-------- Original Message --------
From: Flindell Richard
To: rogerlovejoy
Date: Thu, 17 Mar 2011 15:47:04 +0000
Subject: FW: Network Rail information - Calstock/Tamar Valley

Dear Mr Lovejoy

Antenna details for 6516(1) Calstock Station are as follows:
1. Two identical antenna type Kathrein 800 10203
2. Beamwidths: Horizontal 65 degrees; Vertical 9,3 degrees
3. Orientations: 90 degrees (Harewood); 220 degrees (Bere Alston)

Subject: Network Rail information - Calstock/Tamar Valley
From: Flindell Richard
Date: Thu, 3 Mar 2011 18:33:14 +0000
To: rogerlovejoy

Dear Mr Lovejoy Ref:2815892

Further to our conversation yesterday evening I am writing with the information you requested.

As discussed, the Railway Communications System (RCS) is a vital upgrade of the analogue cab to signaller radios to a single digital, GSM-R based system across the entire rail network in Britain. Network Rail is mandated to install the infrastructure and RCS will be operational in the south of Britain by the end of 2012.

The frequency band that has been allocated to GSM-R is:

876 – 925 MHz:
876 MHz — 880 MHz: used for BTS receive (uplink)
921 MHz — 925 MHz: used for BTS transmit (downlink)

The frequencies that will be used on these base station sites will be between 921 MHz — 925 MHz.

The GSM-R network uses directional antennas, the types of directional antenna that have been planned for use at these sites are:

For example,

Bere Ferrers - two antennas with the following characteristics:
horizontal beamwidth 65 degrees, vertical beamwidth 9.3 degrees

Bere Alston - two antennas with the following characteristics:
horizontal beamwidth 30 degrees, vertical beamwidth 7.5 degrees

The antenna output power of these GSM-R sites are between 55 and 59dBm (EIRP), the actual power output (EIRP) is dependant upon the gain/type of the antenna used and feeder system losses.

The power output of the power amplifier is 43dBm.

The sensitivity of the radio receiver used in the GSM-R base station is -110dBm.

The base of the mast at Calstock is 9m by 3m

I hope this helps

Yours sincerely

Richard Flindell, Communications Manager

Railway Communications System, Network Rail