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In Case of Difficulty

This section describes the most common problems that might occur. If you are having
difficulties, please review this information and take any necessary corrective action. If you
still experience difficulties, contact the Vega factory or your sales representative.

Most Vega equipment provides years of trouble-free operation. However, as with all
electronics, problems might occur. If you have trouble with Vega equipment within the first
year of operation, it will be repaired under warranty (see below). Service for older units may
also be obtained from Vega; contact the factory or your sales representative for information.

Most difficulties are not due to equipment failure. Vega equipment is fully tested before
leaving the factory. Usually, problems are due to equipment application.

Often, the problem can be resolved by phone, avoiding downtime for unnecessary returns.
However, should repairs be necessary, Vega will promptly correct the problem and return the
unit. Return of both transmitter and receiver is recommended, allowing Vega to perform a
complete checkout and test of the entire system. This can be especially helpful for elusive or
intermittent problems

Battery

The most common problems with wireless intercoms are related to the beltpack batteries.
Exhausted batteries will cause numerous problems, including distortion, audible squeals and
howls, poor range, and off-frequency operation. Check batteries prior to each use, and replace
them if there is any question about their condition. It is also good practice to replace the battery
with a fresh unit when having any sort of problem occurs with the system, because a low battery
may affect system operation in subtle ways.

Vega recommends only new, fresh Duracell or Eveready alkaline batteries be used. No other
batteries tested by Vega provide equal life and equivalent reliability.

The only acceptable rechargeable batteries known to Vega are the Varta and Plainview, which
are true 7-cell (9 volt) designs. Even here, the usable life will be much less than for a Duracell
(usually three to four hours). Rechargeable cells (“ni-cads”) commonly sold are usually 7.2
volts instead of 9 volts and provide only a few minutes of operation.

Beltpack battery contacts must be clean and unbroken. Attempted forced reverse insertion of
a battery is practically impossible, but the attempt will often damage the battery contacts.

Interference

Vega wireless-intercom systems have been specifically designed to reject interference. However,
interfering signals might fall directly on the receiver frequency, making it impossible to avoid
problems completely. As mentioned above, this can be a particular problem if the receiver audio
is left open (receiver enabled) when the transmitter is turned off.

Problems with RF noise sources (fluorescent and neon lights, car ignitions, industrial
equipment, etc.) are quite rare. However, defective fluorescent lighting fixtures can generate
astonishing amounts of RF energy. Usually, repairing the fixture will cure the problem.
Normally functioning fixtures almost never cause trouble.

This situation is true for most other interference sources as well. That is, unless the
equipment is electrically defective, the interference will not adversely affect Vega wireless
equipment. When such a situation exists, the source has become a wideband transmitter and
nothing can be done to the wireless equipment to correct the problem that will not seriously
degrade performance. Fortunately, this type of problem is surprisingly rare.

12

Q PLUS

Summary of Contents for QX-6A

Page 1: ...Owner s Manual QX 6A QX 600 Wireless Intercom and Master Station QTR 2 QTR 600 Wireless Remote 099 0072B ...

Page 2: ...ory The master station is equipped with a maximum of six receivers for receiving up to six portables transmitting simultaneously on different frequencies The audio outputs of those receivers are combined and are connected to the audio input of the master station transmitter The master station transmits the combined audio on a frequency received by all portables By positioning the master station an...

Page 3: ...ame an unlimited number of QTR 2 portables may be used in direct two way simplex push to talk communications without a master station This mode of operation does not apply to QTR 600 portable units The QTR 2 QTR 600 operates from two 9 volt transistor radio batteries Use only high quality batteries See Section 8 Batteries for further details Vega offers a high capacity rechargeable battery option ...

Page 4: ...rtables These switches are normally used to disable the internal master station receivers if fewer portables are used than the number of receivers in the QX 6A QX 600 or if a portable goes out of range 4 Q PLUS Figure 1 Monitor select switch Nine position rotary enabled when LOC MON SEL push button is out Power on off switch Selects ac power dc power or power off Volume control Local headset volum...

Page 5: ... Slide switch selects wired intercom channel for wired intercom systems that have two channels such as RTS TRANSMIT Switch Three position slide switch disables transmitter in center position continuous transmit in ON position when master station is powered transmit when any receiver active in PTT position LINK Connectors Male female 3 pin XLR for link interconnect Link On Off Enables disables link...

Page 6: ... of the system receivers and the possibility of weak interfering signals being received which often results in very noisy system output Typical sources of interfering signals include spurious outputs from poorly adjusted two way radio transmitters harmonic output from FM radio transmitters radiated harmonic energy from clock signals in computers and other digital equipment leakage from CATV and MA...

Page 7: ...able that is the transmitter will always be on whenever the QTR 2 QTR 600 is powered 5 While the transceiver is out of its case adjust the microphone gain R14 if necessary refer to figure 2 Accurate adjustment will usually require the use of a deviation meter or service monitor However minor adjustments can be made by comparing audio levels from two different portables via the master station monit...

Page 8: ... dust cover and install a 1 4 A fuse in place of the 1 2 A 115 Vac fuse 4 If the master station is to be rack mounted external antennas likely will be needed For desktop use the whips supplied will be satisfactory 5 Mount the master station and connect the antennas Also connect power ac or dc or both to the unit 6 Plug in intercom cable s to the rear panel For Clear Com TW and RTS operation the se...

Page 9: ...is configuration the receiver audio is single ended and will be considerably lower in level than for the balanced configuration described above Only headsets with high efficiency receivers should be used if high earpiece volume levels will be needed There are several provisions in the QTR 2 QTR 600 and the QX 6A QX 600 to accommodate either dynamic or electret microphones Connections from the head...

Page 10: ... like most walkie talkies the QTR 2 sidetone adjustment can be set to provide sufficient sidetone for comfortable operation To set the QTR 2 sidetone adjustment remove the battery compartment door batteries battery spring and QTR 2 dust cover Referring to Figure 2 locate the sidetone adjustment potentiometer on the QTR 2 transmitter board assembly and set it fully CCW when the QTR 2 is used with a...

Page 11: ...PE SWITCH 1 2 3 4 5 6 DYNAMIC ELEMENT ON OFF ON OFF OFF ON 3 WIRE ELECTRET OFF ON OFF OFF ON ON 2 WIRE ELECTRET OFF ON OFF ON OFF N A Table 3 Switch S15 program for microphone type Figure 2 Location diagram for master station DIP switches R194 ...

Page 12: ...may affect system operation in subtle ways Vega recommends only new fresh Duracell or Eveready alkaline batteries be used No other batteries tested by Vega provide equal life and equivalent reliability The only acceptable rechargeable batteries known to Vega are the Varta and Plainview which are true 7 cell 9 volt designs Even here the usable life will be much less than for a Duracell usually thre...

Page 13: ...mage due to improper repairs finish or appearance items or malfunction due to abuse or operation under other than the specified conditions nor does it extend to incidental or consequential damages Some states do not allow the exclusion or limitation of incidental or consequential damages so the above limitation might not apply to you This warranty gives the customer specific legal rights and there...

Page 14: ... Audio Frequency Response 70 Hz to 7 5 kHz at 3 dB Controls Combined off on and volume control programmable push to talk mute transmit switch Indicator LED power ON Range To 1000 ft or more line of sight somewhat less under typical conditions Size 3 8 in 9 7 cm W 5 2 in 13 2 cm L 1 5 in 3 8 cm thick Weight 1 1 lbs 0 5 kg Temperature Range 20 C to 60 C Construction High impact ABS control panel one...

Page 15: ...Harmonics Better than 60 dBc Transmitter Spurs Better than 50 dBc Transmitter Frequency Deviation 37 kHz peak Receiver Sensitivity Better than 0 75 µV for 30 dB S N Receiver Image Rejection 75 dB minimum Receiver Distortion 2 worst case Receiver Ultimate S N 80 dB minimum 20 kHz flat Receiver Output Level 0 to 3 Vrms into 50 Ω 175 mW with balanced output Power 6 5 to 9 5 Vdc from 9 V battery Audio...

Page 16: ...iver Ultimate S N 80 dB minimum Intercom Interface Various programmed internally Power Supply 115 230 Vac 50 60 Hz 20 W maximum or external 11 5 to 32 Vdc Range To 1000 ft or more line of sight somewhat less under typical conditions Size 16 75 in 42 5 cm W or 19 0 in 48 26 cm W with optional rack mounting ears 10 0 in 25 4 cm D 3 5 in 8 89 cm H Weight 11 3 lbs 5 13 kg Temperature Range 20 C to 60 ...

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