SAGEMCOM UM20 User Manual

1-Free Sagemcom - Modification with the authorization of the management concerned – This docu-
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3000499643-R11-000-01
Page 21
UM User Manual (EN) rev. 3.2
The WAN radio is configured to be in Power Save Mode
4
most of the time and initiates a uplink com-
munication only few times a day to save the battery energy.
Internal WAN antenna
The meter is equipped with an integrated antenna. This antenna is enabled by default when leaving
factory.
For security reason, the minimal distance to respect between the meter and the human body is 31 cm
(1 feet).
External WAN antenna
In case of poor signal reception with the internal antenna due to the meter location for example, it is
possible to connect an external antenna and then switch the internal RF signal to the side RF con-
nector. This switching can be done through the Infrared or the BLE interface.
Only use a passive antenna with RF gain below 3 dBi. Never use an amplified antenna, nor a direc-
tional antenna.
Respect the installation instruction of the external antenna, and keep 31 cm (1 feet) away once con-
nected to the product.
In order to radiate properly, and for current consumption sake, the external antenna must be installed
31 cm (1 feet) away from any metallic items.
When the product is configure for external antenna usage, never leave the SMA connector not con-
nected and/or RF mismatched to the external antenna. This could leave to product damages.
The length of the external antenna must not be more than 3 meter (around 10 ft)
Error register
This register stores error which may impact metrological information.The bit assignment is defined in
the following table.
Table 2: Error Register
Bitfield
Fatal Error description
1
Bubbles error
2
Persistant hardware error
3
Internal clock problem
4
Metrological CRC problem
5
Metrological CRC problem
6
Configuration problem
7
Metrological RAM problem
8
Metrological Communication problem
[9 .. 31]
Reserved for future use
Flag register
4
Power Save mode feature is requested from modem to the network and it's up to the network to ac-
cept or change the parameters.

SAGEMCOM UM20 Specifications

General

Brand	SAGEMCOM
Model	UM20
Category	Measuring Instruments
Language	English