User's Manual

Table Of Contents

EX7100 Technical Manual - Module Descriptions

Note1: Note that on many analysers, it is not possible to measure the full isolation, as

there is not sufficient dynamic range available. Therefore, it is suggested that the trace, at

the point where it becomes noise, be centred on the centre vertical graticule of the

instrument. Check the notch depth (Isolation Loss) at this point.

BRBP Filter adjustment (HPF)

1. Disconnect both coax leads from the BRBP section of the Duplexer.

2. Connect the analyser input to port (1).

3. Feed the tracking generator output into port (2). Set the analyser to the low frequency

of the terminal at the maximum output level available.

4. Adjust the three adjustment screws on the BRBP filter for the deepest notch on the

low operating frequency of the terminal (See Note1 above). Check that the notch

depth (Isolation Loss) is ≥ 80dB.

5. Check that the Insertion Loss is ≤ 1.0dB.

6. Reconnect all leads to the BRBP filter.

BPBR Filter adjustment (LPF)

1. Disconnect both coax leads from the BPBR section of the Duplexer.

2. Connect the analyser input to port (7).

3. Feed the tracking generator output into port (6). Set the analyser to the high

frequency of the terminal at the maximum output level available.

4. Adjust the three adjustment screws on the BPBR filter for the deepest notch on the

high operating frequency of the terminal (See Note1 above). Check that the notch

depth (Isolation Loss) is ≥ 80dB.

5. Check that the Insertion Loss is ≤ 1.0dB.

6. Reconnect all leads to the BPBR filter.

Duplex Filter adjustment

1. Disconnect the “High” and “Low” coax leads from the Duplex filter section of the

Duplexer. Connect a 50Ω load to the Antenna port (4).

2. Connect the analyser input to the high frequency port (3).

3. Feed the tracking generator output into the low frequency port (5). Set the analyser to

the high frequency of the terminal at the maximum output level available.

4. Adjust the two low pass adjustment screws on the Duplex filter for the deepest notch

on the high operating frequency of the terminal (See Note1 above). Check that the

notch depth (Isolation Loss) is ≥ 80dB.