22.
22.2.0 Use good, double shielded cables.
22.2.1 Use, if nessasery, ferriteclamps over all the cables to prevent HF-currents on the ouside.
22.2.2 Keep generator and detector separated as far away as possible, with the filter in between them.
22.3 Notchdeepness is easy measured with a signal generator which is well shielded and filtered, has a calibrated attennuator and a max. ouput of at least 100mV.
22.4 If you are lucky to have a well shielded and filtered bandscope or spectrum analyser, you have an ideal sensitive, wide-range signal detector. Combined with a good, shielded signal generator with attennuator, you do not need extra attenuators.
22.5 If you should want to use an amateur- transmitter as a power-signal generator, use a small, well sheelded, BATTERY-powered portable of 350mW or less. Connect it DIRECTLY to the filter trough a (home made) shielded 20dB attennuator.
22.6 Avoid the use of a mains-powersupply for the transmitter, as signal will be radiated by the powerwires, and also will slip into the receiver through the mains-supply.
22.7.0 If you want to use an amateurreceiver as a sensitive detector, try to find a battery-operated one, which is very well sheelded.
22.7.1 Best use a battery as a power"supply".
22.7.2 Connect the battery directly to the receiver, or with as short as possible leads. This to avoid the pick-up of generator-signal trough the supply-wires or the mains.
22.7.3 In this case, you need further (home-build) step-atennuators with steps of 1, 2, 4, 8 and 16 dB; and some extra atennuators of 20 dB (see the ARRL-handbook how to build them). Total max. attennuation should be abt. 100 dB. They must be well sheelded.
22.7.4 Avoid long cables and unnessasery couplings.