SHF Communication Technologies AG
Wilhelm-von-Siemens-Str. 23D • 12277 Berlin • Germany
Phone +49 30 772051-0 • Fax +49 30 7531078
E-Mail: sales@shf-communication.com • Web: www.shf-communication.com

Datasheet
SHF C704 A50 GHz / 64 Gbps
4:1 RF Switch

SHF reserves the right to change specifications and design without notice – SHF C704 A - V002 – December 2, 2020 Page 1/14

Description
The SHF C704 A is a 4:1 broadband RF switch, operating form 100 kHz up to 50 GHz for clock signal, andup to 64 Gbps for NRZ Data signal. It offers high quality output signals together with a compact size andease of operation.
The switch is fully independent RF building block housed in a single chassis, as indicated by the block
diagram below, and operated by a single software. It operates in both directions, i.e. the signal can beapplied to or taken from the common (COM) port.

Features








Broadband operation up to 50 GHz
Up to 64 Gbps NRZ Data signal
Bi-directional
Low power consumption
Single-ended operation
USB interface
Simple, easy to use GUI1
Automated measurements by using different software environments easily possible

Applications
Broadband test and measurement equipment

Block Diagram

1To operate the switch, intuitive and well documented plain text commands are sent and received via USB. Thus the device can be
operated either by the complementary software or automated by any programming language which can communicate with USB devices.
SHF reserves the right to change specifications and design without notice – SHF C704 A - V002 – December 2, 2020 Page 2/14

Accessories
 Functional earth cable Mini-USB cableOptions
Option – Low Frequency Compensation (LFC)
The Low Frequency Compensation option is offered in order to reduce the frequency response roll-off. Due toa lower loss at the lower frequencies there is a typical role-off of 7 dB between 1 MHz and 50 GHz. The
compensation reduces the roll-off to approximately 4 dB over the frequency range, but at the same timeincreases the insertion loss by roughly 3 dB at the lower frequency range.

SHF reserves the right to change specifications and design without notice – SHF C704 A - V002 – December 2, 2020 Page 3/14

Absolute Maximum Ratings
ParameterUnitSymbol

Input PowerdBm

Pin

External DC Voltage on
RF Ports

V

VDCext

Min.

Typ.

Max.

Comment

Input Parameters23-6+6

AC coupled ports

Max.

Comment100

Clock Signal

Specifications – SHF C704 A
Parameter

Unit

SymbolMinimum Input Frequency

kHzfminMaximum Input Frequency

GHz

fmax

Bandwidth

GHz

f3dB
f6dB

Data Rate

Gbps

Min.

Typ.

Performance

Insertion Loss

50

Clock Signal
3442

Clock Signal

64

Data Signal
2.5
468dB

35.5
79

< 25 GHz
25 - 34 GHz
34 - 40 GHz
40 - 50 GHz

Isolation

dB

2540

< 50 GHz

Return LossdB510< 50 GHz, RF 1/2/3/4

Return LossdB4

10< 50 GHz, Common

Settling Timems

Switching Transient
Overshoot2mV

1±300

Output Parameters
3

Jitter RMS

fsJRMSSee note

Duty Cycle%

DCSee note32

Switching Transient Overshoot refers to a voltage overshoot measured on the module’s ports while toggling the switch3

No degradation in jitter or duty cycle performance were observed for sine wave signals

SHF reserves the right to change specifications and design without notice – SHF C704 A - V002 – December 2, 2020 Page 4/14

Parameter

Unit

SymbolMin.

Typ.

Max.

Comment

Supply Voltage

VVcc+4.40+5.00+5.25

Mini USB

Supply CurrentmA

Icc

70

Power DissipationmW

Pd

350

@ VCC = +5 V

Power Requirement

Mechanical Characteristics
RF1

Ω

50

1.85 mm (V) female

RF2

Ω

50

1.85 mm (V) female

RF3

Ω

50

1.85 mm (V) female

RF4

Ω

50

1.85 mm (V) female

COMΩ

50

1.85 mm (V) female

Dimensions

mmWeightg

See Outline Drawing
90

Conditions
Operating Temperature°C

Tambient

1535

Specifications – SHF C704 A Option LFC
Parameter

Unit

Symbol

Min.

Typ.

Max.

Comment

BandwidthGHz

f3dBf6dB

Insertion LossdB

Return Loss

dB

510

< 50 GHz, RF 1/2/3/4

Return Loss

dB

410

< 50 GHz, CommonPerformance40> 5048Clock Signal6.510< 38 GHz
38 - 50 GHz

SHF reserves the right to change specifications and design without notice – SHF C704 A - V002 – December 2, 2020 Page 5/14

Typical RF Performance @ +25°C
C704 A (no option)
The measurements below had been performed using a VNA.

S21Isolation

SHF reserves the right to change specifications and design without notice – SHF C704 A - V002 – December 2, 2020 Page 6/14

Return Loss (RF1 – 4)

Return Loss (COM)SHF reserves the right to change specifications and design without notice – SHF C704 A - V002 – December 2, 2020 Page 7/14

C704 A (option LFC)
The measurements below had been performed using a VNA.

Insertion Loss – LFC compared to “no Option”

Insertion LossSHF reserves the right to change specifications and design without notice – SHF C704 A - V002 – December 2, 2020 Page 8/14

Return Loss (RF1 – 4)

Return Loss (COM)SHF reserves the right to change specifications and design without notice – SHF C704 A - V002 – December 2, 2020 Page 9/14

Isolation

SHF reserves the right to change specifications and design without notice – SHF C704 A - V002 – December 2, 2020 Page 10/14

Typical Output Waveforms
Clock Output Signals
The measurements below had been performed using an Anritsu signal generator (3697C) and an Agilent
Digital Communication Analyzer (DCA) with a Precision Timebase Module (86107A) and a 70 GHz
Sampling Module (86118A). The outputs of the Switch module had been connected directly to the DCA
input. Input power of the clock signal is 0 dBm (630 mVpp).

5 GHz input signal

5 GHz output signal

50 GHz input signal

50 GHz output signal

SHF reserves the right to change specifications and design without notice – SHF C704 A - V002 – December 2, 2020 Page 11/14

Data Output Signals
31

The measurements below had been performed using a SHF 12105 A Bit Pattern Generator (PRBS 2 -1)
and an Agilent Digital Communication Analyzer (DCA) with a Precision Timebase Module (86107A) and a
70 GHz Sampling Module (86118A). The outputs of the Switch module had been connected directly to the31
DCA input. Input Data amplitude is ~630 mVpp, and it is a PRBS 2 -1 signal.

50 Gbps input signal

50 Gbps output signal

50 Gbps output signal – Option LFC

SHF reserves the right to change specifications and design without notice – SHF C704 A - V002 – December 2, 2020 Page 12/14

64 Gbps input signal

64 Gbps output signal

64 Gbps output signal – Option LFC

SHF reserves the right to change specifications and design without notice – SHF C704 A - V002 – December 2, 2020 Page 13/14

Outline Drawing – Moduleabc

Ø2.24034284xØ2.713.6

12.4

1COMRF 42RF 1

54:1 SW

RF 3RF 23

SHF C704 A354554514535

44:1 RF SwitchXXXXX

SHFCommunication
Technologies AG3USB

23.5Connector

1COM

1.85mm (V) female

2RF 1

1.85mm (V) female

3RF 2

1.85mm (V) female

4RF 3

1.85mm (V) female

5RF 4

1.85mm (V) female

6.4

6.4
25

13.6

Port

13.6Pos

All dimensions are in mmPortConnector

aMini-USB

bncc

Functional earth (FE)SHF reserves the right to change specifications and design without notice – SHF C704 A - V002 – December 2, 2020 Page 14/14