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6287 ALLY PLUS User’s ManualPage 3-18
Host Parameters (Group #50)
The options in Group #50 are used to control host interfacing. Refer to the
host system documentation for information on configuring these options.
50 — Physical buffer size
This parameter must match the buffer size that the host expects on the
channel to which the ALLY PLUS is attached. The default value of 01 is
for a 4K buffer, and it is most efficient for many systems. A value of 00
indicates a 2K buffer. For EAB support, select a value of 02 or 03 (refer to
Section 6 Coax Host Considerations for additional information). To
program this option, send one of these sequences:
!ALLY!50=00; 2K buffer size
!ALLY!50=01; 4K buffer size (default)
!ALLY!50=02; 2K buffer with EAB support
!ALLY!50=03; 4K buffer with EAB support
51 — Logical buffer size
The logical buffer size must match the contents of the log mode entry table
(found on the host system). The default value is 03 (for 3440 bytes). If a
change is required, the following sequences may be used:
!ALLY!51=00; 1960 bytes
!ALLY!51=01; 1920 bytes
!ALLY!51=02; 2560 bytes
!ALLY!51=03; 3440 bytes (default)
!ALLY!51=04; 3564 bytes