HP 4284A - Page 247

NR1
For example, 123
+123
0 12345
NR2
For example, 12.3
+1.234
0 123.4
NR3
For example, 1.23E+5
123.4E 0 56
When numeric data is used as a parameter, the sux multiplier
mnemonics and sux units (The sux multiplier must be used with
the sux unit.) can b e used for some commands as follows.
8-6 Command Reference