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Trouble Shooting

Distorts

Input overload. Check that the attenuation switch on
the transmitter is set to -20dB

Overload  in  the  mixer  input.  Reduce  output  gain  on
receiver and/or reduce input gain on mixer.

If  headworn,  check  the  position  of  the  microphone
capsule.

No RF shown on receiver

Check that the transmitter is on.

Is the battery OK? Try another one.

Has  the  rubber  transit  cover  been  removed  from  the
battery?

Has the battery been inserted correctly?  Check polarity

Intermittant RF

Check that the battery is properly installed.

Inspect  the  transmitter  aerial  for  damage  and  loose
fitting.

Check  that  the  transmitter  aerial  is  straight  and  as
vertical as you can manage.

Body  absorbtion  of  RF.  Check  that  the  transmitter
aerial is not stuck to the skin with tape. Avoid contact
of aerial with skin if possible.

Works, but hisses

A  faulty  capsule.  They  can  fail  by  giving  low  gain.
Substitute  a  good  microphone  from  another  pack,  or
use the spare if only 1 pack is in use.

A level mismatch, where a low signal is amplified by
the  next  stage  increasing  background  hiss  to  audible
levels. Below are the most likely solutions to this.

Reduce input gain on mixer, increase receiver output.

Set attenuation setting to high on tranmitter. If disto-
tion results, return to original setting.

Sweat in the pocket pack
transmitter

Some actors (and some locations!) produce a lot of
sweating. Ingress of sweat can affect performance.

Consider re-positioning the pack on the actor.

Take a child’s balloon and trim with scissors so that
you can encase the transmitter in a waterproof cover-
ing.

Summary of Contents for 1000 series

Page 1: ...The Gradav Guide to Sennheiser 1000 series Radio Mics ...

Page 2: ......

Page 3: ...result has been achieved At the same time LEDs have been used to improve the monitoring of RF Radio Frequency and AF Audio Frequency to provide the operator with a clearer picture of system performance The final result has been an effective and popular system that is equally useful to the occasional user with 1 channel as it is to an experienced operator working multi channel on a complicated show...

Page 4: ...d If you do not get the channel working using the arrow end it is worthwhile setting the other end to the required channel 1 All transmitters are supplied with an aerial 2 fitted This aerial will have been used for testing Should there be a need to replace the aerial it is a simple task to unscrew using a flat bladed screw driver of the correct size When fitting a new aerial take care not to over ...

Page 5: ...he terminals match those of the transmitter Both are marked clearly It may be necessary to change the transmitter operating frequency using the channel change switch A The screwdriver operated rotary switch has an arrow pointed end to show which channel is in use Sometimes it is not easy to distin guish the arrow from the plain end If you do not get the channel working using the arrow end it is wo...

Page 6: ...aerial is in use AF Level Indicates the audio output Channel selector switch VHF systems have 6 frequencies UHF systems have a 16 channel switch but only 12 frequencies are available Channels 13 16 are repeats of other frequencies Channel information panel Shows channel available and their frequencies A B C D E F G H L G J K BNC Aerial connector 6 25mm Jack socket output Unbalanced 3 pin XLR outpu...

Page 7: ...time experimenting with aerial location for a small change can often transform system performance Where we have supplied a flightcased system you should note that we number the transmitter it s receiver and output cable with corresponding channel numbers Power up using either plugtop power supplies single kits or connect to the mains and switch on the ADA Aerial Distribution Amplifier which in tur...

Page 8: ...must be vertical We offer black microphones as standard but pink models are available if requested at the time of ordering 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 Never stick aerials to skin Capacitive coupling of aerial to skin body leads to high RF absorbtion w...

Page 9: ...btion of RF Check that the transmitter aerial is not stuck to the skin with tape Avoid contact of aerial with skin if possible Works but hisses A faulty capsule They can fail by giving low gain Substitute a good microphone from another pack or use the spare if only 1 pack is in use A level mismatch where a low signal is amplified by the next stage increasing background hiss to audible levels Below...

Page 10: ...ng ring tight Check for looseness Snap fit connectors should be fully home If you think you have found a faulty microphone test your suspicions by substituting a working micro phone from another unit Then confirm by trying the suspect microphone on a pack that is known to work without crackling Scraping noises Check that the capsule does not come into contact with costume or jewellery Cable scrapi...

Page 11: ......

Page 12: ...Unit C6 Hastingwood Trading Estate 35 Harbet Road London N18 3HU Phone 020 8803 7400 email office gradav co uk FAX 020 8803 5060 Web www gradav co uk ...

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