Welcome to
Azur Electronics
HP 8411A HARMONIC
FREQUENCY CONVERTER
Front view with cable outlet
Rear view showing special connectors
Note the special 9 Pin Socket connection to the 8410C, a very rare connector. Also the 8411A uses the APC-7 hermaphrodite connector to interface to the reference and test channel inputs. Apparently these inputs are very sensitive to static, so 'ground' cables before connecting them. 50mW +17dBm is the input power damage level, or more than ±3V will take out the Step Recovery Diodes (SRD) which are irreplaceable. This is the only item of equipment that I have that uses these connectors so APC-7 to N-type adaptors are essential.
March 2007
Bought the 8411A Option 018 (S/N 2004A) on eBay FR together with a 8410C & 8414A.
March 2009
Bought a 2nd unit Option 018 (S/N 2004A) on eBay UK.
August 2019
Tested original unit with 8410C. Second unit to be kept as a maintenance spare.
All the 8407A & 8410C based Network Analyser System has now been Sold.