Specifications

5
When the receiver is in the Menu or Edit mode, its audio
output is silenced. Once control-setting operations are
completed (or Escape is used), normal receiver operation
will resume with its audio output restored.
While in the Edit mode, if no action is taken for approxi-
mately 30 seconds (no buttons pressed), the receiver will
“back out” to the Menu mode. Similarly, after about 30
seconds of inaction in the Menu mode, the receiver will
“back out” to normal receiver operation with audio output
r
estored.
Receiver Functions
Function Menu Default Setting* Choices (Edit) ▲▼ Wrap-around**
(Receiver powers-up at Frequency)
▲▼ Frequency Lowest in band
†
200 discrete frequencies Yes
▲▼ Quit (exit Menu) QUIT Press Mode/Set to exit --
▲▼ Squelch SQ 15 dB SQ 15 dB to SQ 42 dB in 3 dB steps No
▲▼ Meter Hold MH OFF MH OFF MH ON Yes
▲▼ High-pass Filter HP OFF HP OFF HP –6 HP –12 HP –18 No
*
T
o r
eset to Default values, hold in the Mode/Set button while pr
essing the Power button to tur
n on the unit.
** Continue in the same Up/Down direction and choices “wrap around” to the other end of the range.
† Band C: 541.500 MHz; Band D: 655.500 MHz.
Table 1. Receiver Functions
Receiver Controls and Functions (Continued)
High-pass Filter
Internal high-pass filter circuitry may be set to four positions:
High-pass Off, or a 6 dB, 12 dB or 18 dB slope at 150 Hz. The
default setting is Off
(“HP OFF”). Increasing the slope of the
high-pass filter further suppresses unwanted low frequencies,
while maintaining the frequency response in the desired audio
range.
Meter Hold Setting
When activated (“MH ON”), this function permits the
bar-meters in the LCD window to capture and display the
highest-level “AF” audio modulation (a solid bar) and the
lowest-level "RF" signal (a flashing bar) received from the
transmitter. This is particularly useful when setting up the
system initially, during a sound-check, or when diagnosing
operating problems. The default setting is Off
(“MH OFF”).
When the Meter Hold is On, it is possible to reset it – to obtain
a new set of RF and AF readings – without turning it off-and-on
using the Menu/Edit functions. Simply press the transmitter’s
Power/Mute button once (to mute the transmitter) and
wait
until the r
eceiver’s Alert light comes on,
indicating the Mute
condition. Then pr
ess the transmitter’s Power/Mute button once
again, to un-mute the transmitter.
After the Alert light goes
out,
a new set of min/max RF/AF readings will be indicated on
the bar-meters. (Note that, depending upon the digital updating-
and-confirming sequence of the Mute condition data from the
transmitter, it may take several seconds for the Alert light
condition to change.
The Meter Hold function is not reset
until the Alert light has turned on, then turned off.)
Digital Tone Lock
™
Squelch
The 3000 Series employs a unique Digital Tone Lock squelch
system that provides enhanced rejection of interference. In
addition to providing highly effective control of unwanted noise,
the Tone Lock signal from the transmitter also conveys data on
the transmitter’s battery condition and mute status back to the
receiver for display.
The squelch level is adjustable from 15 dB (the default value) to
42 dB in 3 dB steps. Increasing the squelch level – also called
“tightening the squelch” – can cause a reduction in useable
range of the wireless transmitter, so use the lowest value that
reliably mutes the unwanted RF signals. (If interference is a
problem, first consider trying a different frequency.)
See pages 16-17 for illustrations.