bit 
4: 
Message Available 
The Message Available MAV  bit becomes set when any message is 
ready to be transmitted over the GPlB interface (not the 
-232 
inter- 
face).  Once the message 
is 
sent, the MAV  bit is cleared. A GPlB device 
clear command will clear the output queue and, as a result, this bit. 
NOTE 
After a query 
is 
issued over the GPlB interface this bit should be checked by 
means of  a serial poll before attempting to read the query response. 
bit 
3: 
New Valid Data Available 
The New Valid Data Available Channel B (NVDA) bit becomes set when 
a new reading has been taken on channel B that 
is 
not overrange, did 
not saturate the detector, did not cause a data error and was not taken 
while ranging.  It 
is 
cleared by the R?, R-A?,  RWS? or RWS-A?  queries. 
bit 
2: 
New Data Available 
The New Data Available Channel B (NDA) bit becomes set when a new 
reading has been taken on channel B.  It  is cleared by the R?, R-A?, 
RWS? or RWS-A?  queries. 
bit 
1 
: 
New Valid Data Available 
The New Valid Data Available Channel A (NVDA) bit becomes set when 
a new reading has been taken on channel A that 
is 
not overrange, did 
not saturate the detector, did not cause a data error and was not  taken 
while ranging.  It 
is 
cleared by the R?, R-A?,  RWS? or RWS-A?  queries. 
bit 
0: 
New Data Available 
The New Data Available Channel A (NDA) bit becomes set when a new 
reading has been taken on channel A.  It 
is 
cleared by the R?, 
R-A?, 
RWS? or RWS-A?  queries. 
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