Audiotel International Limited 2-400-0001 用户手册

22 

AUDIOTEL INTERNATIONAL MN400872 Issue 1 (08/04) 

D

ETECT

IV User Manual

AUDIOTEL INTERNATIONAL MN400872 Issue 1 (08/04) 

23

Changing the NLJD frequency
The operating frequency for an NLJD is specified by various approval bodies to minimise 
interference between different users of the RF spectrum. Depending on the country of operation 
one of these

 

CE  versions of the 

D

ETECT

IV  will operate on a frequency of 869.6MHz

 

FCC  versions of the 

D

ETECT

IV  will operate in the frequency band 902MHz 

to 928MHz (frequency hopping).

Where approvals allow it is possible to change the NLJD TX frequency to any channel in the range 
830MHz to 1000MHz in 100khz steps.



       Press the Mode CE button to reveal a Freq Tune button.



       Press the Freq Tune once 

The 

red 

selection box highlights the NLJD TX frequency displayed at the top of the screen in MHz.



       Move the underline highlight to the required digit using the LEFT and RIGHT keypad 

controls



       Use the UP and DOWN keypad controls to change the Tx frequency up and down.



       Press the Freq Tune button a second time to set the changed Tx frequency.

The 

red 

box highlight is returned to the previous current selection.