Fairhaven RD500 User Manual - 4.23

4.23 

 Remote control handset 

The receiver’s front panel keys are repeated on the remote handset, and the alphabet is 

provided on individual keys for ease of  text entry. There are two additional keys 

labelled and , which allow selection of the alphabet or numerical 

keys. 

(See section 4.20 c for text searching or refer to the index at the front of the manual for 

all other functions).

4.24  

External keyboard

A standard pc computer keyboard can be connected to the keyboard socket on the rear 

panel to provide an easy means of entering information. Text can be edited by 

inserting and over typing,  but if a large amount of information is to be entered it may 

be easier to use the p.c. windows software which is provided with the RD500. The 

maximum current available to power the keyboard is 100mA and this should not be 

exceeded unless the receiver is powered from a larger power supply unit. A small, 

laptop size keyboard can be provided  which complies to the standard pc keyboard 

interface standard. However the receiver’s clock tolerance is narrower than the 

tolerance  of most p.c.’s, so if other manufacturers keyboards are used the keyboards 

internal clock may have to be trimmed to allow synchronisation of the keyboard to the 

receiver. To facilitate this a 30pF trimmer capacitor fitted to the keyboard’s resonator 

can be adjusted to ensure reliable text entry. 

PC Keyboard key layout. 

F1 

 F2 F3 F4 F5 F6 

Mode 

Band 

Mem 

Group  Text   Scan 

Arrow right - tune up 

Arrow left  -  tune down 

Enter  -  enter frequency etc. 

4.25  

Error codes and error messages 

If  the receiver displays an error code or error message, this may indicate that the 

memory has become corrupted. This may have been caused by a poor supply, low 

power supply voltage, or electrostatic disruption. To rectify the problem, switch the 

radio off and press the metal switch located in the underside of the case. (This is 

usually covered by a small round sticker). The receiver will now re-format itself, it 

may also automatically re-format its memory if corruption is detected this will cause 

the memory contents to be lost so it is important to back up the memories if a lot of 

work has been put into creating your own databases. Audio recording space will have 

to be allocated again, by pressing 1 6 1 if  required.