Scientific Atlanta PowerVu D9234, Installation And Operation Manual

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&²
All transmitted command characters must be upper case ASCII. All characters are
echoed by the receiver, except for the Unit Number (i.e., byte #3) which is decre-
mented if greater than zero (0). This permits daisy-chaining two or more receivers
from one serial port.
(UURUUHVSRQVHV
The accompanying table shows BSR command error and overrun error response
frame information.
Table 13. Command/Overrun errors
Command error frame
Byte
Length Data Description
2 1 “?” Command error response
Overrun error frame
2 1 “&” Overrun error response
?
The command error message displays if the receiver cannot recognize the com-
mand, or if an internal microprocessor operating error or error condition exists.
&
The overrun error message displays if the receiver cannot process the command
completely, and/or if the command becomes corrupted during transmission.
%LW(UURU5DWH%(5
The BER command is available for polling the receiver to display the current Bit
Error Rate of the decoded digital signal (errors per second). Observe the following
syntax.
SA1BER
BER polls the receiver for the current Bit Error Rate (digital signal), where #.#E-# is
the number is bit errors in a 1 million bit sample, expressed in scientific notation.
The receiver responds by displaying the following.
BER=#.#E-#
&KDQQHO
The Channel command is available for polling the receiver to display the current
channel, or for changing the channel. Observe the following syntax.
SA1CH=###
CH polls the receiver for the current channel. CH=### changes the current channel.
The receiver responds by displaying the following.
CH=###
### can be any virtual channel number from 0 through 500.
(UURUV&RUUHFWHG
The CE command is available for polling the receiver to display the current Cor-
rected Error count, and for clearing or resetting the Corrected Error count. Observe
the following syntax.
SA1CE=0
CE polls the receiver for the current Corrected Error count. CE=0 clears or resets
the current Corrected Error count. The receiver responds by displaying the fol-
lowing.
CE=###
### (0 through 65536) is the number of Corrected (Viterbi) Errors counted since the
last reset. The Corrected Error count depends on the Signal Quality, and is auto-
matically reset each time the receiver is restarted. For information about signal
quality, see “Dish Pointing menu”.