SDU: Signal Distribution Unit for TTL Level Signals like PPS, 10MHz and for IRIG AM

Solutions for Time and Frequency Synchronization

Products	Support	Downloads	About Meinberg	Contact	Search
by Application		by Time Source	by Form Factor	Time Server	Product Archive

SDU : Signal Distribution Unit for PPS, 10MHz and IRIG Signals

Image Zoom
Meinberg SDU devices are the simplest and most convenient way to add more buffered timing signal outputs to your distribution rack. The SDU base chassis can be ordered with one or two distribution modules, each providing twelve additional IRIG AM, DCLS, or fiber optic signals.

Key Features

Maximum of 24 outputs in a 1U chassis (2x 1:12 distribution)
Status LEDs
Suitable for modulated (AM) and/or unmodulated (DCLS) IRIG signals
One or two distribution modules
Compact 1U housing, even in 24 port version
2 years warranty

Description

Each distribution module has one input and 12 buffered outputs plus an alarm relay to signal a missing input signal or an internal error. The SDU chassis fits in 19" racks and is available with both AC and DC power supply options.

The alarm relay contact and the status LEDs in the front panel indicate to the operator whether an input signal or an internal error has been detected that could affect the output signal.

The following distribution modules are currently available, and either one, or any two of them may be combined together in a single SDU:

TTL

The TTL Module handles TTL signals like 1PPS, 10MHZ or unmodulated IRIG (IRIG DCLS). A single 1PPS or 10MHz output from your GPS receiver or frequency standard is buffered and multiplied to 12 outputs without any modification to your signal source.

TCM

The TCM module provides 12 IRIG AM outputs from a single IRIG input source. The integral automatic gain control (AGC) feature of the TCM allows you to cascade several SDUs for virtually unlimited expansion capabilit.

TCB

The TCB module has been designed to provide 12 balanced IRIG AM signal outputs. (The difference between the TCM and TCB modules is that the TCB distributes balanced signals.)

FO

The FO module can multiply an optical multi mode signal like 1PPS, 10MHz or IRIG DCLS to twelve FO outputs. An option is available for a TTL signal input instead of the FO input.

Characteristics

Input signal:	TTL Module TTL signal (PPS, 10MHz, ...) TCM Module IRIG A/B modulated (AM) TCB Module IRIG A/B modulated (AM) FO Module Fiber optic signal, 850nm multi mode (PPS, IRIG-DCLS, 10MHz, ...) optional: TTL input via BNC connector
Signal Delay:	TTL: 24ns TCM: 3us TCB: 2us FO: rise: 70ns, fall: 90ns
Output signal:	TTL Module 12 x TTL (2.5Vat 50Ohm), common GND for all outputs, BNC connector TCM Module 12 x IRIG A/B modulated (3Vpp [MARK], 1Vpp [SPACE] 50Ohm) common GND for all outputs, BNC connector TCB Module 12 x IRIG modulated (AM) balanced (2Vpp bei 600 Ohm) with isolated BNC connectos FO Modul 12 x fiber optic outputs (850nm multi mode) with ST connectors
Physical dimensions:	485mm x 45mm x 305mm
Power supply:	85-264VAC (50/60Hz)
Power Supply Unit:	Standard PSU: 85 ... 264VAC, 47 ... 63Hz Several other power supply units (even for DC power supply) are available upon request.
Form Factor:	19'' aluminium case (1U) Schroff Multipac
Ambient temperature:	0 ... 50°C / 32 ... 122°F
Humidity:	Max. 85%
Technical Support:	Meinberg offers free lifetime technical support via telephone or e-mail.
Warranty:	Two-Year Warranty
RoHS-Status of the product:	This product is fully RoHS compliant
WEEE status of the product:	This product is handled as a B2B category product. In order to secure a WEEE compliant waste disposal it has to be returned to the manufacturer. Any transportation expenses for returning this product (at its end of life) have to be incurred by the end user, whereas Meinberg will bear the costs for the waste disposal itself.