Comtech EF Data SDM-300A - Manual (Page 119)

SDM-300A Satellite Modem Revision 6
Front Panel Operation MN/SDM300A.IOM
5–25
FUNCTION SELECT: CONFIGURATION: INTERFACE: BUFFER SIZE
(CONDITIONAL)
IMPORTANT
Conditional: The Bits or Milliseconds menu is displayed depending
upon whether Bits or Milliseconds is selected under the Utility:
Interface Buffer Program menu.
BUFFER SIZE
384 BITS
BUFFER SIZE
6 MILLI SECONDS
Sets the size of the buffer in either Bits or Milliseonds.
Upon entry, the current buffer length is displayed. Press [
↑] or [↓] to select the desired buffer
size. The buffer size is displayed in seconds or bits. Enter the Utility: Interface menu to change
the buffer units to seconds or bits.
If selecting seconds, choose from 1 to 99 ms, in increments of 1 ms ≤ 2.6 Mbps or 0
(Bypass).
If selecting bits, choose from 32 to 262144 bits, in increments of 16 bits.
Press [ENTER] to execute the change.
When D&I is selected for modem type, the buffer units are automatically set to ms. The user
may select as follows:
For Receive D&I overhead:
E1CAS format
nn = 7.5, 15, or 30 (milli-seconds)
T1IBS/T1S/T1ESFS format nn = 6, 12, 24, or 30 (milli-seconds)
all other D&I formats nn = 1, 2, 4, 8, 16, or 32 (milli-seconds)
Note: To have the modem calculate the plesiochronous shift, set the buffer units to ms. When a
specific buffer depth is desired, set the buffer units to bits. Select bits or ms from the Utility:
Interface menu.