User Manual

Axell Wireless Limited
Technical Literature
L.A. M.T.A. Remote Sites
Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 131 of 148
4.13.5.3. 30dB Directional Coupler (07-002907)
The purpose of these couplers is to tap off known portions (in this case 30dB) of RF signal from
transmission lines nband to combine them, for example through splitter units for different purposes
(alarms/monitoring etc.), whilst maintaining an accurate 50: load to all ports/interfaces throughout the
specified frequency range. They are known as directional couplers as they couple power from the RF
mainline in one direction only.
07-002907 Specification
PARAMETER SPECIFICATION
Frequency range 800 - 1000MHz
Insertion loss <0.3dB
Coupling level -30dB ±0.5dB
Rejection N/A
Weight <200g
Connectors SMA, female
operation -20°C to +60°C Temperature
range
storage -40°C to +70°C
4.13.5.4. Switched Attenuator 0.25Watt, 0 - 30dB (10-000701)
10-000701 provides attenuation from 0 to 30dB in 2 dB steps The attenuation is simply set using the
four miniature toggle switches on the top of each unit. Each switch is clearly marked with the
attenuation it provides, and the total attenuation in line is the sum of the values switched in. They are
designed to maintain an accurate 50ȍ impedance over their operating frequency at both input and
output.
10-000701 Specification
PARAMETER SPECIFICATION
Attenuation Values 0-30dB
Attenuation Steps 2, 4, 8 and 16dB
Power Handling 0.25 Watt
Attenuation Accuracy ± 1.0 dB
Frequency Range DC to 1GHz
Impedance 50ȍ
Connectors SMA
VSWR 1.3:1
Weight 0.2kg
operation -20°C to +60°C Temperature
range
storage -40°C to +70°C