Premier Mounts CDM-600 사용자 설명서

13–1 

The ESC++ mode of operation is a new, closed network frame structure which combines 
Automatic Uplink Power Control (AUPC) with a high speed asynchronous order-wire 
channel. The AUPC works identically to that offered with EDMAC and D&I++ framing, 
but is not compatible with either. This is because ESC++ framing uses a different 
overhead percentage than the other closed network framing modes. 
 
In order to use this  feature, Firmware Version 2.0.1 (or higher) must be installed. 

 
Baud rates from 1200 to 38400 bits/sec are offered using RS-232 format. As with the 
main remote port (P4B), three data formats are available: 8N1, 7E2 and 7O2. Pins 5 and 
6 of P3A are the input and output, respectively, for this data channel. Because 38.4 kbaud 
is the maximum rate available, the actual overhead percentage for ESC++ framing 
changes as the data rate increases, thereby saving bandwidth at high data rates. The added 
overhead is as follows: 
 
Data rate 

 

 

Overhead ratio (percentage) 

64 kbps to < 768 kbps   

19/17 (11.76%) 

768 kbps to 1.5 Mbps   

12/11 (9.09%) 

> 1.5 Mbps to 2.5 Mbps    

29/27 (7.4%) 

> 2.5 Mbps to 7 Mbps   

19/18 (5.56%) 

> 7 Mbps 

 

 

64/63 (1.58%) 

 

Note that 64 kbps is the minimum data rate allowable with ESC++. Depending upon code 
rate and modulation used, the modem’s maximum data rate of 20 Mbps may be used with 
ESC++. In all cases, if the Reed-Solomon outer codec is used, the 126/112 ratio is 
employed with ESC++. The new frame structure may be used with any FEC codec type 
available with the CDM-600.