Signal Distribution

Time & Frequency Distribution
TFD-100 series

Modular Time & Frequency Distribution/Generating Unit

The TFD-100 series is a 1U, rack 19″ mount, modular time and frequency distribution unit. It provides the precise distribution of any frequency from 1PPS up to 10MHz include most popular standards: 1PPS (TTL), IRIG-DCLS (TTL/RS-422), 10MHz (TTL and Sine).

You can order the following base modules that differ in power supply:

  1. TFD-101 – single 85-265VAC/100-370VDC power supply
  2. TFD-102 – dual, redundant 85-265VAC/100-370VDC power supplies
  3. TFD-110 – single 48VDC (36-75VDC) power supply
  4. TFD-120 – dual, redundant 48VDC (36-75VDC) power supplies
  5. TFD-111 – dual, redundant 85-265VAC/100-370VDC and 48VDC (36-75VDC) power supplies
Power supply options

Available input modules:

  1. TFM-1012 – two digital inputs (level TTL/50Ω) for 1PPS and 10MHz. Input sockets: BNC or SMA.
  2. TFM-1022 – two switched, analog 10MHz (8 dBm) inputs for frequency distribution. Input sockets: BNC or SMA.
  3. TFM-1032* – two switched, digital, differential (standard RS422/RS485@100Ω) inputs for IRIG-B002/003. Input sockets: Terminal Block (3.5 mm)
  4. TFM-1033* – IRIG-B inputs, one TTL@50Ω IRIG-B002/003, one RS-422/485@100Ω IRIG-B002/003, one IRIG-B122/123 (Analog)
  5. TFM-1042* – two switched, digital fiber-optics inputs for 1PPS, IRIG-DCLS, 10MHz signals. Transmission over a distance up to 2.5 km. Input sockets: ST, SC or FC.

*) available on request

Available time & frequency modules:

  1. TFM-2000* – GPS/GLONAS/Beidou disciplined TCXO precise time and frequency source. It provides 1PPS, 10MHz TTL signals and ToD (NMEA serial).
  2. TFM-2001* – External signal disciplined OCXO precise 10 MHz frequency source. It provides 1PPS (external input),  10MHz sine (internal oscilator), 10MHz TTL (internal/external source). It synchronizes to a 10MHz TTL external signal.
  3. TFM-2010* – GPS/GLONAS/Beidou network time server (NTP, PTP). Includes high quality TCXO or OCXO  10MHz frequency source synchronized to GPS.
  4. TFM-2020* – PTP Slave, high precise time/frequency source module.
  5. TFM-2030* – DCF77 /IRIG-B generator with analog, FO and TTL outputs. It generates  DCF77 or IRIG-B signals for various range of clock devices

*) available on request

TFD-100 Modules demo

Available output modules:

  1. TFM-1114 – four digital outputs module (TTL @50Ω) for 1PPS, IRIG-DCLS, 10MHz. Output sockets: BNC or SMA
  2. TFM-1124 – four analog 10MHz sinus (8dBm @ 50Ω) outputs module. Output sockets: BNC or SMA
  3. TFM-1134* – four digital (RS422/RS485 standard)  outputs module for IRIG-DCLS. Output sockets: Terminal Block 3.5 mm
  4. TFM-1144* – four digital fiber-optics outputs module for 1PPS, IRIG-DCLS, 10MHz. Transmission over a distance up to 2.5 km. Output sockets: ST, SC or FC

*) available on request

Available distributor modules:

  1. TFM-1218 – high precision 1/8 digital distribution module (TTL @50Ω) for 1PPS, IRIG-DCLS, 10MHz. 1x input, 8x output.  Sockets: BNC (TFM-1218BNC) or SMA (TFM1218SMA).
  2. TFM-1228 – 1/8 analog 10MHz sinus (8dBm @ 50Ω) distribution module. 1x input, 8x output. Sockets: BNC (TFM-1228BNC) or SMA (TFM1228SMA).

Key features:

  • 1PPS signal (TTL/FO) distribution
  • 10MHz (TTL/Sine) distribution
  • IRIG-DCLS (TTL/RS422/RS485/FO) distribution
  • BNC or SMA sockets
  • Redundant power supply 230VAC or/and 48VDC

Technical Specification


TFD-100  – Modular Time & Frequency distribution unit


1PPS (TTL), 10 MHz (Sin), 10MHz (TTL), IRIG-DCLS (TTL), IRIG-DCLS (RS422RS485), FO fiber optic


1PPS (TTL), 10 MHz (Sin), 10MHz (TTL), IRIG-DCLS (TTL), IRIG-DCLS (RS422/RS485), FO fiber optic


0 up to 10 MHz *

Input/Output impedance

50 Ω or 100 Ω *

Input/output connectors

BNC or SMA or Terminal Block 3.5 mm

Rise time

2 – 20ns *

Fall time

2 – 20ns *

Ambient temperature

0°C to 50°C


0-95% non-condensed

Power supply

Single or redundant, 85…264V AC, 100…370V DC or 48VDC (36 to75VDC)


483 mm (W) x 45mm (H) x 330 mm (B) – 19 inch rack mount


3 – 3.5 kg (depends on number of modules)


IEC61010-1:2010, IEC61850

Technical support

Elproma offers free lifetime technical support via email or phone.


Three-Year Warranty


EN61326-1 (2006) EMC
• Requirements for Measurement Control
and Laboratory Equipment, Class A
• EN61000-3-2 (2006) +A1+A2 Harmonic
Current Emissions
• EN61000-3-3 (2008) Voltage Fluctuation
and Flicker Emissions

*) depends on type of module