\begin{table}%T1 
\caption{\label{Table1}Radio continuum observations of NGC~6946.}
\small%\centering
\par
\begin{tabular}{lcc}
\hline\hline
\  & VLA & Effelsberg \\
\hline
Frequency (GHz)       & 8.435 and 8.485  & 10.55 \\
Wavelength (cm)       & 3.55   and  3.52   & 2.84 \\
Configuration            & D              \\
Pointings                & 3 \\
Observing dates \hfill   & 1995 Apr. 13+20, 1996 July 21+23  & 1990 June to 1991 Feb. \\
Net observing time (h)   & 26              & 60 \\
Resolution of final maps & 8\farcs5 and 15\arcsec & 68\arcsec \\
Rms noise in $I$; $Q$ and $U$ ($\mu{\rm Jy/beam~area}$)  & 10; 7  and  15; 8  & 450; 200 \\
Reference                &                 & Ehle \& Beck (\cite{EB93}) \\
\hline
\par
Frequency (GHz)       & 4.835  and  4.885  & 4.85 \\
Wavelength (cm)       & 6.20   and  6.14   & 6.18 \\
Configuration            & D              \\
Pointings                & 1 \\
Observing dates \hfill   & 1991 Mar. 23 + Apr. 1 & 1997 Jan. to 1998 Sep. \\
Net observing time (h)   & 10              & 18 \\
Resolution of final maps & 15\arcsec       & 147\arcsec \\
Rms noise in $I$; $Q$ and $U$ ($\mu{\rm Jy/beam~area}$) & 22; 15 & 500; 70 \\
Reference                & Beck \& Hoernes (\cite{BH96}) \\
\hline
\par
Frequency (GHz)       &                 & 2.675 \\
Wavelength (cm)       &                 & 11.21 \\
Observing dates \hfill   &                 & 1999 Apr. to July \\
Net observing time (h)   &                 & 7 \\
Resolution of final maps &                 & 300\arcsec \\
Rms noise in $I$; $Q$ and $U$ ($\mu{\rm Jy/beam~area}$)  &       & 1000; 600 \\
\hline
\par
Frequency (GHz)       & 1.465  and  1.665  & 1.400 \\
Wavelength (cm)       & 20.46  and  18.01  & 21.41 \\
Configuration            & D + C          \\
Pointings                & 1 \\
Observing date  \hfill   & 1988 July 26 + 1996 Apr. 4  & 1998 Sep. \\
Net observing time (h)   & 12 +  11       & 7 \\
Resolution of final maps & 15\arcsec       & 560\arcsec \\
Rms noise in $I$; $Q$ and $U$ ($\mu{\rm Jy/beam~area}$) & 20; 12 & 5000; 2000 \\
Reference                & Beck (\cite{B91}, D array) \\
\hline
\label{tab1}
\end{tabular}
\end{table}