testing and combination alarm which is suitable for long-time uninterrupted use, guaranteed safety and reliability.

SDC-C series microwave downconverter is mainly designed for satellite communication system, signal monitoring system, and electronic countermeasure system with an excellent phase noise, clutter suppression, and in-band flatness data. It is able to 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-C series microwave downconverter has a standard 2U size.

Applications: T&M Systems / Satellite Communications / MIMO

Key Features

Octave RF coverage (S, C, X, Ku, and Ka)

2GHz or above instantaneous signal bandwidth

Amplitude equalization and group delay equalization

Variety of commonly used IF and bandwidth combinations

Excellent phase noise specification (40GHz): ≤-100dBc/Hz@10KHz

Internal and external reference switching

Remote programming

Self-testing and combination alarm

1. Input
Frequency Range	SDC0204C: 2GHz – 4GHz, SDC0408C: 4GHz – 8GHz, SDC0818C: 8GHz – 18GHz, SDC1826C: 18GHz – 26.5GHz, SDC2640C: 26.5GHz – 40GHz, SDC1840C: 18GHz – 40GHz
Frequency Tuning Step Size	1Hz
Maximum Power Input	-30dBm(Operating), +10dBm(Damaged) (+5dBm operating, ATT35 support)
Input LO Leakage	≤-80dBm
Input VSWR	SDC0204C/SDC0408C: ≤1.4, SDC0818C/SDC1826C/SDC2640C: ≤1.5, SDC1840C: ≤2.2
Input Impedance	50Ω

2. Output
Input Frequency	70±20MHz, 140±40MHz, 0.72±0.25GHz, 1.2±0.25GHz, 1.2±0.5GHz, 1.8±1GHz (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
IF Signal Monitoring	-20dBc (typ.)

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, ≤±2dB/Full Band
Group Delay	Linear: ≤0.03ns/MHz, Parabola: ≤0.01ns/MHz², Jitter: ≤1ns
AM/PM Conversion	≤0.1º/dB (Maximum gain, 0dBm output)
Spectral Characteristics	Non-inverted
RF Shutdown Feature	≥ 80dB
Image Rejection	≤-70dBc
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 Output Port	2.92mm-K
IF Output Port	SMA-K
Monitoring IF 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	483 × 90× 550 mm (2U)
Weight	15kg
	(Note: see more detail information in the ‘Resource’ – ‘Datasheet’)

Main Machine

Module No.	Item	Description
SDC0204C	Microwave Downconverter	RF input frequency range: 2 GHz to 4 GHz
SDC0408C	Microwave Downconverter	RF input frequency range: 4 GHz to 8 GHz
SDC0818C	Microwave Downconverter	RF input frequency range: 8 GHz to 18 GHz
SDC1826C	Microwave Downconverter	RF input frequency range: 18 GHz to 26.5 GHz
SDC2640C	Microwave Downconverter	RF input frequency range: 26.5 GHz to 40 GHz
SDC1840C	Microwave Downconverter	RF input frequency range: 18 GHz to 40 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-ATT35	ATT35 Option	Maximum input of signal power increased from -30dBm to +5dBm
SDC-ST	Self-Testing and Combination Alarm	Suitable for long-time uninterrupted use