PortID

Identifier for the RF connector, written in upper or lower case letters and followed by a colon. The following port IDs are valid:

RF1IN, RF2IN, RF4IN           for the 3 RF input connectors (input level correction)

RF1OUT, RF2OUT, RF3OUT   for the 3 RF output connectors (output level correction)

Frequency points

Frequency of the measured or generated signal in MHz, to be arranged in ascending order, starting in column 2 (lowest frequency). The frequency points must be integer numbers (i.e. integer multiples of 1 MHz) and can be distributed across the entire RF input and output frequency range of the instrument (see data sheet).

Level points

Level of the measured or generated signal in dBm, to be arranged in descending order, starting in row 2 (highest level). The level points must be positive or negative integer numbers, followed by a colon, and can be distributed across the entire RF input and output power range of the connectors (see data sheet). Negative levels must be preceded by a minus sign “-“; using a plus sign “+” for positive numbers is not allowed.  

Correction values

n times m level correction values for the measured or generated signal in dB (if n is the number of frequency points, which is equal to the number of correction values per table row, and m is the number of level points). The total number of correction values n times m must not exceed 120 (it is possible though to choose m=120 and n=1 and vice versa).

The level correction values must be in the range between -1.20 dB and +1.20 dB. This is sufficient to compensate for a frequency response or level response caused by the test setup. Larger, correction factors can be defined by combining the user correction with a constant external input or output attenuation (see section RF Connectors in Chapter 4). Two consecutive correction values may be separated by any number of spaces or tabs.

Positive (negative) correction values for an output signal compensate for an external attenuation (gain) and increase (decrease) the generator level. Positive (negative) correction values for an input signal are added to (subtracted from) the measured RF signal levels.