User manual

P ART O NE : ABOUT REMOTE CONTROL
34 ISSUED: February 2005 WM-RCM-E Rev D
Scope Rear Panel
The LAN connector is shown in the illustration above (item 8).
• Supports IEEE 802.3 Ethernet standards
• Supports 10Base-T and 100Base-T
Ethernet Connection
The instrument operates over a standard 10Base-T/100Base-T Ethernet connection. The instrument can be
plugged into a network or operated from a direct connection to a host computer. A different type of cable is
required for each of these connections. For a direct connection to the PC, a crossover cable is required,
whereas the network connection is made using a straight cable.
Headers for LAN Data Transfers
The format of the header sent before each data block, both to and from the instrument, is set out in the
following table:
Byte #
Purpose
0 Operation
1 Header Version
2 Sequence Number*
3 Spare (reserved for future expansion)
4 Block Length, (bytes of data), LSB
5 Block Length (bytes of data)
6 Block Length (bytes of data)
7 Block Length, (bytes of data), MSB
* The sequence number is used to synchronize write/read operations to simulate 488.2
“discard unread response” behavior. Valid range is 1 to 255 (zero is omitted
intentionally).