Skysport 6A radio gear problem

[Montrealblue]

Advice wanted,
I have just bought some secondhand radio control gear, supposed to be unused. I have charged up both batteries and installed them in the gear but I can't get the servoes to operate. All I get is a small movement when they are first switched on. Doesn't seem to matter what I try to do with the sticks or switches on the transmitter nothing happens.
What am I doing wrong or maybe what haven't I done that I should havedone?

HELP!!!!!!

[madmat]

Have you checked that the crystal in the handset matches the crystal in the reciever? Cant really think of anything else.

[Montrealblue]

easily overlooked but yes they do match,
Thanks

[ferlin]

Are you sure that the batteries are good in the receiver pack as they may be old and dead

[sgrimshaw]

Another possibility is a damaged crystal, they are very delicate - do you have any "known" crystals to try?

[Stut-G]

Also sounds obvious, have you got the Tx Xtal and RX Xtal in the RX and TX, and not the wrong way round?

[Roop]

Not sure if the Skysport is just PPM or PPM/PCM switchable, but if so, make sure that it's set to the correct system for the RX. Secondly, in addition to the Xtal debate, checl they are the correct make/compatible. Not all Xtals work in all systems. In addition to the above, ensure the Rx Xtal is single or dual conversion type as per the Rx. They are not cross-compatible AFAIK.