There are nice Trimble Resolution-T TEP timing receivers available for cheap on
Ebay. The TEP version is designed to emulate an 8 channel Motorola receiver.
The firmware does support operation in TSIP mode. You can use Trimble Studio
to put the receiver into TSIP mode or you can send the (undocumented) Motorola
binary message "@@Wb" (followed by a 0x35 checksum byte, 0x0D, 0x0A).
Note that other brands of timing receivers (like the Jupiter-T) also support
Motorola emulation mode. They also use the "@@Wb" command for switching to
their native language, but the "@@Wb" might need to be followed by another byte
that specifies the protocol to speak. For the Jupiter-T a 0 means Motorola
mode, and a 1 means Zodiac mode (but if the Jupiter-T is in Zodiac mode, you
may need to send it the Zodiac factory reset command to get it back to Motorola
mode)
To switch a Trimble Resolution-T TEP from TSIP mode back to Motorola mode you
need to send the TSIP factory reset message (0x1E, 'F') There does not appear
to be a TSIP command for just switching the mode.
The next version of Lady Heather will have commands for doing the dirty work
for you...
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