Product features
It meets the requirements of TB/T "technical conditions for unified monitoring and management system of GSM-R relay equipment"
It meets the requirements of TB/T "technical specification for GSM-R relay equipment" It meets the requirements of hot standby for the whole machine
It can detect the input power of the base station
It has automatic regulation of downlink gain to ensure the stability of output power. The SWR detection module is added to detect the downlink SWR coefficient.
The transmission loss of the optical path can be detected.
Rich data interface: including local debugging port, network management communication interface, extended interface, and extended data channel interface
1 U-NII
Downlink: 930MHz～934MHz;
Uplink: 885MHz～889MHz.
2 Maximum output power
The maximum output power of the downlink is 37dBm, and the tolerance at normal temperature is in the range of ±1dB.
3 gain
Maximum downlink gain: 40; tolerance range :±1dB;
4 adjustment range of gain
Range of gain adjustment: ≥20dB.
5 gain adjustment step and step error
The gain adjustment step is 1dB, and the gain adjustment step error is not more than ±1dB.
4 Range of automatic level control (ALC)
When the input signal level is increased by no more than 13dB, the output power should be kept within ±2dB of the nominal linear output power. When the input signal level is increased by more than 13dB, the output power should be kept within ±2dB of the nominal linear output power, or be the output should be closed.
7 maximum allowable input level
The maximum allowable input level (uplink) is equal to -10dBm, and the repeater has no damage. 8 Passband Ripple:Passband Ripple ≤1dB（p-p）; within the U-NII.
The noise coefficient NF≤4dB.
10 input and output voltage SWR
The voltage SWR≤1.4
11 transmission delay
Broadband optical fiber transmission repeater ≤1.0μs
12 stray emission
13 intermodulation products
A) Interband intermodulation:
≤-36dBm（or≤-60dB/3kHz）
B) out -off-band intermodulation:
≤-36dBm/100kHz（≥9kHz~≤1GHz）；
≤-30dBm/1MHz（＞1GHz~≤12.75GHz
14 out- of- band suppression
When the deviation edge frequency is no less than 5MHz, out- of- band suppression is no less than 30dB .
15 allowable value of optical path loss
allowable value of optical path loss≥7dB
9KHz～1GHz：≤-36dBm
1GHz～12.75GHz：≤-30dBm
GSM-R analog optical