Excessive PV querying?

Output of caSnooper on NDXDEMO - seems LET and LARMOR are querying GOODUAH 30 times a second
```
C:\Instrument\Apps\EPICS>caSnooper -t10 -p10
Starting CaSnooper 2.1.2.3 (7-3-2013) at Nov 30 14:03:36
EPICS 7.0.3.1
Individual Name is CaSnoop.test
Internal PV names are not being published

CaSnooper terminating after 10.00 seconds [0.17 minutes]
Data collected for 10.00 seconds [0.17 minutes]

Nov 30 14:03:46:
There were 33221 requests to check for PV existence for 8946 different PVs.
Max(Hz): 29.09
Mean(Hz): 0.37
StDev(Hz): 0.58

PVs with top 10 requests:
1 NDXLARMOR.isis.cclrc.ac.uk:54098 IN:LARMOR:DAE:GOODUAH 29.09
2 NDXLET.isis.cclrc.ac.uk:51482 IN:LET:DAE:GOODUAH 28.89
```