Specifications
Time Running is the amount of the time the receiver has been running
The “*” items can be changed and they can be done by the front panel (see FRONT PANEL
section). They can also be changed through the Command Interface (see COMMAND
INTERFACE section below).
Receiver Statistics
RECEIVER STATISTICS
-------------------------------------
PID(s): 0x0400
Carrier Status: Acquired
AGC: 8845
Pre-FEC Avg BER: 1
Eb/No: 10.56
Bad Blocks: 7
Continuity Errs: 0
LBand Freq: 1106575000
Adjusted Freq: 1106562500
Symbol Rate: 7140000
Puncture Rate: 1/2
Over Current Ev: 0
I2C Errors: 0
Lost Lock Ev: 0
The settings marked with “*” can be changed, but should only be done when directed to do
so by an authorized AMB-OS support person. The other settings describe the health of the
receiver.
PID(s) is the Program Identification number of the carrier. This should be changed only when
directed by an AMB-OS support person.
Carrier Status is the state of the carrier. It should be “Aquired.”
AGC shows the relative strength of the RF carrier and the higher the number the better.
Pre-FEC Avg BER is the Average Bit Error Rate before the FEC (Forward Error Correction)
is applied.
Eb/No is the Energy per Bit above Noise and measures the quality of the data in the carrier. It
is possible to have a low AGC (low RF), but a high Eb/No if the data is good. Likewise, a
strong AGC (high RF) could have a low Eb/No if the carrier has interference to the data.
Bad Blocks measures how many blocks of data have been received that could not be
corrected with FEC (Forward Error Correction). With a high AGC and Eb/No, it should
be a very small number. A high number would indicate the RF has problems because of
interference, bad reception, poor peaking of the dish or faulty equipment like the LNB or
cabling.
Continuity Errs records the number of MPEG frames that were lost. This should correspond
to the bad blocks count. The transponder that AMB-OS and the CRC use is a DVB
compliant transponder and uses MPEG frames to transmit data.
LBand Freq is the frequency of the LNB output to the receiver. This should be changed only
when directed by an AMB-OS support person.
Adjusted Freq is how much the frequency has to change to keep the carrier locked. With a
new LNB, this should match the LBand frequency exactly.
Symbol Rate represents the data rate of the carrier and is roughly the same as the data rate of
the carrier. The AMB-OS carrier shares space with the CRC carrier and the combined
data rate is here. This should only be changed when directed by an AMB-OS support
person.
Puncture Rate describes the amount of Forward Error Correction. Redundant data is sent on
the carrier to fill lost bits to preserve the integrity of the data. This should be changed
only when directed by an AMB-OS support person.
Rev. 36 – Firmware version 1.61 45
©
2008