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



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

Warranty Period (Years): 3 RoHS-compliant
  • 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




Product Description

Each distribution module has one input and 12 or 24 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, 10 MHz or unmodulated IRIG (IRIG DCLS). A single 1PPS or 10 MHz output from your GNSS receiver or frequency standard is buffered and multiplied to 12x or 24x 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 capability.

FO


The FO module can multiply an optical multi mode signal like 1PPS, 10 MHz or IRIG DCLS to 12x or 24x 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: 3µs
TCB: 2µs
FO: rise: 45ns, fall: 45ns
Output signal TTL Module
12 (24) x TTL (2.5 V at 50 Ohm), common GND for all outputs, BNC connector

TCM Module
12 (24) x IRIG A/B modulated (3 Vpp [MARK], 1Vpp [SPACE] 50 Ohm) common GND for all outputs, BNC connector

TCB Module
12 (24) x IRIG modulated (AM) balanced (2 Vpp at 600 Ohm) with isolated BNC connectors

FO Modul
12 (24) x fiber optic outputs (850nm multi mode) with ST connectors

Operating Voltage 85-264VAC (50/60Hz)
Form Factor 19'' aluminium case (1U) Schroff Multipac
Power Supply Unit Standard PSU:
85 ... 264VAC, 47 ... 63Hz
Several other power supply units (even for DC power supply) are available upon request.
Physical Dimensions 485mm x 45mm x 305mm
Supported Temperature Operational: 0 - 50 °C (32 - 122 °F)
Storage: -20 - 70 °C (-4 - 158 °F)
Supported Humidity Max. 85 % (non-condensing) at 40 °C
Technical Support Meinberg offers free lifetime technical support via telephone or e-mail.
Warranty Three-year warranty
RoHS Status of Product This product is fully RoHS-compliant.
WEEE Status of Product This product is handled as a B2B (Business to Business) category product. To ensure that the product is disposed of in a WEEE-compliant fashion, it can be returned to the manufacturer. Any transportation expenses for returning this product (at end-of-life) must be covered by the end user, while Meinberg will bear the costs for the waste disposal itself.


Downloads

Short Info Sheet



Manuals


Please note that only the most recent manual version is available for download. This manual therefore may not be suitable for all product versions.
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