'Too many Parameter Sets'

The information provided is for help with Commtest Instruments products:

• vb instrument

PROBLEM

When sending to the vb instrument this error message appears:

'You are sending too many different Parameter Set entries to the vb. The vb only has space for 250'

SOLUTION

As the error message states, the instrument's parameter set table is now full. This happens eventually if a vb instrument is used extensively in Measure Mode, using a large variety of parameter settings (very large >250) .

Here are two ways to fix the problem, and one to prevent it from re-occurring

Option 1: Manually Delete the Parameter Sets

• From the vb Main Menu,
• Press [1] Measure Mode,
• Then press ^ Select Parameter Set. This screen lists all 250 parameter sets in the instrument.
• Any which do not have a tick/check in the Used column may be erased by pressing the [5] key.

Note: For US versions of the instrument, any routes will not be sent to the instrument; therefore, Option 1 is recommended.

Option 2: Erasing the Entire Parameter Set Table

• Transfer all data from the vb instrument to your computer.
• Now completely erase the instrument's memory. To do this:
• From the vb Main Menu press [5] Folder Management,
• Select option 3: Erase data in ALL Folders.
• Lastly, transfer the required folders from your PC back into the instrument.

Option 3: Orders Based Parameter Sets

This is not a solution to the immediate problem but will prevent it from re-occurring.

One reason for needing a large number of parameter sets is that machines all run at different speeds, so the same parameter set is repeated many times with different Fmax values.

From version 2.20, the vb instrument supports orders-based parameter sets. This means that Fmax is specified as, say, 10 times running speed, rather than as a fixed Hz/CPM value. By switching to these orders based measurements, far fewer parameter sets are required to cover the range of machine running speeds. So the instrument's capacity of 250 is very unlikely to be exceeded.

See the Instrument Reference Guide or the Ascent/MAS VB online help for more details.

FAQ ID: 11617 Last Reviewed: 27/08/2002