SOLiD RocketWAVE™ SRF-L-1835 Product Manual
V1.6 - DEC 2021
© 2021 SOLiD, Inc. All Rights Reserved. Confidential & Proprietary.
Page 8
Min.
Max.
Min.
Max.
Power
Min.
Max.
Min.
Max.
Power
1800 MHz
-52 dBm -22 dBm
34dB
64dB
+12 dBm -46 dBm -16 dBm
34dB
64dB
+18 dBm
3500 MHz
-54 dBm -24 dBm
42dB
72dB
+18 dBm -54 dBm -24 dBm
42dB
72dB
+18 dBm
The following block diagram describes the operation principle, how the repeater works (e.g. 1.8GHz frequency
range (b3)).
Isolation Check and Gain Limitation
The repeater often checks DL isolation between a donor antenna and a service antenna while servicing at work-
ing frequency. Basically the gain value for DL/UL must be maintained under [DL Isolation
– 15dB (
±
3dB)]. To
calculate the isolation value, the correlation value of input signal and that of the feedback signal are used.
If isolation value is measured [Gain + 7 dB] at 1.8 GHz or [Gain + 12 dB] at 3.5 GHz more than 30 seconds, the
repeater reports oscillation alarm and shuts down 5 seconds later. And the repeater maintains its shutting down
state until the power turned off and on or performs CPU reset.
Even though the oscillation state is maintained for more than 30 seconds, the oscillation may occur bigger be-
cause the isolation is getting worse. In this case, the repeater performs Over-output Shutdown.
Automatic Gain Control (AGC)
This function is that controlling gain value to maintain DL output power is [user setting value
±
2 dBm] when
B3
DPX
B3 DPX
LNA
LNA
PA
AGC
ALC
AGC
ISO
PA
RF
SAW
AMP
PAD
MIXER
MIXER
AMP
AMP
IF
SAW
RF
SAW
PAD
DL MUX
UL MUX
RF
SAW
B3 UL Path
B3 DL Path
PAD
AMP
MIXER
AMP
IF
SAW
AMP
AMP
MIXER
RF
SAW
B3 PLL
PAD
AMP
B3_PLL #1
B3_PLL #2
B3_PLL #3
B3_PLL #4
DET
DET
B3_PLL #1
B3_PLL #3
B3_PLL #3
B3_PLL #4
T-PAD
T-PAD
DET
AMP
T-PAD
T-PAD
