Руководство Пользователя для Cisco Cisco Explorer Set-top Software Version 2.1
RF Status Diagnostic Screen
749244 Rev G
39
Current RDC
Field
Name
Description
Possible Values
Freq
The frequency, in MHz, to which the
QPSK transmitter is tuned
QPSK transmitter is tuned
[Dependent upon setting]
Range: 8–26.5 MHz
Range: 8–26.5 MHz
Power
The output level of the QPSK
transmitter
transmitter
Refer to specific hardware
specifications
• value displayed in white—
specifications
• value displayed in white—
signal level is nominal
• value displayed in amber—
signal level is marginally too
high or too low
high or too low
•
value displayed in red—
signal level is unacceptably too
high or too low
signal level is unacceptably too
high or too low
Delay
The round-trip delay, in
microseconds, between the DHCT
and the modem at the headend or
hub that is used to determine when
to transmit the slotted-aloha packets
Note: Slotted-aloha packets are
used to assign periods of time or
slots when the DHCT can transmit
without interfering with other DHCTs
on the same hub
microseconds, between the DHCT
and the modem at the headend or
hub that is used to determine when
to transmit the slotted-aloha packets
Note: Slotted-aloha packets are
used to assign periods of time or
slots when the DHCT can transmit
without interfering with other DHCTs
on the same hub
[Integer > 0]
Retrans
The number of retransmissions
(likely due to noise or collisions) of
the same data since the DHCT was
last booted
(likely due to noise or collisions) of
the same data since the DHCT was
last booted
0—desired value
non-0—indicates a potential issue
with a reserve plant
with a reserve plant