diff --git a/JET/loadJETdata.m b/JET/loadJETdata.m
index 870b175a1116a9d3b76975a4530ada7a4f43fcd5..1d0f0eacdf038126f32788092c52f10b93f28e8e 100644
--- a/JET/loadJETdata.m
+++ b/JET/loadJETdata.m
@@ -26,8 +26,10 @@ function [trace,error,varargout]=loadJETdata(shot,data_type,varargin)
 % Special case compatible with old gdat.m allows (JET related):
 %     gdat(51994,'ppf','efit/xip',...) % omitting the 'JET' input as assumes JET if 3rd argument is a string
 %
-% for simplicity also allows:
-%     gdat(51994,'ppf/efit/xip',1,'JET',....)
+% examples:
+%     aa=gdat(51994,'ppf/efit/xip',1,'JET');
+%     aa=gdat(55379,'jpf/di/c1f-chan8/131?type=lpf+diag=kc1f',1); % KC1F
+%     aa=gdat(53290,'jpf/di/c3-cats<c:001?type=lpf+diag=cats1',0,'JET')  % long magnetic 8s by 001, 002, 003, 004 blocks
 %
 % INPUT:
 % shot: shot number
diff --git a/JET/rda_eff.m b/JET/rda_eff.m
index 07990e2493add26997f2065fbad863dd238376eb..f0c13b85ad467514e204e640017631b7aaf7a678 100644
--- a/JET/rda_eff.m
+++ b/JET/rda_eff.m
@@ -128,6 +128,14 @@ if usemdsplus
       taaa=mdsvalue('_ttc91=dim_of(_tc91,0);_ttc91[0]');
       time=linspace(taaa+1e-6,taaa+4,length(data))';
     end
+    if isempty(time) & length(data)>1e6 & strcmpi(type,'lpf') & strcmpi(diag,'cats1')
+      ichannel=findstr(':00',maintrace);
+      iblock=str2num(maintrace(ichannel+3));
+      mdsdisconnect;
+      mdsconnect('mdsplus.jet.efda.org');
+      taaa=40+(iblock-1)*8;
+      time=linspace(taaa,taaa+8-4e-6,length(data))';
+    end
   case 2
     eval(['x=mdsvalue(''dim_of(_rdaeff' user ',0)'');']);
     eval(['time=mdsvalue(''dim_of(_rdaeff' user ',1)'');']);