8: Physical Layer Testing
To run Physical Layer Mandatory Test Requirements (PHY MTRs), you will use either a
BGAN Physical Layer Tester (BPLT) or BGAN Multi-Channel Platform (BMCP).
Notes:
The
bui_mode
parameter must be set to
true
when running the PHY MTRs. Refer to
for how to set this without having to do it in the
Configuration
page and then rebooting (and
only if the parameter is already set to
false
), otherwise please set it in the
Configuration
page, and then reboot the BRM for the change to take effect.
8.1: Running PHY MTRs on a Standalone BRM
The BRM as supplied in the TDK operates as a class 1 UT when not connected to a FEM. To run
PHY MTRs on a standalone BRM, take the following steps:
1. Close the BRM transmit power loop with a power splitter, per
2. Connect the splitter output to the BPLT or BMCP RX port, bypassing the BPLT or BMCP duplexer.
3. Connect the BRM RX to the BPLT or BMCP TX port, bypassing the BPLT or BMCP duplexer.
4. Are you using a BPLT or BMCP?
>
BPLT
- go to
Step 5
>
BMCP
- go to
Step 6
5. Set the attenuators to the following values, then proceed to
Step 6
:
Note:
Refer to the user guide provided by Square Peg Communications for how to set the
attenuators on the BPLT.
>
TX (forward path) 40dB
>
RX (return path) 50dB
6. Use the BRM level
BRM_UT.ini
and
BPLT.ini
files available on the Inmarsat Developer
Website to run Class 1 MTRs.
Note:
See comments in BPLT.ini on selecting the correct .ini parameters, according to whether a
BPLT or BMCP is used.
8.2: Running PHY MTRs on a BRM and FEM
The FEM as supplied with the TDK is set to operate as a class 2 UT. To run PHY MTRs on a BRM with
a FEM attached, take the following steps:
1. With a 30dB power attenuator in the path, connect the FEM antenna port to the BPLT or BMCP RF
connector.
2. Are you using a BPLT or BMCP?
25:
BGAN Radio Module Terminal Development Kit User Guide
Confidential and Proprietary – Inmarsat Global Limited
