User Manual

P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA

Maintenance Handbook

H/book Number:-60-056100HBKM

Issue No:-1

Date:-13/02/2003

Page:-67 of 67

5.2 Location 2, Unit 2 (60-056102)

5.2.1 Two Section Notch Filter (02-010401)

5.2.1.1 Description

Fitted in Unit 2 after the amplification stages is a 2 element notch filter (one in downlink,

one in uplink), which is designed to reject the uplink frequencies in the downlink path and

vice-versa. The notch filter is not required for Unit One as the rejection from the two

series bandpass filters as apposed to one, is sufficient to meet the specification.

5.2.1.2 Technical Specification

Response type: Chebyshev

Frequency range:

485-486MHz

Bandwidth:

1MHz (tuned to spec.)

No. of sections:

Insertion loss:

VSWR:

Better than 1.2:1

Connectors:

SMA

Power Handling:

100W maximum

operate:

-20°C to +55°C

Temperature range:

store:

-40°C to +70°C

Weight:

3 kg

Size:

384 x 82.5 x 56.4mm