## About the Output Queue and Input Buffer

### Output Queue

The output queue is the area in the unit where response messages are stored.

Stored response messages are cleared once they are read by the controller of the PC. The output queue is also cleared at the following times.

The output queue of the unit is 10KB. If a response message exceeds this size, a query error is generated and the output buffer is cleared.

For GP-IB, the output queue is cleared and a query error is generated if a new message is received when there is data in the output queue.

### Input Buffer

The input buffer is the area in the unit where received data is stored.

The input buffer is 10KB.

If data exceeding 10KB was sent and the input buffer becomes full, the GP-IB interface bus enters a wait state until free space becomes available.

RS-232C, USB and LAN cannot receive data that exceeds 10KB.

Keep the length of one command under 10KB.