WisyCom MRK980 User manual

MRK980 User Manual
ULTRA-WIDEBAND TRUE
DIVERSITY DUAL RECEIVER
SN: ________________
rev.01 (ref. FW 1.2)
Date: 21 October 2019

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GENERAL DESCRIPTION
Wisycom MRK980 is a true diversity, ultra-wideband dual channel receiver. With its 1090MHz
tuning range, it ensures the users have exceptional flexibility, combined with superb selectivity
and inter-modulation immunity, for best operating performances of the wireless microphone
systems. MRK980 also features an internal DSP processor, Wisycom famous Multicompanding
system, new Dante compatibility and a completely renewed user interface, which makes this
system easy and quick to setup.
The MRK980 is designed to be:
“Easy & quick to use” thanks to automatic setup functions (i.e. frequencies, squelch), remote
configuration utilities (Dante/Ethernet control connections), a display with intuitive contextual
menu navigation and shortcut buttons on the front panel.
“Extremely flexible”, with an incredible frequency agility of 1090MHz (VHF/UHF/DME); more
than one rack can be connected together through a simple ethernet cable to act as a multi-
channel receiver. Moreover the DSP board allows the units to work with several digital audio
outputs (i.e. AES/EBU, DANTE, …), with multi-companding compatibilities and the new
adaptive squelch function.
“Best in class performance”, thanks to the latest Wisycom technology, the unit has extreme
RF sensitivity and immunity plus superb audio quality.
“A durable & upgradable investment”, thanks to the very robust design (aluminum housing)
and the ability to upgrade/enhance the unit performances with a simple slot in card (pc-like
through the DEXB expansion bus)
MRK980 system is already set up for the unique PTT function (remote command), developed
and patented by Wisycom:
Simply pushing this button (PTT), the presenter initiates remote switching of the
receiver’s output, from the “main line” to the additional “intercom line”, in order to be
able to talk “off-air” directly with the technical team. Then all the PTT MICs can be
connected in pre-fad creating a clever intercom setup.

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SAFETY INSTRUCTION
•Read this safety instruction and the manual first.
•Follow all instructions and information.
•Do not lose this manual.
•Do not use this apparatus in the rain or near water.
•ATTENTION: supply the apparatus with the correct mains voltage and with the ground
connection. Check the power cord integrity.
•The power cord must be protected from damage.
•Do not install the apparatus near heaters or in hot environments, do not use outside the
operating temperature range.
•Mount the apparatus as indicated in the instruction, do not block side grilles from air
ventilation.
•If an external air filter is mounted, clean it regularly.
•WARNING: do not open the apparatus, RISK OF ELECTRIC SHOCK!
•Do not open the apparatus, only qualified service technicians are authorized to work on
it. The apparatus needs servicing when is not working properly or is damaged by liquids,
moisture or other objects have fallen into the apparatus.
•Use only accessories or replacement parts authorized or specified by the manufacturer.
•Do not supply more than seven MRK980 from the mains output, see power requirements
for other apparatus.
•Clean the apparatus only with dry cloths, do not use liquids.
•The ON/OFF is a double pole circuit breaker, but to ensure the complete disconnection of
the apparatus, disconnect the power cord.
•Provide the serial number and the purchasing date in front of the manual, it is needed to
have proper replacement parts or accessories from the manufacturer.
•When replacement parts are needed, use only replacement parts authorized by the
manufacturer. Substitution with not authorized parts could result in electric shock,
hazards or fire.
oPay attention to all the labels with warnings or hazards on the apparatus.
•WARNING: The apparatus is intended for professional use, anyway the manufacturer
alerts the user that the headphone output power of the apparatus could exceed the level
of 85 dB(A) of sound pressure level and this could be dangerous for hearings. Do not use
headphones with high power level or for a long time. Reduce the power or stop listening
in case of any kind of hearing problem.

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MAIN FEATURES
Two channels True Diversity receiver (full DSP processing)
Up to 1090 MHz bandwidth in the 170/1260 MHz range
Push to talk (PTT) enabled with dedicated outputs
Analogue, AES/EBU & Dante outputs (with redundancy)
Dante machine Synchronized mode →no sample rate delay!
Next Gen Multiband front-end filtering:
▪High Q moving filter 170-230 MHz
▪High Q moving filter 470-800 MHz
▪High Q moving filter 960-1160 MHz (DME) (or 806-810 MHz SAW filter for
Japan)
▪Country specific SAW filters:
USA 940-960 MHz or Japan 1240-1260 MHz
Wideband and Narrowband DSP-FM operation (SW selectable):
oNarrowband allows 50% more spectrum efficiency (200/250 kHz channel
density)
oNarrowband allows about 3dB extra sensitivity and noise immunity
Extreme low noise VCO with ultra-fast spectrum scan for optimal quick & easy setup
High contrast OLED display
Monitor & control through USB and Wisycom Manager 2.0 (computer SW)
Expansion slot for GPIO or future additional features

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TECHNICAL DESCRIPTION
The MRK980 is a professional dual diversity receiver for wireless microphone
reception especially designed for broadcast production, live stages, theatres and
top professional applications.
MRK980 key features are:
High immunity in a strong RF environment
Incredible switching bandwidth
Top class audio performances and flexibility thanks to the digital processors
High reliability and durability
One of the milestones in the design of the MRK980 is high reliability as most of
the circuit blocks in the receiver are completely independent from another.
Below you can see the schematic with an overview of main receiver functions.
Starting from the antenna inputs, each antenna can be independently powered
from a single power regulator monitored by the microcontroller.
For each antenna the RF signal is split to feed receiver 1 and 2 with a wide-band
splitter. This way any of the two receivers can be tuned to any frequency within
the tuning range, e.g. you can have receiver 1 in VHF and receiver 2 in DME
band.
Receiver 1 and 2 are true diversity receivers: each one consists of two receivers
tuned to the same frequency, hereafter called section A and section B. The
receiver 1 section A and the receiver 2 section A are connected to the antenna
A, the receiver 1 section B and the receiver 2 section B are connected at the
antenna B.

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Each receiver has its own demodulated signal and its own RSSI signal (Received
Signal Strength Indication); a microcontroller selects or combines signals from
section A & B to have the best audio. The demodulated signal is then sent to the
digital audio processor.
The data subcarrier is digitally filtered with a highly selective filter (bandwidth
3Hz). Each filter has its own data demodulator, one for medium speed data
detection at the output of the first filter and one at low speed data detection at
the output of the second filter. Both of the demodulators are connected to the
supervisory micro controller for data detection and signaling.
Digital audio processors (one for each receiver): the demodulated signal
is filtered by a low pass anti-aliasing filter and then converted into the digital
domain with a 96KHz/24bit audio A/D converter. The digital signal processor
(DSP), working in double precision, replicates all the analog functions with very
high accuracy, ultra-low distortion and without the typical analog problems such
as components tolerances or temperature drifts etc. The highspeed audio
algorithms maintains the audio delay at about 0.37 milliseconds, making it
ideally suited to live events and to keep audio delay as short as possible. The
DSP unit also filters and demodulates the data carrier and communicates all the
parameters and information to the supervisory micro controller. The audio
output goes to the digital outputs (AES3) or is converted in the analog domain
with a high quality 24 bits 96KHz D/A converter and an anti-aliasing filter.
The analogue audio signal is routed in three parallel ways, LINE, COM and
HEADPHONE MONITOR amplifier.
The headphone monitor amplifier is controlled by the buttons on the front panel
and by the volume knob. The monitor output depends on the squelch and on the
tone squelch only in the TSQ ON selection. In TSQ OFF and in TSQ ADV the
monitor output is muted only by the squelch control.
The two analogue audio ways, LINE and COM, have the same audio quality and
are controlled by the “Tone squelch matrix”. Each audio driver has a VCA for the
soft switching of the audio signal and the muting functions, controlled by the
supervisory microcontroller. After the VCA, an electronically balanced amplifier
drives the output signal, directly or thru a very low impedance screened audio
transformer (optional). The audio output without transformer can withstand up
to +52 Vdc of phantom supply with no damage and up to 100V with transformer.

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USER GUIDE
FRONT PANEL
MRK980 allows an easy and quick configuration using buttons, push knobs and
displays.
The front panel is functionally divided in the following section:
A –ANTENNA BOOSTER and INFRARED PORT: ON/OFF booster button
for A&B antennas and IRDA port.
B –RECEIVER 1 CONFIGURATION: display, menu and shortcut buttons.
C –RECEIVER 2 CONFIGURATION: display, menu and shortcut buttons.
D –MONITORING AREA: monitoring audio output on headphone jack
(6.3mm - ¼”)
E –RECEIVER POWER SWITCH: turn the receiver ON/OFF.NOTE: the devices takes 5
secs to turn OFF for safety reasons (e.g. accidental turn OFF)
RECEIVER 1 and RECEIVER 2
AREA A: RF Bars, MAIN and AUX LED indicates what output port is currently in use.
AREA B: Modulation bar and DATA led which indicates the Ethernet connection status
(ON/OFF)

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AREA C: Receiver display (Name, channel info, audio info, sub menu) and shortcuts buttons
(SYNC, SCAN, AUDIO, CH/GR) to quickly access the main receiver functions.
AREA D: action button to choose or exit while in the menu.
AREA E: rotary knob to scroll within the menu and choose different options (push) and lamp
indicator.
-Fixed Yellow (Warning): no audio on both COM and AUX outputs
-Red slow blinking (Alarm level 1): Tx battery level <25%
-Red fast blinking (Alarm level 2): Tx battery level <12%
-Red fixed (Alarm level 3): A or B antenna short circuit (pop up on
the display will also shows up “Overcurrent on antenna A/B”)
ANTENNAS BOOSTER
BOOSTER activates antenna power (phantom power) with 12VDC
(200mA max) and the green LED is illuminated. Blinking LED indicates
a fault condition. If this is the case, power down the device and check
for short circuits or overloads on the RF cables or the boosters.
Booster supply for antenna A and antenna B are independent,
switchable from the RADIO > OPTIONS menu.
MONITOR & POWER
Monitor 1 and 2 buttons activate monitor audio on
the jack output (6.3mm - ¼”), 1 and 2 respectively
per receiver (a green LED is lighted when audio is
enabled). Audio level can be adjusted with the rotary
knob. The red LED (CLIP) indicates a clipping in the
audio monitor output. The button labelled ‘headphones’ enables the advanced
monitoring options (e.g. Dante monitoring) configurable by the Audio or the
Dante sub menus.
Power ON/OFF powering switch turns on/offthe receiver. When in OFF
position both phases are disconnected from power. Note that to avoid
unintentional shutdowns, the device takes 5 seconds to turn off. During those
5 seconds (countdown on the display) the device is still working and the
switching off procedure can be interrupted by switching the MRK980 back on
before the 5 seconds countdown expires.

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LCD DISPLAY: MAIN VIEW
All the basic information about the receiver status can be found in the main
menu overview.
Here you can find the following info:
1. Receiver name
2. Current tuned frequency, Group, Channel and TV Channel
3. Tone Squelch Status (ON/OFF)
4. Squelch Level
5. Noise Squelch Level
6. Transmitter Battery status
7. Compander currently in use
Through the main menu on the LCD display and the LED bars for the RF level
and modulation the user has real time monitoring off the wireless channel in
use.
REAR PANEL
The rear panel is functionally divided into the following sections:
A –Main Power Supply
B –Redundant +12V DC Power Supply
1
2
3

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C –Word Clock I/O
D –Remote control module: redundant Dante connectors and redundant
Ethernet connectors
E –AES3 Digital output
F –Receiver 1 and Receiver 2 Audio outputs: Main, Aux and TRS
G –Antenna BNC I/O (lower part) and optional boards slot (upper
part)
MAIN MENU
To access the receiver main menu and the sub menus press the “ENTER”
button (A) or rotary knob (B).
Use the “EXIT” button to exit the sub menus.
Keep pressed “ENTER” or the rotary knob pressed to confirm your selection.
Scroll around the menu by using the rotary knob.
Presets
Use this to load or save presets to device. These presets include all the config.
Settings. You can also restore factory settings here. Press and hold ‘enter’
button to save setting.
Receiver IF Bandwidth
Here you can select either ‘wide’ (200kHz channel) or ‘narrow’ (100kHz
channel). Make sure you are using the correct setting. If you are using with a
standard Wisycom TX or a pack from another manufacturer (Sennheiser, Shure
etc) then set to ‘wide’. For use with the Wisycom narrow band TX (these have
the letters ‘NB’ in the manufacturer’s part number) this should be set to
‘Narrow’. N.b. Narrow band mode offers double the number of channels in a
given slice of spectrum. Narrow band also increases the receiver sensitivity by
3dB, equivalent to doubling the TX power.

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Squelch
From here you can set the precise RF level above which the audio will un-
mute. It is set in dBuV (dB relative to 1 microvolt, therefor 0dBuV is 1uV,
6dBuV is 2uV…). This can be set manually or using the automatic squelch
setting described below. Note: If the ‘Noise Squelch’ (see below) is set to one
of the levels other than ‘off’ then the audio will not un-mute unless both the
squelch level set is achieved and the required noise squelch criteria is also
met.
Automatic Squelch setting
This runs a sequence which measures the RF noise level on the channel.
Obviously the associated TX must be off when this routine is run. It is worthy
of note that the auto squelch setting is a legacy feature that is less useful
when the noise squelch is used as the noise squelch tracks the noise floor as it
changes and is looking for actual link quality rather than just the signal level.
The recommendation therefore is to not use this feature and use a low setting
of RF squelch and noise squelch.
Noise Squelch
This has ‘off’ and levels 1 thru 4 available. The recommended setting is ‘1’.
Noise squelch is a more powerful tool than RF squelch because it actually looks
at the quality of the signal from the TX relative to the noise floor on the
channel which can vary over time. With the noise squelch set to on you can set
the RF squelch to a much lower level. With the noise squelch set to ‘1’ the
recommended setting for the RF squelch is 3dBuV.
Note: noise squelch setting ‘1’ means a signal to noise ratio of 60dB measured
before any companding. This is adequate for a reasonable link quality. Levels 2
thru 4 are for higher S/N ratios and may mean that your audio will mute when
you still have a usable signal, this is why we recommend setting to ‘1’.
Diversity Mode
If this is set to ‘RF Level’ then the diversity antenna selection occurs based on
which antenna is producing the most signal level. If it is set to ‘Channel quality’
then this choice is based upon which has the best link quality (S/N Ratio). The
recommended setting is ‘Channel quality’.
Note: although it might be thought that the antennas ‘switch’ from one to the
other, actually, the Wisycom true diversity system crossfades between

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antennas. When a similar quality of signal is being received by both antennas
they are mixed together equally so any noise is reduced by 3dB thus
increasing the absolute sensitivity of the receiver by the same amount.
RF Bands
The RF Bands menu allows the user to manage the internal MRK980 band
filtering section to increase the receiver protection level on the entire
bandwidth. This matrix allows to choose for each available band either a
manual or an automatic filter setup.
When the automatic selection is enabled the receiver will automatically assign
itself the filter based on the band in use.
E.g. Receiver one tuned on 514.000MHz and RF Bands on AUTO: the receiver
will filter the band on the UHF and exclude DME and VHF. The same if you tune
the receiver one on 972.000MHz: the AUTO function will filter only DME band
while excluding UHF and VHF.
Keep in Mind that the AUTO setting will affect both the RF input as well as RF
output, so if you plan to use more than a unit in daisy-chain (cascade), tuned
in different bands (e.g. unit 1 in UHF, unit 2 in DME), you must enable the
band manually by switching ON for the bands you plan to use.
Receiver operating mode
Is selected to ‘normal’ then the receiver is working with normal sensitivity and
is very immune to intermods being produced in the receiver circuits. In ‘High
sensitivity’ mode then the receiver circuitry is optimized for absolute
sensitivity, but there is a higher risk of intermods when lots of signals are
present. The recommended setting is ‘normal’ in any situation where there are
more than a handful of channels in use in the same band.

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Dante
Use the Rotary knob to configure the receiver as the Headphones Master via
Dante, allowing the receiver to act as a central monitoring point for your
system. You can add additional Dante Groups.
Channels in the same Group can be monitored by pressing and holding the
headphones button on the front panel, in the monitoring area.
Walk test
The WALK TEST function records the RF level
of the two antenna inputs, separately, for a
total time of 90 seconds (up to 24 hours if
launched via Wisycom Manager). Using the
first button, it is possible to choose what the user prefers to monitor: the
antenna A or B RF Levels, max values or both antenna levels separately.
To do a Walk Test press START and walk around your working area with a
wireless transmitter tuned to the frequency in use on that receiver. While you
do this the MRK980 will record the RF levels and gives you a clear image of the
RF performance of your setup, to make you sure that there is no evidences of
signal dropouts, which could compromise your wireless coverage.
Once you have done, push the 3rd button (EXIT) to leave this function. The
“golden rule” would be to have the signal level of “MAX AB” never lower
than 20dBµV (10µV).
In case you don’t achieve this value in the walk test we suggest you to verify
your cabling, the antenna boosters or change the antenna positioning.
Note: the scale for RF level is the same chosen for the Squelch level (i.e. dBuV or
uV).
Options
This menu item allows selection, viewing of many functions:
➢‘Name’ – This shows the current name of the receiver channel that will
display on the tops screen and on the software. Pressing the rotary
knob allows this to be edited. It can also be edited via connected
software.

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➢‘Boost’ – This selects which antennas are powered for active antennas
when ‘BOOSTER’ (phantom power) is selected from the front panel.
This would normally be set to ‘A + B’, you would only turn the booster
power off to one of the antennas if you had two different antennas and
one did not need power, though this would be an unusual
configuration.
➢‘TX battery monitor’ – This can be used to turn on or off the display
of battery info on the top screen. This would normally be on.
➢‘Display’ – This allows setting of OLED display brightness, ‘Low
timeout’ the time before the display dims and ‘OFF timeout’ sets the
time before the displays turns off completely and can be set up to 4
minutes. Note: It is not possible to have the display stay on
permanently as it would seriously reduce the life of the OLED.
➢‘RF LEV. Bars’ –This selects the function and behaviour of the LED
bargraph (RF. LEV (dBuV) on the front panel:
▪‘RF’ –This will show the actual RF level on each of A and B antenna.
▪‘LQ’ –This will show the link quality of the signal received on each
antenna. Link quality is derived from the actual signal to noise ratio
from the TX on each RX antenna. This is a more useful indication than
RF level as the RF level can look artificially high if there is a lot of
noise on the channel.
▪‘LQ exp’ –This is as ‘LQ’ above, but the scale has been expanded so
the bars reach full scale for a lower signal to noise ratio. This is useful
where the system has been setup and an operator with limited RF
experience is watching the unit to avoid unnecessary alarm if the
display is not full scale in the normal mode. Full scale in this mode is a
perfectly usable signal. The normal LQ mode only allows engineers to
see a much wider dynamic range but is not needed in many instances.
▪TX Mode –This is the mode that is very useful for non-skilled RF
operators once the system has been setup and tested and is great for
use during the actual show. This shows the RF level on the A
bargraph, but with the scale expanded so that now FSD is 30dBuV
and not the 70dBuV on the normal scale. Please note that this shows
the RF level of the higher of either A or B antennas. The B bargraph
shows the expanded LQ scale as described above and is also the best
of either A or B.
▪‘TX Mode RF’ –This shows the RF level for both A and B antennas
with FSD at 30dBuV and no LQ display.
➢‘Info’ –This allows the serial number, the frequency range of the unit,
temperatures, internal voltages, ‘booster diagnostic’ (this is useful for
checking that active antennas are drawing the correct current and that
the RF feeder cable is not open or short circuit), Hardware version,
Firmware version and alarms to be viewed. It also allows the IP

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address to be viewed and set. Also in the IP menu you can turn DHCP
on or off (DHCP is useful where the MRK980 is connected to a switch
with a router providing a DHCP server as it automatically allocates an
IP address to the unit). You can also view the MAC address of the
ethernet and Dante adaptors.
➢‘Working country’ –This enables the setting of the unit to global
regions by adapting the TV Channel readout on the main display to
reflect your local allocations.
➢‘RF Test’ – This gives an accurate numeric readout of the signal
strength on the A and B antennas. It also displays the ‘Tsq mod’ which
is the modulation level of the tone squelch from the TX. This is an
engineering mode that is not usually needed in normal operation.
➢‘Activation code’ –This menu item allows the entry of a code to
unlock new features or compander modes.
CHANNEL / GROUP QUICK MENU
The CHANNEL-GROUP menu enables the user to edit channel, channel group
and frequency of the selected receiver. To change group (00 to 39), channel
(00 to 59) or frequency scroll the rotary knob until you find the desired one,
then keep ENTER pressed to confirm or EXIT cancel.
To edit the frequency of the selected channel (it must be UNLOCKED to be
modified), press the middle button and change it with the knob (25Khz steps).
Press the knob to move between MHz and KHz. Confirm or exit with the
buttons. Note that the modified frequency will be saved into the MRK98
frequency plan, shared by both Rx1 and Rx2, so be sure to select a different
channel/group for each receiver when tuning frequency manually or both
receivers will be tuned to the same frequency.
Connecting with your computer to the device via Wisycom Manager helps
speed up the frequency management procedure, with several dedicated
functions and a user friendly interface.
Group name
The first line inside the Options Menu is GROUP NAME; with
this function it is possible to assign or change the name of a

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group of channels. This short name (8 characters) is displayed
to the right of the group number in the main display overview.
First chose the group and then press the knob to confirm. You will
be able to edit any character of the group name by rotating the knob. Push the
knob to edit the next character and the keep pressed ENTER to confirm or EXIT
to cancel.
As shown in the above picture, the display area has 3 rows with:
1) Channel number (0 to 60) and Channel frequency (in
25kHz step)
2) Group number (1 to 40) and group name (8 char.)
3) Group description (30 char.)
The MRK980 has 40 groups of 60 channels each which means 2400 preloaded
frequencies, more than any other wireless microphones system.
By connecting through the PC with the Wisycom Manager, it is possible to
hide/unhide single channels or even complete groups of channels: once hidden
those items are not shown any more on the channels or groups selection on
the device.
With this software it is also possible to lock/unlock channels or groups: when a
channel is locked, it is not possible to change the frequency from the receiver
CH/GR menu. Locking a group will lock all the channels contained within it.
When a channel or a group is locked, at the left of the group name in the
Chan-Group menu will appear a “Lock”icon. When the lock picture is shown,
the central button is not displayed, so changing frequency is not possible.

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AUDIO MENU
This menu item allows selection, viewing of many functions:
‘Compander’ – This enables the setting of the Compander you want to
work with. The MRK980 features a multiple compander system which
includes Wisycom ENR and ENC plus various other companders which allow
you to work with a large range of transmitters.
Thanks to the DSP board, it is possible to choose different types of audio
processors. MRK980 supports, as standard configuration, the following type
of “Companding system”:
Use the buttons to save or exit from this function. Depending on selected
noise reduction system, tone squelch function and transmitter battery
status could be enabled or disabled (since not all the wireless microphones
have this enhanced functionality).
‘Tone Squelch’–This function is an advanced option whose behavior
depends on the selected noise reduction system. This chapter explains
Tone Squelch operations when associated with a Wisycom wireless
microphone with the ENR-WISY or ENC-WISY as active noise reduction
system. Other types of wireless microphones could have different
behavior or could not work properly. The tone squelch selection could be
OFF, ON or ADV (advanced). After ‘SAVE’of tone squelch is selected, a
NONE-
d50
NO compander, 50µs de-emphasis
Analogue battery data & PTT (Wisycom®)
NONE-
d75
NO compander, 75µs de-emphasis
Analogue battery data & PTT (Wisycom®)
ENR-
WISY
Wisycom ENR compander, noise optimized
Digital battery data & Ptt (Wisycom®)
ENC-
WISY
Wisycom ENC compander, voice and high-fidelity
optimized
Digital battery data & Ptt (Wisycom®)
FLAT
No selected compander, test purposes only

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CONFIG submenu appears on the right. Enter on the CONFIG submenu
to change the setting of the chosen Tone Squelch (see matrix below).
With the knob and the buttons, it is possible to choose, for any one of
the three TSQ modes, the status of the audio outputs LINE and COM and
in the TSQ ADV mode it is possible to choose the audio routing to outputs
LINE and AUX, when the transmitter PTT button is either pressed or
released. The dot in the circle on the left of the display shows the actual
setting off the tone squelch function.
Tone Squelch OFF enables the audio output on LINE and AUX
connectors even when no pilot tone is received from the TX, it will be
muted only by the Noise and/or the RF level squelch if signal is not good
enough.
Tone Squelch ON enables the audio output on LINE and AUX only if the
transmitter sends the correct identification pilot tone signal (Tone
Squelch).
Tone Squelch ADV on transmitters, this gives more options for audio
routing and GPI signaling (GPI only if Expansion board EXP1 is installed)
Note: Tone Squelch doesn’t replace RF squelch or Noise Squelch. For
the best performances remember to use Tone Squelch together with at
least one of the two options above or, preferably all three (e.g. Tone
Squelch ON and RF Squelch @ 6BuV).

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TREE MENU
MAIN MENU
Preset
Load
Save
Restore Factory Settings
Noise Squelch
OFF / 1 : 4
RF Squelch
OFF / -6dBuV +60dBuV
RF Squelch Autoset
Start
Squelch ON Delay
OFF : 2000ms
Diversity Mode
RF Level / Channel Quality
Receiver Operating Mode
Normal / High Sensitivity
Audio Expansion Board
GP OUT 1
OFF / RF Squelch RX1 / RF Squelch RX2 /
Noise Squelch RX 1/ Noise Squelch RX 2 /
PTT RX1 / PTT RX2
GP Out 2
OFF / RF Squelch RX1 / RF Squelch RX2 /
Noise Squelch RX 1/ Noise Squelch RX 2 /
PTT RX1 / PTT RX2
Ext. Audio Monitor
Enabled / Disabled
Info
Serial
Model
Temperatures
Exp. Board supply diagnosis
HW EXP board rev.
EXP board option
Walk test
Options
Name
Display
RF Level bars
RF / LQ / LQ exp / TX Mode / Tx Mode RF
Booster
DANTE Sample Rate Converter
Activation Code
RF Bands
170 - 230MHz (Auto / ON)
470 –810MHz (Auto / ON)
940 –1260MHz (Auto / ON)
Tx Battery Monitor
ON / OFF
External DC Alarm Threshold
OFF / 10:28V
Working Country
Europe / USA / Japan / China / Australia
Info
IP
Static IP
DHCP
Subnet Mask
Default Getaway

MRK980 User Manual
rev.01
19
Mac Address
Dante mac Address 1
Dante Mac Address 2
Serial
Range
RF Test
Temperatures
Supply Diagnostic
Booster Diagnostic
HW
FW
Alarms
AUDIO MENU
Channel Modulation
Wide / Narrow
Compander
ENR / ENC / NONE d50 / NONE d75 /
FLAT
Tone Squelch
Selection
ADV / ON / OFF
Configuration
On Delay
OFF to 2000ms
Audio Settings
Main Selector
LINE / MIC
Main Audio Gain
-24dB : +24dB
Main Out Level
0dBu : 24dBu
TRS Out Level
-10dBu : +14dBu
AES3 / EBU Gain
-24dB : +24dB
AUX Selector
LINE / MIC
AUX Audio Gain
-24db : +24dB
Aux Out Level
0dBu : 24dBu
Main Ground / Lift
Ground / Lift
Aux Ground / Lift
Ground / Lift
TRS Ground / Lift
Ground / Lift
Calibration Tone
Calibration Tone (OFF / ON)
Mode (Tone / Sweep)
Output Selection (MAIN / OUT / MAIN +
OUT)
Output Level (-36:+24dBu)
Frequency (444Hz / 1KHz)
Signal Phase
0 / 180°
Digital Audio Info
AES Sample Rate
External World Clock
DANTE Sample Rate