I've been trying to program my 271A, but have a big problem. I can select a tone frequency for a certain channel, and by exactly following the instructions in the manual, cause the desired tone frequency to be shown and saved as entered. That part works ok. However, if I change channels, and then come back to my original channel, the tone frequency has reverted to default (88.5).
This same problem occurs for any channel I wish to program; select a tone, enter a tone, save a tone, change channels, come back to original, 88.5 again. What am I doing wrong?