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CDM-600L Satellite Modem
Front Panel Operation
CONFIG:CLOCKS: RX BUFFER/CLOCK
CLK= RX-SAT (RX-SAT,TX-TERR,EXT-CLK,INS)
BUFFER-SIZE = 00016bytes(00002ms) CENTER
sing the [←] [→] arrow keys keys, select one of the three parameters on the screen to
U
edit.
Edit the RX clock options using the [↑] [↓] arrow keys, then press ENTER
RX-SAT
TX-TERR
EXT-CLK
INS
Buffer-Size indicates the size, in bytes, of the Plesiochronous/Doppler Buffer. In
parantheses after this, the size in milliseconds is shown. Edit each digit of the buffer size
using the [↑] [↓] arrow keys. Press ENTER.
Note: When the Rx data rate is set to one of the four G.703 rates, the minimum buffer size
and step size are limited to the value shown in the table below. In addition, Insert Framing
follows the same rule, regardless of n x 64 data rate, depending upon whether the Insert
Type is T1 or E1. If none of these cases is true, the minimum buffer size is 16 bytes with a
step size of 2 bytes.
1544 kbps (T1) or open network D&I at T1
2048 kbps (E1) or open network D&I at E1
D&I++ at n = 1, 3 or 5
D&I++ at n = 2, 6 10 or 15
D&I++ at n = 9
D&I++ at n = 4, 12 or 20
D&I++ at n = 18
D&I++ at n = 7 or 21
D&I++ at n = 8 or 24
D&I++ at n = 11
D&I++ at n = 13
D&I++ at n = 14
D&I++ at n = 16
D&I++ at n = 17
D&I++ at n = 19
D&I++ at n = 22
D&I++ at n = 23
6312 kbps (T2)
8448 kbps (E2)
Sets the Receive buffer clock source to the satellite clock (The receive
buffer will be bypassed.) Note: This will fix the buffer size to minimum.
In this timing mode, data is clocked out of the receive buffer using the
the external transmit clock.
In this timing mode, data is clocked out of the receive buffer using an
external clock.
Sets the buffer clock to the Insert stream (INSERT mode only).
RX Data Rate
6–19
Buffer Step Size
1158 bytes or 3 milliseconds for D4
(6 milliseconds for ESF)
1024 bytes or 4 milliseconds
720 bytes
1440 bytes
2160 bytes
2880 bytes
4320 bytes
5040 bytes
5760 bytes
7920 bytes
9360 bytes
10080 bytes
11520 bytes
12240 bytes
13680 bytes
15840 bytes
16560 bytes
1578 bytes or 2 milliseconds
528 bytes or 0.5 milliseconds
Revision 2
MN/CDM600L.IOM
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