Can you use a PSM1000 transmitter with a P9RA beltpack receiver? What about a PSM900 transmitter with a P10R receiver?
It is possible to "mix and match" the PSM900 and PSM1000 personal monitor system components. A P9RA beltpack receiver can be used with a P9T transmitter or a P10T transmitter. Similarly, a P10R beltpack receiver can be used with either a P10T or a P9T transmitter.
When planning to use a mixture of personal monitor components, be sure to match up the frequency ranges. The PSM900 U.S. frequency ranges are:
G6 -- TV channels 14-19, 470-506 MHz
G7 -- TV channels 20-25, 506-542 MHz
K1 -- TV channels 35-40, 596-632 MHz
L6 -- TV channels 45-50, 656-692 MHz
The PSM1000 U.S. frequency ranges are:
G10 -- TV channels 14-25, 470-542 MHz
J8 -- TV channels 28-39, 554-626 MHz
L8 -- TV channels 40-51, 626-698 MHz
So here are the compatible combinations of U.S. frequency bands:
PSM900-K1 PSM1000-J8 plus 6 MHz overlap to PSM1000-L8