TW125B Low Current / Low Voltage 1.1 to 1.7 GHz
27 dB gain In-line Amplifier
The TW125B is a low cost, rugged,waterproof, low noise, low current/lowvoltage, 1.1 to 1.7 GHz band, 27dB gain inline amplifier, specially designed to amplify
all GNSS frequency signals, from GPS L5 to
GLONASS G1. The TW125B provides formuch longer cable runs from antenna toreceiver, for applications such as mastmount, large vehicle and timing systems,
without degradation of system sensitivity.
Its low loading allows for both the antenna
and the TW125B in-line amplifier to be
powered by the GNSS receiver.
TheTW125B passes DC supply to the antenna,
therefore not requiring additional hardware
such as bias-T, power cable and power
supply.

TW125B Dimensions (mm)IMPORTANT: Amplifiers are directional andmust be installed in the orientation indicatedon the product label. (Arrow points away fromantenna)

Applications• All GNSS Signals – GPS, GLONASS, Galileo, BeiDou & SBAS
• Commercial, Industrial and Military Telematics Systems• Wireless and Telecom Timing and Synchronization Applications

FeaturesBenefits•••••••••••

Low Current / low voltage
Very low noise
Wide input voltage 3 to 16 Volts
Nickel-plated brass, IP67 compliant housing
Powered via antenna coax from receiver
50 Ohm port impedance
Available SMA, TNC, and N-Type jack connectors
RoHS and REACH compliant•••

Improves signal reception
Enables extended cable runs
Avoid installation of costly low-loss
cableFits in line with antenna cable
No external DC power supply required
Easy to install - mounting clamp
includedTW125B Low Current / Low Voltage 1.1 to 1.7 GHz
27dB gain In-line Amplifier
Specifications
Vcc =3.3V, over full bandwidth, T=25 °C

Electrical•••••••••••••

Nominal Gain
Pass Band Ripple
Impedance
Noise FigureBandwidth
Input VSWR
Output VSWR
Reverse Isolation
Output P1dB
Group Delay (w/o cable)
Output IP3
Supply Range voltage
Supply Current

27 dB +.1/-.2 dB typ.
+/-0.5 dB
50 Ohms
2 dB typ.
1.1 to 1.7 GHz
1.3:1 typ..
1.3:1 typ.
>35 dB+9dB min<1ns+14dBm
3 to 16 VDC Nominal, 12 VDC recommended operating max
11 mA typ.

Mechanicals & Environmental••

Mechanical Size (body dimensions only)
Connectors
Torque Limitations (in. lbs)••••

Operating Temp. Range
EnclosureEnvironmental
Warranty

2.32” L x 0.787” Dia. (59 mm L x 20 mm dia.)
SMA Jack, TNC Jack, or N-Type Jack
N-typeTNC
SMA
6.5 – 89 - 11
3.6 – 4.5-40 to +85 °C
Nickel-plated brass
RoHS, REACH, and IP67 compliant
One year – parts and labour

Ordering Information•••••

TW125B - 27dB gain In-Line Amp with SMA female on both ends
32-0125B-00
TW125B - 27dB gain In-Line Amp with TNC female on both ends
32-0125B-01
TW125B - 27dB gain In-Line Amp with SMA female on antenna side and TNC on output side
32-0125B-02
2TW125B - 27dB gain In-Line Amp with TNC female on antenna side / SMA female on output sideRev32-0125B-03
TW125B - 27dB gain In-Line Amp with N-Type female on both ends
32-0125B-14 (premium applies)

Tallysman Wireless Inc
36 Steacie Drive
Ottawa ON K2K 2A9 Canada
Tel +1 613 591 3131 Fax 613 591 3121

sales@tallysman.comThe information provided herein is intended as a guide only and is subject to change without notice. This document is not to be regarded as a guarantee ofperformance. Tallysman Wireless Inc. hereby disclaims any or all warranties and liabilities of any kind. © 2015 Tallysman Wireless Inc. All rights reserved.
Rev 1.9