Motorola R-2550 Programming Reference Manual page 76

ER
Description:
Command Syntax: E R
Notes:
Motorola Communications Analyzer
Programming Reference
The ER
command selects Tone Remote as the synthesized modulation source.
The ES command sets the Tone Remote modulation source switch and specifies its
level.
The ER command is not available on the R-2550.
Remote Encode
Tone