INSTALLATION GUIDE FOR RA-7800
RA-7800 QI
Copyright - refer to title page
Page 49
ENU Status : 1-0-1
Node Name
Description
[Switch]
Switch on/off is to enable/disable the PA output
[Pre-ATT]
The purpose of adjusting the Pre-ATT is to adjust the system gain and avoid BTS
input power exceeding the power range, thus ensuring good call quality
[Alarm Threshold]
Customers can set alarm threshold according to situation, such as VSWR
threshold, PA Over-temperature threshold and Power threshold
[Power]
Includes Downlink Output Over Low threshold, Uplink Output Power Low threshold
[Gain]
Gain is equal to specified max gain minus real ATT setting.
[Temperature]
Only available for RU. A measured temperature is shown.
Table 22: RF information
All the RF parameters included in each node of the [RF Info.] are separated into three groups for
presenting the RF information of each frequency band as GSM1800, WCDMA2100. And for RU
commissioning, all the RF parameters will be separated for specifying the RF information for RU. The
following table provides descriptions of the equipment RF parameters.
Identifier
Application
Setting 1
Setting 2
Initial setting
Switch
Control RF output
power for
commissioning and
diagnosis. There are
two independent
switches for
GSM1800,
WCDMA2100.
‘ON' = DC power
supply enabled, and
the frequency
selection and
amplifier module is
enabled, parameters
can be set and read.
‘OFF’= no DC supply
to frequency selection
and amplifier module.
Their parameters
(frequency band,
ATT, power, and
alarm) can not be
read or set.
‘ON’ for
GSM1800,
WCDMA2100
RF Switch of
MU/RU
Pre-ATT
Adjusting the Pre-
ATT to avoid BTS
input power
exceeding the power
range so as to
ensure damage
equipment.
Setting range for MU
UL/DL Pre-ATT is
0~25dB
Setting range for RU
UL/DL Pre-ATT is
0~30dB
20dB for
GSM1800,
WCDMA2100
of MU/RU
DL Input
Power
Overload
threshold
If the measured
power value is
higher than the Input
Power Overload
setting, the
appropriate
uplink/downlink
power alarm will be
generated.
Setting range of DL
input power low for
MU is
-15~5dBm
n/a 6dBm
for
GSM1800,
WCDMA2100
band of MU
DL output
Power Low
threshold
If the measured
power value is lower
than the Output
Power Low setting,
the appropriate
uplink/downlink
power alarm will be
generated.
Setting range of DL
output power low for
GSM1800 of MU is
22~40dBm;
Setting range of DL
output power low for
WCDMA2100 of MU
is
19~37dBm
n/a
21dBm for
GSM1800
band of MU
18 dBm for
WCDMA2100
band of MU
Chassis
Over-
temperatur
e threshold
Setting the upper-
temperature
threshold of RU DL
PA. A measured
temperature is
shown.
If the measured
temperature exceeds
the threshold, an
alarm is generated.
Setting range for RU
is
-40~125
o
C
80
o
C for RU
Table 23: Management - RF parameters
