DA1-100-10-FO - Precision Test Systems
DA1-100-10-FO: 1 MHz -100 MHz Wide Band,
Fiber Optic / Coaxial Distribution Amplifier
Key Features
Combination of fiber optic and coaxial inputs and outputs. Designed to customers requirements.
1 -100 MHz Wideband Operation, or narrow bands such as 5 MHz, 10 MHz etc. Options to 200 MHz.
1U or 2U 19” rack mounted case depending upon number of outputs. Up to 40 outputs possible.
Coaxial Inputs and Outputs
Each output can be independently set to 0 dBm to > +13 dBm
(optional higher levels available)
AGC Level Controlled. Output level remains stable to 0.02 dB
even if input varies from +7 to +20 dBm.
Alarm monitoring. All outputs have alarm monitoring.
Indication by LEDS or rear panel DC outputs.
Ultra low phase noise. Typically -134 dBc @ 1 Hz offset.
Standard floor noise typically -165 dBc/Hz with options to -171
dBc/Hz (10 kHz offset).
90 dB channel isolation and 130 dB reverse isolation. Protects
reference input and prevents cross-talk.
Optional second frequency “Back-up” input. Automatically
switched in, if first input fails.
Optional internal back-up oscillator. Automatically switched in,
if external input fails.
Optional Redundancy (two units with automatic switchover)
Many other options and customized options.
Fiber Optic Inputs and Outputs
Optical input: FC/APC connector
Flexible number of outputs
Transmission distances up to 50 km
Wide range of gain options
Laser type: DFB
Optical Wavelength 1310 nm
Optical power output 4.5 dBm
Optical Connector: FC/APC
General Description
The DA1-100-10-FP is a wide band distribution amplifier combining optical and coaxial distribution amplifiers. The
frequency bandwidth is wideband from 1 MHz to 100 MHz (usable to > 150 MHz), or narrow bands can be designed. It
can be used to synchronize up to forty instruments to a frequency reference input. The reference input will typically be an
OXCO, Rubidium, Cesium or Hydrogen Maser Frequency Standard. Typical frequencies are 5 and 10 MHz, but any
frequency from 1 MHz to >100 MHz can be used.
DA1-100-10-FO Brochure. © Precision Test Systems Ltd 2016
The input can be coaxial or optical. For a coaxial input, either coaxial or optical outputs are available. For an optical
input again the outputs can either be optical or coaxial.
The DA1-100-10-FO has features not found in any competitive unit. This makes the DA1-100-10-FO the industries
leading distribution amplifier. The DA1-100-10-FO has outstanding phase noise on its coaxial inputs and outputs.
Therefore the DA1-100-10-FO will not add any noise to the reference input.
The coaxial phase noise is typically <-134 dBc @ 1 Hz. This low phase noise enables units to be cascaded for over 1000
Amplifier with Gain and Automatic Gain Control (AGC)
Unlike most competitive units, the DA1-100-10-FO accepts coaxial inputs from +7 dBm to +20 dBm (-20 dBm to +30
dBm optional) and provides outputs from 0 dBm to > +13 dBm (up to +20 dBm optional). The output will not vary with
input variations. This is very useful when long cable runs are being used or equipment has different input level
requirements. The AGC can be disabled, if required, making the unit a fixed gain amplifier. Different gains are
available upon request.
Inputs and Outputs
The number of outputs and the combination of optical or coaxial can be specified by the customer before the unit is
manufactured. E.g a typical combination is one coaxial input and one optical input with five coaxial outputs and five
optical outputs.
Each output is completely isolated from the input and each other. Therefore, the reference oscillator connected to the
DA1-100-10-FO’s input is protected against load variations, short circuits etc. that may be applied to the outputs.
Channel to channel isolation is > 90 dB at 10 MHz and > 65 dB at 100 MHz. Output to input isolation is > 130 dB at 10
MHz and > 100 dB at 100 MHz.
Each coaxial output port can be independently set to any level from 0 to > +13 dBm on the standard unit and outputs to
+20 dBm are optional available. The ability to set every output to a different level is very useful when dealing with
equipment that has different input level ranges. Over 1000 outputs can be obtained without any significant increase in
close-in noise.
Phase Noise
The DA1-100-10-FO has very low phase noise. This enables units to be connected in series without adding any
appreciable noise to the reference input. With only three DA1-100-10’s in series, up to 1000 outputs can be derived from
one input.
A typical plot of phase noise for the coaxial inputs and outputs is shown below. The blue line is the DA1-100-10-FO’s
specifications. The light blue lines are line related, spurious outputs. These spurs (50 or 60 Hz) are present in any
equipment connected to the AC 115 or 230 VAC supply. The black line is the actual phase noise. The far out noise
(offsets > 1 kHz) can even be improved upon by careful selection of the output level and amplifier gain. Floor noise to
-171 dBc/Hz is achievable.
DA1-100-10-FO Brochure. © Precision Test Systems Ltd 2016
Phase Stable with matched outputs
The wide frequency bandwidth allows the outputs to have stable phase. The phase stability is typically 5 ps/°C. Also the
delay match between outputs is better than 2.2 ns overall and typically less than 350 ps between groups of five outputs.
Every output has alarm monitoring. Should the RF level drop on any output, an alarm will be raised. Also, front panel
LED’s shows the status of the alarms. The alarm signals are also available on the rear panel.
The DA1-100-10-FO Distribution Amplifier is ideal for use in calibration or standard laboratories, space research,
satellite systems, communication systems or anywhere where ultimate performance is needed.
Miscellaneous Information
The DA1-100-10-FO is a highly reliable unit. The DA1-100-10-FO is housed in a fully screened 19” rack mount case
and operates from a 100 to 240 VAC supply (usable 90 to 260 VAC). The DA1-100-10-FO is CE marked for sale within
the EEC.
Options and Other Amplifiers available from Precision Test Systems
Fully DC isolated inputs and outputs. Useful in preventing ground loops on long cable runs.
Squarewave outputs. Either at the same frequency as the input, or at different frequencies.
Multiplied or divided outputs. E.g. 10 MHz, input with 5 MHz output. 10 MHz input with 100 MHz output. Any
type of multiplication / division can be incorporated.
Low pass filter on outputs. This reduces the harmonic output.
Guaranteed phase noise specifications. Measured phase noise specifications supplied with unit.
DA1-100-10-FO Brochure. © Precision Test Systems Ltd 2016
Higher output levels, up to +20 dBm.
Different amplifier gains allowing different input levels from -20 dBm to +30 dBm to be accommodated.
Various numbers of outputs from 5 to 40. Taylor made to suit your application.
External DC Power Input. The DA1-100-10 can also have an external 12VDC input (12 - 15 VDC). This can be
used to provide back up power. If AC power is lost, the DA1-100-10 will immediately switch to the 12VDC supply.
Redundancy. Two units operate together. If one unit fails, the outputs are automatically switched to the secondary
unit. Also redundant AC supplies can be incorporated with dual AC connectors.
Internal backup oscillator. This oscillator is automatically enabled should the input signal fail. The oscillator can be
specified in any frequency from 1 to 100 MHz.
Two reference inputs. Each reference input with have five isolated outputs derived from it. So the DA1-100-10 can
operate at two different frequencies at the same time. E.g. 1 MHz and 5 MHz, 5 MHz and 10 MHz.
DA1-100-10 Rear view (with option 04 TNC Connectors). 1U case type. 2U case is double the height.
Precision Test Systems also manufacturers the PTS50 and DA1010 series of distribution amplifiers. These models are
lower cost alternatives to the DA1-100-10 but still give very good performance.
Specification Parameter
1 MHz to 100 MHz
Wideband Frequency Input
Bandwidth (2 MHz - 100 MHz)
± 1.5 dB (typically ± 1 dB)
(±3 dB from 1 to 150 MHz)
50 Ω
Input VSWR
< 1.50
Slave output terminated in 50 Ω
Input Level (coaxial)
+7 dBm to + 20 dBm
AGC Controlled. Optional -20 to +30 dBm
Sinewave Outputs
Output Waveform
50 Ω BNC Connector on rear panel
Output Frequency
Exactly the same as the input
Output VSWR
< 1.15: 1 @ 10 MHz
<1.8:1 @ 100 MHz
Output level (individually adjustable)
Adjustable 0 dBm to > +10 dBm 0 dBm to +13 dBm with > +10 dBm input
Output Level Stability
< 0.05 dB / °C
Typically < 0.02 dB / °C
Harmonic Distortion (10 dBm input)
-25 dBc
Typically -35 dBc @ 10 MHz
Spurious Outputs (> 500 kHz)
-125 dBc
Channel to Channel Isolation
> 90 dB @ 10 MHz.
> 60 dB @ 100 MHz
Input to Output Isolation
> 130 dB @10 MHz
> 105 dB @ 100 MHz
Delay match between outputs
< 2.5 ns (<500 ps / 5)
< 500 ps within group of 5 outputs
Temperature Stability of delay
10 ps/°C
Typically 5 ps/°C
Slave Output
Slave Output
Passive output derived from input Level = input level - 7 dB.
Allan Deviation
Allan Deviation
< 5 x 10 (1 sec)
Calculated from phase noise
Phase Noise (coaxial inputs and outputs)
DA1-100-10-FO Brochure. © Precision Test Systems Ltd 2016
Phase Noise (dBc/Hz). Standard unit
with five or ten outputs.
Phase Noise (dBc/Hz) typical with +13
dB Input and +13 dBm Output
Frequency Range - Link Gain
Gain Stability
Carrier to Noise Ratio (CNR)
Spurious-free dynamic range (SFDR)
Laser type - Optical Wavelength
Optical Power Output
Optical Connector
Power (AC)
Size and weight 1U case
Size and weight 2U case
Ambient Operating Temperature
-125 / -144 / -154 / -160 /
-161 / -162
-134 / -148 / -157 / -165 /
-167 / -167
Fiber Optic
1 to 100 MHz - 0 dB
± 3 dB over temperature range
110 dB
109 dB/Hz
DFB - 1310 ns ± 20 nm
4.5 dBm (nominal) 3mW
FC/APC socket
100 - 240 VAC (usable 90 - 260)
483 x 300 x 44 mm and 2.8 kg
483 x 300 x 88 mm and 3.4 kg
1 /10 / 100 /1k /10k/100k Hz offsets
1 /10 / 100 /1k /10k/100k Hz offsets.
Options to -171 dBc available.
50 Watts max
Width x Depth x Height
Width x Depth x Height
-10C to +40 C
Alarm Output
Alarm Outputs on rear panel
Options (not all options can be fitted at the same time)
Option 01
Dual changeover alarm relay
Activated in the event of an alarm
Option 02A, 02B
Ground Isolated Input or Outputs
Option 03, 03A, 03B, 03C, 03D, 03E
Redundancy Options inc. AC
Requires two units
Options 04 and 05, 05B
TNC, SMA or N type connectors
Options 06 and 07
Phase Noise / UKAS certificates
Option 08, 08A, 08B, 08C, 08D
Increased Outputs to +20 dBm
Option 09A, 09B, 09C, 09D or 09E
Additional sinewave outputs
From 5 to 40 outputs available
Option 10, 10B, 10C
Squarewave outputs
TTL/CMOS or ECL output levels
Option 10D
Programmable DDS Output
0-80 MHz in 1 µHz steps. RS232 setting
Option 11 to option 11F
Divided frequency output
E.g. 2.048 MHz, 1MHz, 5 MHz, 1 pps etc.
Option 12, 12A, 12B
Multiplied output
E.g. X2, X5, X10, X100.
Option 13, 13A
Low Pass filter on output
Improved harmonic rejection
Option 14, 14A
External DC input
Operates from 12.0 to 13 or 8 to 15 VDC
Option 16-XXX
Internal backup oscillator
XXX = frequency in MHz.
Option 17-XXX
Different Gain Levels
Customer to advise gain requirement
Option 19 / 20
Second External Input’s
Automatic switchover if 1st input is lost
Option 22
Extra Internal Amplifier
Option 23
Optimized Bandwidth
E.g. 100 to 120 MHz
Option 27
Ethernet Interface for Alarms
Head Office - UK
Precision Test Systems LTD
The Studio, Whitehouse Farm
New Hall Lane, Mundon
Maldon, Essex, CM9 6PJ, UK
Tel: +44 (0) 870 368 9608
Fax: +44 (0) 1245 330030
Email: uksales@ptsyst.com
Web: www.ptsyst.com
South Africa
Precision Test Systems cc
South Africa
Fax: 08651 58198
Email: sasales@ptsyst.com
Web: www.ptsyst.com
Precision Test Systems
304 S. Jones Blvd, Suite # 807
Las Vegas
Nevada, 89107, USA
Tel: 1 888 876 4804
Fax: 1 832 201 6564
Email: usasales@ptsyst.com
Web: www.ptsyst.com
Specifications subject to change without notice (141016))
DA1-100-10-FO Brochure. © Precision Test Systems Ltd 2016
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