Page 1
S31 Series Solid State Microwave Power Amplifiers
0.8 – 3.0 GHz • 5 Watts to 500 Watts
Specifications subject to change without notice Page 1 ds-s31-series rev-a-1/17/2011
Instruments for Industry, S31 Series Solid State amplifiers are state-of-the-art amplifiers and provide outstanding RF
performance. The S31 Series amplifiers operate over the frequency range from 0.8-3.0 GHz and can be supplied at
power levels from 5 watts to 500 watts offering all the control and communication features needed for today’s
automated test systems. From the ground up, the S31 Series amplifiers are built to withstand rugged handling, whether
it's being shipped to you or hauled around from site to site. They feature heavy-duty aluminum chassis construction with
a modular approach for easy access and service.
Operation safety and ease of use are paramount in IFI product designs. The IFI S31 Series include a full complement of
RF and hardware protection circuits including high VSWR, over-current, voltage protection, redundant thermal and
airflow sensors for the module and the system level. In addition, the S31 series includes a state-of-the-art interface that is
sophisticated, comprehensive, and yet simple to use.
The backlit LCD screen shows forward/reverse power indication, system status and self-diagnostic information. All the
amplifiers operating parameters are simultaneously available in the amplifier front panel display as well as over the
remote bus. Selection switches allow you to switch the amplifier to the desired mode of operation for local control if the
unit is not being operated remotely.
For computer automation both an RS-232 and IEEE interface are provided as standard. To meet individual application
needs, the S31 Series amplifiers can be easily customized with other options. With this capability and its reliable elegant
design, the S31 series amplifiers are the perfect system for your applications.
Features
• Solid State Design
• Rugged Construction & High Reliability
• Instantaneous Broadband Frequency range
• Backlit screen
• Modular Design Construction
• Integrated Force Air Cooling
• Self-diagnostic circuitry
• IEEE-488 interface & RS232 Remote
Models & General Specifications:
Model
Number
Frequency
Range (GHz)
Rated Power
(watts minimum)
P1dB Power
(watts minimum)
Gain
(dB min)
Mains
(kVA)
Weight
(Pounds)
Size
(Inches)
S31-5
0.8-3.0 5 5
37
.10
30 Lbs
5.25” H x 19” W x 24” D
S31-10
0.8-3.0
10
8
40
.10
33 Lbs
5.25” H x 19” W x 24” D
S31-20
0.8-3.0
20
15
43
.20
35 Lbs
5.25” H x 19” W x 24” D
S31-25
0.8-3.0
25
20
44
.25
37 Lbs
5.25” H x 19” W x 24” D
S31-40
0.8-3.0
40
30
46
.30
45 Lbs
5.25” H x 19” W x 24” D
S31-50
0.8-3.0
50
40
47
.40
60 Lbs
7.00” H x 19” W x 24” D
S31-75
0.8-3.0
75
60
49
.60
75 Lbs
7.00” H x 19” W x 24” D
S31-100
0.8-3.0
100
80
50
0.8
80 Lbs
8.75” H x 19” W x 24” D
S31-150
0.8-3.0
150
130
52
1.2
100 Lbs
8.75” H x 19” W x 24” D
S31-200
0.8-3.0
200
150
53
1.5
120 Lbs
10.5” H x 19” W x 25” D
S31-250
0.8-3.0
250
200
54
2.0
200 Lbs
2x 10.5” H x 19” W x 25” D
S31-300
0.8-3.0
300
250
55
2.5
220 Lbs
2x 10.5” H x 19” W x 25” D
S31-400
0.8-3.0
400
350
56
3.0
450 Lbs
Rack Integrated
S31-500
0.8-3.0
500
450
57
4.0
500 Lbs
Rack Integrated
Page 2
S31 Series Solid State Microwave Power Amplifiers
0.8 – 3.0 GHz • 5 Watts to 500 Watts
Specifications subject to change without notice Page 2 ds-s31-series rev-a-1/17/2011
Standard Features for IFI S31 Series Solid State Amplifiers
VSWR Reflected Power Protection, the unit operates without damage or oscillation into any magnitude of phase or load impedance,
Open & Short Circuit Protection.
* Alternate Prime Power (specify at time of order)
GPIB IEEE 488 & RS232 Remote Control
RF Sample Port on the Front Panel, 112R for rear panel
Internal Pre-amplification to obtain rated output power with an input level of 0 dBm or less.
Gain Control Local & Remote, 30dB range
RF Input/Output Connectors on the Front Panel, 118R for rear panel
Internal Systems Diagnostics & Status Indicators
Total/Operate Elapsed Time Metering in hours
RF Safety Interlock
Standard
Features:
Forward/Reflected Power Indication simultaneously on Front Panel display
IFI S31 Series Solid State Amplifier Specifications
Frequency Range:
As Specified in Model Table
Rated Output Power:
As Specified in Model Table
Gain @ Rated Power:
As Specified in Model Table
Prime Power:
As Required (Some are listed below)
Input/output Impedance:
50 ohms
RF Input/ Sample Connectors:
S31
RF Output Connector:
Type N Female
Other connectors available by request or specification
Input VSWR:
2.0:1
Output VSWR:
2.5:1
Operating Temp:
0º to 50º C
Non-operating Temp:
-40º to 70º C (50,000 feet max)
Humidity:
95% without condensation
Altitude:
10,000 feet
Cooling System:
Air cooled, self contained
Modulation:
AM,FM, Pulse
Configuration:
Rack Mount as specified in Model Table, or Rack/Cabinet Integrated
Spurious Outputs:
<-60 dBc nominal
Harmonics:
-20dBc minimum @ Linear Power
Standard Prime Powers:
100, 115, 120 VAC ±10% 50/60 Hz, single phase
220, 230, 240VAC ±10% 50/60 Hz, single phase
120/208 or 200/220/230/240VAC ±10% 50/60 Hz, three phase Wye or Delta power is available
200/220/230/240VAC ±10% 50/60 Hz, three phase Wye or Delta power is available
Special Prime Powers other then listed are subject to availability
Some Available Options for IFI S31 Series Solid State Amplifiers
Option 110-1E:
GPIB IEEE-488 RS232 and Ethernet Remote Control
Option 110-2:
GPIB IEEE-488 and RS 422 Remote Control
Option 110-3
GPIB IEEE-488 and RS 485 Remote Control
Option 113:
Chassis slides for a 19" rack mounting
Option 118A:
RF Input On Front Output On Rear
Option 118B:
RF Input On Rear Output On Front
Page 3
S31 Series Solid State Microwave Power Amplifiers
0.8 – 3.0 GHz • 5 Watts to 500 Watts
Specifications subject to change without notice Page 3 ds-s31-series rev-a-1/17/2011
Outline Configurations:
5.25” High Chassis
7.0” High Chassis
8.75” High Chassis
10.5” High Chassis
2 Drawer Chassis
Page 4
S31 Series Solid State Microwave Power Amplifiers
0.8 – 3.0 GHz • 5 Watts to 500 Watts
Specifications subject to change without notice Page 4 ds-s31-series rev-a-1/17/2011
Rack Outline Configurations:
Rack Integrated
Rack Integrated
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