Active Digital Modules

SHF provides a wide range of high performance digital high speed modules suitable for the use in telecommunication systems and test and measurement setups e.g. for SONET OC-768 / SDHSTM-256, 100 GbE, 400 GbE or Fibre Channel.

Raising the speed (up to 120 Gbps serial)

Our multiplexers (MUX) and demultiplexers (DEMUX) offer broadband operation up to 120 Gbps with adjustable output amplitude and eye symmetry.

Raising the number of levels (digital-to-analog converters up to 60 GBaud)

Our digital-to-analog converters (DAC) operate at baud rates up to 32 or 60 GBaud. Up to six single-ended serial data streams are converted into one differential multi-level signal. This makes the SHF DAC an ideal electrical signal source e.g. for PAM or QAM applications. Together with one of our our programmable BPGs (Bit Pattern Generators) a high speed “remote head” AWG (Arbitrary Waveform Generator) is formed.

Raising the speed and the number of levels (PAM4 Multiplexer up to 128 GBaud)

Our PAM4 multiplexer take four binary input data streams, re-time, reshape the signals and multiplex each two to a binary signal of double the speed. Inside the module a two bit DAC converts these two extremely high speed signals to a four level signal.

Tailor it to the needs

The needs of our customers are different; therefore SHF is happy to offer customization to specific applications. A small selection of such assemblies based on our standard product offerings can be found in the customized assemblies subsection.

Multiplexers (Mux) & Demultiplexers (Demux)

P/NTypeInput Data
Rate Range
Output Data
Rate Range
Max. Output
Amplitude (typ.)
SHF 601 A2:1 Mux1… 30 Gbps2… 60 Gbps0.63 V single-ended
1.26 V differential
SHF 602 B4:1 Mux1.5… 15 Gbps6… 60 Gbps0.55 V single-ended
1.1 V differential
SHF C603 A2:1 Mux2… 60 Gbps4… 120 Gbps0.4 V single-ended
0.8 V differential
SHF 604 A2:1 Power Mux2… 40 Gbps4… 80 Gbps1.4 V single-ended
2.8 V differential
SHF 621 A1:2 Demux2… 60 Gbps1… 30 Gbps0.4 V single-ended
SHF C623 A1:2 Demux10… 120 Gbps5… 60 Gbps0.4 V single-ended

Digital-to-Analog Converters (DAC)

P/NTypeInputOutputOutput Amplitude
(typ., FS*)
SHF 611 F3-Bit DAC1… 32 Gbps
at 2 or 3 inputs
1… 32 GBaud
4 or 8 levels
0.65 V single-ended
1.3 V differential
SHF 612 A4-Bit DAC1… 32 Gbps
at 2, 3 or 4 inputs
1… 32 GBaud
4, 8 or 16 levels
0.65 V single-ended
1.3 V differential
SHF 613 A3-Bit DAC1… 60 Gbps
at 2 or 3 inputs
1… 60 GBaud
4 or 8 levels
0.65 V single-ended
1.3 V differential
SHF 614 C6-Bit DAC1… 60 Gbps
at 2 to 6 inputs
1… 60 GBaud
4 to 64 levels
1.3 V single-ended
2.6 V differential
SHF 615 B3-Bit Power DAC1… 60 Gbps
at 2 or 3 inputs
1… 60 GBaud
4 or 8 levels
2.4 V single-ended
4.8 V differential

* FS: Full Scale i.e. maximum output with all input channels active. Output voltage can be reduced by software or by applying less input channels.

PAM-MUX & PAM-Sampler

SHF 616 BPAM4 Multiplexer1… 64 Gbps binary
(at 4 inputs)
2… 128 GBaud PAM4
(4… 256 Gbps PAM4)
SHF 11220 APAM4 Sampler30… 58 GBaud PAM4
(60… 116 Gbps PAM4)
30… 58 Gbps binary