Q700 7
Programming System Frequencies
Summary: This section describes the proce-
dure for programming frequencies from the
master station control panel.
System Frequency Info
The Q700 is shipped from the factory on
default receiving and transmitting
frequencies (center of the split). In order
to operate the system, these frequencies
must be reset to those authorized for
the location where the system will be
used. This may be accomplished via the
front panel controls on the MS-700
master station, or via a computer with
the optional QPK-1 programming kit. In
most cases, the frequencies of the Q700
will seldom be changed, and
programming from the front panel of
the MS-700 will be more than adequate.
All frequencies in the Q700 are based
upon fixed frequency ranges, with the
actual frequencies being determined by
the starting frequency of the particular
range, plus the channel number (0001
to 1200) multiplied by 0.025 MHz. For
the US and Canada, the available
frequency ranges are as follows:
470 – 500 MHz
500 – 530 MHz
530 – 560 MHz
560 – 590 MHz
590 - 620 MHz
620 – 650 MHz
650 – 680 MHz
680 – 710 MHz
710 – 740 MHz
Other frequency ranges will be
available for international use; consult
the Vega factory for more information.
Please also note that the operating
frequency range of each transmitter
and receiver is set at time of
manufacturing, and it is impractical to
change this range at a later date.
The operating ranges for a system are
printed on the FCC labels on the master
station and the beltpacks.
Important: In a particular system, the
receive and transmit ranges must be
separated by one range. For example, if
the base transmitter operates in the 590
to 620 MHz range, the base receivers
may not operate in the 560 – 590 or
620 – 650 MHz ranges. In this case, the
receivers can operate in the ranges from
650 to 740 MHz. All master station
receiving frequencies must be in the
same range.
To program a specific frequency, first
make certain that the desired
frequencies are within the operating
range of the unit. Then subtract the
lower band limit frequency from the
desired frequency. When this difference
is divided by .025 MHz, the channel
number is obtained.
For example, assume that the desired
frequency is 674.775 MHz. Since the
start of this band is 650.000 MHz, the
arithmetic is:
Therefore, the channel number is
"991", and this should be entered into
the front panel digit select switches as
"0991".
Programming System
Frequencies using the Front
Panel Controls
A 2.5 mm miniature stereo cable is
included with the MS-700 and is
required in order to program the BP-700
beltpacks (replacement cables may be
purchased at an electronics store).
To program one of the master station
receivers or the master station
transmitter, set the function select
switch to the correct position. For
example, set the function switch to "3"
to program receiver number “3”, or "7"
to program the master station
transmitter. Then set the channel digit
select switches to the correct value,
such as "0991" in the above example.
Then momentarily press the "program"
674.775
-650.000
= 24.775
24.775 / .025 = 991
pushbutton. If programming was
successful, the "program" red LED will
flash briefly followed by the “verify”
green LED flash to indicate successful
completion. Once programmed, the
frequency will be stored internally and
the unit will go to this frequency each
time the master station is turned "on".
Frequencies may also be verified via
the front panel controls without
reprogramming the existing frequencies.
Set the function select switch to the
receiver or transmitter whose frequency
is to be verified, and the digit select
switch to the channel number
corresponding to the desired frequency.
Depress the "verify" pushbutton on the
MS-700 front panel. If the programmed
channel number matches the channel
number stored in the receiver or
transmitter, the "verify" green LED will
flash. If no LED flash is observed, then
the channel numbers do not match.
To program the beltpacks, make
certain that they are turned "on" and
have good batteries. Then plug one end
of the 2.5 mm cable into the 2.5 mm
connector on the front panel of the
MS-700 and plug the other end into the
2.5 mm connector on the first beltpack.
Set the function select switch to "8"
to program the beltpack receiver, or "9"
to program the beltpack transmitter. Set
the channel switches in the same
manner as for the master station and
push the "program" pushbutton to set
the operating frequency of the beltpack
transmitter or receiver. Program both
frequencies, then proceed in the same
manner for the other beltpacks.
