WARNING
Voltages in this equipment are hazardous to life. No us- er--serviceable parts inside. Refer all servicing to quali- fied service personnel.
In addition to the user--modifiable functions described above, the FP410 is designed so that many of its functions can be modified by a qualified technician. Instructions on imple- menting these modifications are provided in the FP410 Ser- vice Manual which is obtainable from Shure. These modifica- tions are:
1.Change Monitor In sensitivity.
2.Change Tape Out level.
3.Change Off--Attenuation value.
4.Change low--cut filter frequency.
5.Change Peak meter attack and decay time constants.
6.Change 0 VU Meter calibration to level other than +4 or +8 dBm.
7.Change Limiter threshold beyond the positions permitted by Switches 2 and 3 (see Figure 2).
8.Change to permanently lock one or more microphones on.
9.Change to permanently prevent one or more microphone channels from activating.
10.Change the preset Hold Time values.
11.Change the Monitor In jack to an Aux In jack function for cascading mixers or creating a “mix--minus”.
12.Change to provide reduced--level program feed in head- phones when Pull For Monitor switch is activated.
13.The FP410 can be changed to operate from 230 Vac, 50/60 Hz power. Similarly, the FP410E can be changed to operate from 100 to 120 Vac, 50/60 Hz mains voltage.
WARNING
The safety certifications of the FP410 and FP410E do not apply when the operating voltage is changed from the factory setting.
ADDITIONAL INFORMATION
Limiter
The front--panel Limiter switch turns on a fast--acting, peak-- responding limiter circuit that cuts overload distortion during loud program intervals without affecting normal program lev- els. When the switch is In (operating), the FP410 output is lim- ited to approximately +16 dBm. Increasing the individual or Master gain controls will increase the average output and the amount of limiting. The limiter threshold can be changed from its factory setting as described in the Modifiable Functions section. The front--panel red LED adjacent to the Limiter switch indicates limiter action.
Linked Mixers
The FP410 provides four microphone inputs. If additional mic inputs are needed, more FP410s (over 25, if necessary) can be “linked” using link cables of the type supplied. A setup like this can provide over 100 mic inputs. As long as the link jacks of all mixers are connected (out--to--in, sequentially, leaving one Link In and one Link Out jack unconnected), the automatic mixing functions will be shared by all units.
When FP410 mixers are linked, Shure Intellimix control functions are also linked so that a single multi--microphone system is created. All input signals (except the Monitor In sig- nal) appear at all linked mixer outputs. There is no master/ slave relationship.
The output--related controls and functions of each linked mixer are post--link and do not affect the signals appearing at other linked mixer outputs. Each mixer’s output controls may be set differently to obtain different results. These controls are: Master level control, 1 kHz Tone Oscillator, Peak/VU Meter switch, Limiter In and Limiter Threshold switches, Phone level and Monitor control, and Off--Attenuation switch. NOTE: The actual off--attenuation in the 13 dB switch position increases, as more mixers are linked. This reduces excessive noise and reverberation contributed by the increased number of typically “off” microphones.
The input--channel--related controls and functions of each linked mixer are pre--link and do not affect the input channels of other linked mixers. The effect of these input controls is re- flected in the mixed output signals of all the linked mixer out- puts. These controls are: Input channel levels controls and Low--Cut switches, Manual/Auto switch, Phantom On/Off switch, Phantom Voltage Selector switch, Hold Time switch, and Last Mic Lock--On switch.
Link Cables
Additional link cables can either be purchased (Shure Part No. 95A1143; 305 mm—12 in.) or constructed using desired lengths of high--quality, 7--conductor, shielded cable (pin 1: shield) with 8--pin mini DIN connectors on each end. The maxi- mum length of a link cable will depend on the grounding con- siderations of this unbalanced line.
FP410 and Mixing Consoles
The FP410 can be used in conjunction with large mixing consoles to provide automatic mixing for talk shows, panel dis- cussions, and nightly news shows. Large consoles have chan- nel insert jacks so that external signal processing devices can be patched into individual channel signal paths. These jacks are normally line level.
The FP410 can be fed from these insert jacks and the FP410 output then fed to a submaster fader on the console. This arrangement allows the operator complete control of each channel via the console’s input control strip, while the the FP410 keeps the number of open microphones to a minimum, relieving the operator of having to open and close mic chan- nels.
SUPPLIED ACCESSORIES AND REPLACEMENT PARTS
Battery Tray Assembly | 90GJ2600 |
Bumper (Foot) Kit (4 in kit)) | . 90S8100 |
Control PC Board Assembly | 90B8368A |
Knob, Master & Phones | . 95A8238 |
Knob, Channel Gain | . 95B8238 |
Line (Power) Cord (FP410) | . 95A8231 |
Line (Power) Cord (FP410E) | . 95A8247 |
Link Cable | . 95A1143 |
Left Rack--Mount Bracket | . 53A8252 |
Right Rack--Mount Bracket | . 53A8253 |
