User's Manual

Table Of Contents

EX7100 Technical Manual – Monitoring and Diagnostics

Therefore, we would be unable to change the remote terminal’s frequencies unless we

visited the remote site. Similarly, if it were possible to change the remote terminals

frequencies, and an error was made in doing so, it would not be possible to remotely

access the terminal to amend the error.

For this reason, the EX7100 has a ‘smart’ Change Frequency command. If it is necessary

to change the frequencies of a working link, this procedure must be used.

This command allows the user to enter the new frequencies of all the terminals in the RF

path, and then issue the command to change them all simultaneously. If the link is unable

to be established on the new frequencies, the system automatically returns the link to the

original frequencies.

Important Note:

The EX7100’s front panel tuning range is limited. If a frequency change of more

than 100kHz is required, it will be necessary to manually retune some parts of the

RF Section of the radio.

Transmitter module re-tuning instructions are detailed in Sections 7.3.3 (VHF) and

7.4.3 (UHF). Receiver module re-tuning instructions are detailed in Sections 7.7.3

(VHF) and 7.8.3 (UHF). Duplexer module re-tuning instructions are given in Sections

7.9.3 (VHF) and 7.10.3 (UHF).

In addition, it may be necessary to replace the Duplexer module if a large change in

frequency is required. Refer Sections 7.9.4 (VHF) and 7.10.5 (UHF).

Procedure:

A) Use the procedure detailed in Section 4.3.1 ‘Setting Up a Test Link’, to gain access to

the remote terminal’s menu system.

B) Use the procedure detailed in Section 3.4.1 ‘Changing the Local Transmitter

Frequency’ (steps 2-9), to change the remote terminal’s Tx frequency.

Note: Although the new frequency will be displayed, it will not actually change until the

Change Frequency command is given.

C) Use the procedure detailed in Section 3.4.1 ‘Changing the Receiver Frequency’, to

change the remote terminal’s Rx frequency.

Note: Although the new frequency will be displayed, it will not actually change until the

Change frequency command is given.

D) If the link contains a repeater

, press the ‘Escape’ key until the list of terminal ESNs is

displayed. Select the most remote repeater terminal and repeat steps B and C. Press

the ‘Escape’ key until the list of terminal ESNs is displayed. Select the other repeater

terminal and repeat steps B and C.

If the link does not contain a repeater, ignore this step.

E) Press the Escape key to back through the menu.

F) Use the up arrow key to make sure the →

→→

→ is next to RF Parameters, and press

‘Enter’.