Alpha 8100 Operating Manual page 52


01000 Gain slope
0025 Green LED threshold, tenths of a mA
0200 Red LED threshold, tenths of a mA
010 EBS switching threshold, tenths of a watt
128 EBS DAC setting
074 Bias DAC setting
* End of the "payload" portion of the sentence. The checksum calculation ends with the last
character preceding the "*" .
5621 Fletcher checksum (FCS) of the payload portion. The FCS is a two-byte quantity calculated
over the payload portion of the sentence, according to the following pseudocode:
sum1=0
sum2=0
for n=0 to (length(payload))-1
sum 1= sum1 +Payload(n)
sum2=sum2+sum1
next n
The result is displayed as hexadecimal ascii.
Telemetry Sentence
Send "v" to cause the unit to emit a sentence of this format:
$APA01,01536,00002,0595,2654,0867,260,0519,008,3,4,00,0*8DA3
$ Start or "flag" character. This can be used by an external program to locate the start of the
sentence, as it is never used elsewhere. The checksum calculation begins after this character.
APA01 Short for Alpha Power Amplifier type 01. . This indicates the sentence is from an Alpha
product, an amplifier. Type 01 sentences are frequently used for telemetry.
ALPHA 8100 OPERATING MANUAL
www.alpharadioproducts.com