Sennheiser 3000 series Instruction Manual page 12

CHECK - every performance
Each channel in turn for RF signal strength and audio quality.
Inspect for damage to every microphone cable and connector.
Transmitter aerial for cable damage and ensure that the connector is tight.
Sensitivity (gain) switches get moved. Re-set if required.
Only when you are satisfied, should you distribute the transmitters. If you are not
planning to use them immediately it may be best to switch off the transmitters. When
all are switched off you should check the receiver displays. It will soon be obvious if
you have missed one!
Always collect the transmitters at the end of the show. Change batteries if
required, and conduct your checks straight away. It is better to discover a
problem at the end of a show, rather than 10 minutes before you need it next
time!
Handheld transmitters present fewer operational problems than do Pocket Packs.
They are more likely to get dropped (or lost!). Stress to all users that they must take
care until the transmitters are returned to you.
Pocket Pack transmitters can be disguised quite easily with most costumes, but do
remember that aerials must be vertical. We offer black microphones as standard, but
pink models are available if requested at the time of ordering.
Capacitive coupling of aerial to skin (body) leads to high RF absorbtion, with a
reduced effective output to the receiver. Avoid placing packs/aerials next to the
skin. Sweat will always affect RF output.
Extra microphones are available should you wish to
We supply some spares with hires. Spare aerials and microphones are sealed and
clearly marked. They should only be used in the case of failure.
Never stick aerials to skin
Headband microphones are available (MKE48) at an extra
cost.
NB2 adaptors are used with standard microphones (MKE2)
as shown in the illustration. There is a charge for these
adaptors.
between different users.