Comtech-ef-data SDM-300A Manuale Utente Scaricare il pdf (Pagina 119)

100

101

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.

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Comtech-ef-data SDM-300A Manuale Utente Pagina 119

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