Davicom FMBM-01 User manual

FMBM-01/-02
AM-FM Broadcast Monitor
Reference Manual
MAN1024
Version 2.0
March 2015
Davicom, a division of Comlab Inc.
2300, Leon - Harmel, suite 220, Quebec, QC, Canada
G1N 4L2
Tel: [phone] Fax: [phone]
w w w . d a v i c o m . c o m

Man 1024
Davicom AM-FM Broadcast Monitor
Reference Manual
www.davicom.com

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Table of Contents
1 General Information...........................................................................................................4
1.1 Limited Warranty..........................................................................................................4
1.2 Safety .........................................................................................................................4
2 Introduction........................................................................................................................6
2.1 Specifications...............................................................................................................7
3 Description, Installation & Connections .............................................................................8
3.1 Hardware.....................................................................................................................8
3.1.1 Front panel............................................................................................................8
3.1.2 Back panel & screw-terminal pinout......................................................................9
3.1.3 Cables, connections and accessories.................................................................11
3.1.4 Power supply.......................................................................................................11
3.2 Software ....................................................................................................................12
4 Operation.........................................................................................................................13
4.1 Local operation with front-panel display & buttons.....................................................15
4.1.1 Default display.....................................................................................................15
4.1.2 Menu selection mode..........................................................................................16
4.2 Remote operation through Davicom unit ...................................................................19
4.3 Remote operation with a PC......................................................................................24
4.4 Settings & adjustments..............................................................................................29
4.4.1 Program de-emphasis jumper (JP7) ...................................................................29
4.4.2 Relay mode selection jumpers (JP2-JP6) ...........................................................29
4.4.3 Power monitor filter jumper (for AM mode, JP1) .................................................29
4.4.4 RF alignment.......................................................................................................29
4.4.5 Pre-emphasis (JP9-JP10)...................................................................................29
4.4.6 Peak Integration Time Constant (JP8, JP11) ......................................................30
4.4.7 RF level calibration..............................................................................................30
5 Support/Contact...............................................................................................................33
6 Appendix A ......................................................................................................................34
7 Appendix B ......................................................................................................................35

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1 General Information
1.1 Limited Warranty
Comlab Telecommunications Inc. warrants all its products to be free from manufacturing
defects for a period of two years after delivery to the original purchaser. All warranty returns
must be authorized by a Comlab representative.
The limitation of liability under this warranty shall be to repair or replace any part of the
product, which proves to be defective after inspection by Comlab. This warranty shall not
apply to any Comlab product that has been disassembled, modified, physically or electrically
damaged, inappropriately installed, or any product that has been subjected to conditions
exceeding the applicable specifications or ratings.
Comlab assumes no liability for any direct, indirect or consequential injury, loss, economic
loss, damage, fines or penalties incurred through the use, or inability to use Comlab products.
Comlab products are not intended for use in medical, life-saving, life-sustaining or critical
applications. Comlab customers using or selling Comlab products for use in such
applications do so at their own risk and agree to fully indemnify Comlab for any damages
resulting from such improper use or sale.
Comlab reserves the right to make design changes to its products without incurring any
obligation to make the same changes to previously purchased units.
This warranty is the full extent of obligation and liability assumed by Comlab with respect to its
products. Comlab neither makes nor authorizes any person or company to make any other
guarantee or warranty concerning its products.
1.2 Safety
The Davicom FMBM should be installed by qualified technical personnel only.
Installation of this device by an unqualified person could result in hazardous
conditions to the installer or other personnel, and/or damage the FMBM or other
equipment. Ensure that proper safety precautions have been taken before
installing this FMBM and any associated equipment.
The FMBM is designed to meet standard safety requirements, and it is extremely important
that it not be modified in any way. Modification of this equipment will void the warranty and
could pose a hazard to the user of this equipment or to maintenance personnel. Service of
the FMBM should be performed by qualified technical personnel who are familiar with the unit.
Note that the Davicom FMBM is designed for indoor use in a dry location, Installation and
operation in other locations could be hazardous.
Depending on your installation, the FMBM may contain HIGH VOLTAGES. Exercise caution
when working in and around the unit if it is connected to your site wiring.

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Regulatory Compliance
FCC (USA)
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may
cause undesired operation.
NOTE: This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the user will be required to correct
the interference at his own expense.
Changes or modifications not expressly approved by Comlab may void the users authority, as
authorized by the FCC, to operate this device and should not be made. See 47 CFR Part
15.21. Information to the User. The user manual or instruction manual for an intentional or
unintentional radiator shall caution the user that changes or modifications not expressly
approved by the party responsible for compliance could void the user’s authority to operate
the equipment.
Industry Canada
This Class A digital apparatus complies with Canadian ICES-003.

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2 Introduction
Davicom’s AM/FM Broadcast Monitor (FMBM) is designed to be used as a receiver for on-site
and off-site monitoring of broadcast transmitters. It offers a large number of advanced
features in a compact, low-cost package. Remotely controllable through Davicom’s line of
intelligent site monitoring systems, the FMBM can also be manually configured and operated
without a Davicom unit.
The FMBM offers the following features:
Synthesized tuning
Non-volatile configuration storage
On-site monitoring of transmitter power
Off-air monitoring of receive signal strength
FM deviation measurement and alarms
Multiplex Input/Output (model -02 only)
Selectable pre-emphasis on analog and digital audio outputs (model -02 only)
AES digital audio output option (model -02 only)
Carrier frequency measurement and alarms
RDS/RBDS decoding
Balanced audio output on back panel and headphone output on front
Alarm contacts for:
ostereo absence
ohigh deviation
olow deviation
olow power
ocarrier frequency drift
All alarm levels are settable by the user, locally or remotely
Full remote control and monitoring through any Davicom unit via the USB interface
EMI / RFI Shielded.
Designed for full and easy integration into the Davicom’s powerful control and monitoring
structure, the FMBM gives you the benefit of remotely monitoring the key RF parameters of
your AM or FM transmitter to ensure regulatory compliance.

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2.1 Specifications
AM Band
Tuning range
520-1710 kHz
Tuning step
1 kHz, 10 kHz (selectable)
FM Band
Tuning range
88-108MHz
Tuning step
50, 100, 200 kHz (selectable)
Program de-emphasis
50 or 75 uS (selectable, internal jumper)
Low-level (Antenna) input
Connector
F Type
Input range
-70 to -33 dBm, Absolute Maximum: +3 dBm (2mW)
High-level input
Connector
BNC
Input range
-16 to +20 dBm, Absolute Maximum: +26dBm (400mW)
Multiplex Input/Output (model -02 only)
Connector
BNC (Menu selectable Input or Output Mode)
MPX IN
MPX Input level adjustable from rear panel
MPX OUT
MPX Output level set to 3Vpp
Carrier frequency drift measurement
(FM band only)
Accuracy
± 0.3ppm for a temperature range of 0 to 50°C
Resolution
100Hz
RDS/RBDS decoder
Type
PS, PTY, RT
Analog audio outputs
Type
Balanced
Output impedance
600Ω
Connector
Pluggable screw terminal
Level
Preset to +8dBu
Digital audio output (model -02 only)
Level
Preset to -14dBFS at 100% modulation
Headphone output
Load impedance
> 8Ω
Connector
3.5mm (standard stereo)
FM deviation monitor
Connector
Pluggable screw terminal
Output impedance
600Ω
Level
0 to 7Vdc, 33 mV/kHz, 75kHz set for 2.5V out
RF power monitor
Connector
Pluggable screw terminal
Output impedance
600Ω
Level
0 to 7Vdc (adjustable), 0.5 V/dB
Peak Detector (model -02 only)
Integration time
1 ms, 2.5 ms and 5 ms (selectable, internal jumpers)
Alarm relays. Normally open, isolated
contacts that can be individually set to
normally closed by internal jumpers
Absolute maximum rating
0.6A @ 125Vac, 0.6A @ 110Vdc, 2A @ 30Vdc
Connector
Pluggable screw terminal
Alarm functions
Low power
Frequency drift
High deviation
Low deviation
Stereo absence
USB interface
Function
Allows remote control and continuous alarm monitoring through
compatible Davicom units
Also used for firmware upgrades
Software remote control
Through Davicom Unit
Frequency Band
FM peak-deviation limit
FM deviation peaks-per-minute count
FM low-deviation limit
FM low-deviation timeout
FM frequency-drift limit
FM RF alignment
Low-power limit
AM low-modulation limit
AM low-modulation timeout
Manual control
Via front panel
pushbuttons
Same functions as software remote control above plus:
RF input selection
Headphone volume adjustment
Power reference level
Power Supply
Voltage, Max Current
12 Vdc, 500 mA with all alarm relays on
Dimensions & Weight
1 RU, half width, 1.0 kg (2.2 lbs)
Table 1. Specifications

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3 Description, Installation & Connections
3.1 Hardware
3.1.1 Front panel
Figure 1. Front Panel
2-Line, 16 Character LCD: Backlit display shows current readings and displays menu
settings.
Up Button ˄: Increases headphone volume in Default mode and scrolls forward through
configuration menu in Menu mode.
Down Button ˅: Decreases headphone volume in Default mode and scrolls backward
through configuration menu in Menu mode.
Power LED: Indicates that unit is powered-up and operational.
Menu Button: Shifts to Menu mode when in Default mode and selects menu item when
in Menu mode.
Alarm LED: Shows aggregate status of all alarms in FMBM.
Power Monitor Calibration: 10-turn potentiometer, allows calibration of back-panel RF-
Level DC output. See Section 4.4.7.
Headphone Jack: 3.5 mm jack for standard stereo headphones.
Up Button
2-line, 16 Character LCD
Down Button
Menu Button
Power LED
Alarm LED
Headphones
Power Monitor Adjustment

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3.1.2 Back panel & screw-terminal pinout
The FMBM’s back panel has plug-in screw terminal connectors for the alarm relay outputs,
the RF-Level and FM Deviation voltage outputs and for the balanced audio outputs. It also
has the input connectors for the Antenna and High-Level RF inputs as well as the USB and
12Vdc power connectors. Model -02 has a multiplex input/output connector and an optional
AES digital output.
Figure 2. Back panel of FMBM-01 (Top) and FMBM-02 (Bottom)
Alarm, Monitor & Audio Outputs (see Figure 3 for details)
Antenna Input*: Type F connector for low-level RF input from 75Ω antenna.
Ground Terminal: Chassis ground lug.
High-Level RF Input: Input for use with on-site directional couplers or other signal
sampling devices that allow the FMBM to measure and monitor transmitter levels. Note
that when using the high level input, nothing must be left connected to the low level
(antenna) input and vice-versa because this could cause improper calibration. The
corresponding RF Input selection must be made in the operating Menu.
Alarm, Monitor & Audio Outputs
Antenna Input
High-Level RF Input
USB Connector
Ground Terminal
12Vdc Connector
Alarm, Monitor & Audio Outputs
Ground Terminal
12Vdc Connector
USB Connector
High-Level RF Input
AES Digital OUT**
MPX IN/OUT
Antenna Input
MPX IN Level

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12Vdc Power Connector: Davicom standard XLR power connector. The corresponding
female XLR connector is supplied with the FMBM’s accessories.
USB Communications (Type B) Connector: Connector for interface to Davicom units or
to a PC.
AES Digital Output** (Mini XLR connector, Model -02 only): optional AES digital output
with jumper selectable rates of 44.1 kHz, 48 kHz, 88.2 kHz and 96 kHz. The connector
pinout is given below:
The recommended Mini XLR female connector for the AES Digital Output is a TA3FSH
from Switchcraft Inc. This connector is not provided with the unit. See Appendix B for
AES digital output option installation instructions.
MPX IN/OUT (BNC connector, Model -02 only): multiplex input/output (selectable from
the on-screen menu). Can accept more than 1Vpp in input mode and provides up to
3Vpp in output mode.
MPX IN Level (Model -02 only): MPX In level adjust.
*Attention: To ensure correct operation, make sure the antenna is not located close to sources of RF interference.
** The option must be installed to have digital AES audio signals present on the rear panel mini XLR connector. The
AES digital output option can be installed by the user at any time after the initial purchase (Ordering number: FM-AES)

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Figure 3. Alarm Relay, Monitor and Analog Audio output pinouts (Model -01: Top, Model -02: Bottom)
Alarm Relay Outputs: The alarm relays are factory configured as normally open (NO),
but can be changed to normally closed (NC) by setting internal jumpers. See Section
4.4.2 for details on setting these jumpers.
RF PWR Monitor Output: This output produces a voltage that is proportional to the RF
Power level at 0.5V/dB. Its level can be adjusted via the Power Monitor Calibration
Menu item. See Section 4.4.7. NOTE: If the peak deviation exceeds 100 kHz, the RF
PWR Monitor Output may be affected.
DEV. OUT (Modulation) Monitor Output: This output produces a voltage that is
proportional to the FM Modulation (Deviation) at 33mV/kHz. It is factory set to produce
2.5V for 75 kHz of deviation.
Audio Outputs: Balanced audio outputs for Left and Right audio signals. Default level is
+8dBu and is adjustable from 0 to +10dBu through the Audio Level Menu item.
Adjusting the analog audio level will also adjust the digital audio level.
3.1.3 Cables, connections and accessories
Standard accessories include a USB cable, a 4-pin female XLR connector for 12Vdc power
(+12V is on Pin 4 and Ground is on Pin 1) and plug-in screw-terminals for the Alarm Relay,
Monitoring and Audio outputs.
3.1.4 Power supply
The FMBM operates from any standard 12Vdc Power Supply, such as the Davicom
ILPS5012N, that can source up to 1A.

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3.2 Software
The included CD contains the USB driver for the FMBM, the firmware update software, the
firmware file itself and an electronic version of this manual.
The FMBM itself requires no other special software installation. It is normally delivered with
its operating firmware pre-installed.
It is however possible to update this firmware when new features or bug fixes become
available. The firmware can be updated by following the procedure given in Appendix A.

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4 Operation
The Davicom FMBM can be operated in three different modes.
The first mode uses the front-panel LCD and 3 control buttons. This is for stand-alone
operation where the FMBM’s alarm contacts are connected to external alarm monitoring
status inputs.
Figure 4. Stand-alone operation. Described in Section 4.1.
The second mode operates through any Davicom Intelligent Remote Control system that is
running firmware version 5.42 or higher. This mode offers remote control capability and close
integration with the Davicom’s automation structure.

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Figure 5. Operation with a Davicom unit. Described in Section 4.2.
The third mode is via the FMBM’s back-panel USB connector in conjunction with a
communications-terminal program such as HyperTerminal, commonly found on Windows
Operating Systems. The FMBM’s USB communications driver must be installed prior to
operating in this mode. This driver is included on the CD supplied with the FMBM.
Figure 6. Operation with a PC. Described in Section 4.3.

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4.1 Local operation with front-panel display & buttons
4.1.1 Default display
If an appropriate high-level signal or antenna is connected to the unit and it is powered from a
12 Vdc power supply, the FMBM will automatically start displaying the receive frequency and
modulation level, alternating between the frequency drift and signal strength. Display of
stereo presence/absence (ST/MONO) is permanently present on the bottom right of the LCD
screen.
Note that at all times when in this Default display mode, the UP and DOWN buttons control
the audio output level going to the headphones.
The 2 screens below show displays that would typically appear when tuned to a monophonic
station at 104.7 MHz. The display alternates between the 2 screens over an 8 second period.
The shaded fields would obviously vary depending on the frequency selected and on the
station’s signal parameters.
The fields indicate the selected receive Frequency, the frequency Deviation (FM Modulation),
the presence (or absence) of a Stereo (Mono) signal, the amount of carrier Frequency Drift
between the received carrier frequency and the FMBM’s highly-stable internal frequency
reference and finally, the Receive Signal Strength Indicator (RSSI). If the High-Level RF input
is selected, RSSI is replaced by Lvl, and the units become Volts instead of dBm.
If the AM band is selected, typical displays would be as shown below, where Mod is the AM
Modulation index.
When the signal source is set to MPX, these the following screen is displayed:
Freq 104.70 MHz
Dev 64kHz MONO
F Drift -0.25kHz
RSSI -59dBm MONO
Freq 800.0kHz
Mod 100% MONO
F Drift -.1kHz
RSSI -68dBm MONO
MPX IN
Dev 75kHz MONO

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4.1.2 Menu selection mode
Pressing the MENU button once will display the first menu item. Pressing the UP (or DOWN)
button after the first MENU press scrolls to the next (or preceding) menu item. Pressing a
second time selects that menu item and allows it to be modified by pressing the UP or DOWN
buttons. The table below presents the menu items in order and their possible settings.
UP/DOWN steps
First press on MENU
Second press on MENU
1
Exit
Firmware v1.x.x
2
Band AM FM
Band AM FM
^FM
3
Tuning Step
Tuning Step
^200 kHz {or 50 kHz, 100 kHz}
4
Frequency
Frequency
^107.5 MHz
5
Alarm Display
^No Alarms
{or list of active alarms}
6
RF Input
RF Input
^Antenna {or High Level}
7
MPX Mode
MPX Mode
^Input {or Output}
8
Source
Source
^Tuner {or MPX Input)
9
Audio Level
Audio Level
^+8 dBm
10
Peak Deviation*
Limit
Peak Dev Limit
^75 kHz
11
Peaks/min Count
Peaks/min Count
^8
12
Low Deviation*
Limit
Low Dev Limit
^0 kHz
13
Low Deviation*
Timeout
Low Dev Timeout
^30
14
Power Monitor Calibration
Pwr Mon Cal
^Ref Lvl = {or Set New Level}
15
Low Power Limit
Low Power Limit
^-3 dBm
16
Frequency Drift
Limit
Freq Drift Limit
^1.0 kHz
17
Stereo Alarm
Setting
Stereo Alarm
^Disabled
18
RDS Data
{Program Station}
{Program Type} {Radio Text}
19
RF Alignment
RF Alignment
^ 62 RSSI: -64dBm
20
Firmware Upgrade
Firmware V 1.4
^Cancel {or Update}
21
Exit
Firmware v1.x.x
Table 2. Menu items and description
*Note that on the AM band, the term Deviation is replaced by Modulation

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1- Exit exits the Menu selection mode and returns to the default display. Note that an Exit
exists at both the very beginning and very end of the Menu Selection mode. Firmware
version is also shown in the Exit screen.
2- Band AM-FM allows selection between the AM and FM broadcast bands. Note that an
appropriate antenna or high-level signal must be connected to the rear-panel connectors.
3- Tuning Step allows selection between steps of 50, 100 or 200 kHz when tuning across
the FM broadcast band. In AM Mode, the steps are 1 and 10 kHz. Note that certain
settings can produce difficult reception conditions. For example, if starting at 104.2 MHz
and selecting 200 kHz steps, one could never actually select actual operating frequencies
as used in North America (104.1, 104.3, 104.5 …).
4- Frequency is for the actual operating frequency of the receiver. Operating frequency
covers 88 to 108 MHz in FM mode and 520 to 1710 kHz in AM mode. Note that the
receive frequency doesn’t actually become active until the MENU button has been
pressed to exit the selection mode.
5- Alarm Display shows a summary of the alarms that are active in the unit.
6- RF Input selects internal calibration and settings to account for the 51dB attenuator that
is in series with the high-level input. Both the high-level and low-level (antenna) inputs
are connected together through the 51dB attenuator. Therefore, only one input must be
connected at a time for readings to be accurately measured.
7- MPX Mode selects the MPX connector as an Input or an Output.
8- Source selects the signal source: Tuner (Antenna) or MPX (MPX connector).
9- Audio Level sets the audio level for the rear-panel audio outputs and is adjustable from 0
to +10 dBm referenced to 600 Ω (0 to +10 dBu). This menu also sets the audio level of
the digital AES output on the rear panel. When the audio level is set to +8 dBm, the audio
level on the digital AES output is -14 dBFS.
10- Peak Deviation Limit sets the threshold above which the deviation peak counter will
increment. It is adjustable from 1 to 150 kHz.
11-Peaks/min Count sets the number of counts in the preceding minute above which the
High Deviation Alarm will become active. The count threshold can be set from 1 to 9
counts per minute. When the “OFF” mode is selected, the alarm will be active each time
the deviation exceeds the limit set in step 10, and it will toggle normal when the deviation
falls back below the limit.
12-Low Deviation Limit sets the level below which the Low Deviation Timeout timer starts. It
is adjustable from 0 to 79 kHz.
13-Low Deviation Timeout sets the number of seconds during which the deviation must be
continuously below the Low Deviation Limit for a Low Deviation Alarm to become active.

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14- Power Monitor Calibration operates in 2 different modes, depending on which RF Input
is selected (Antenna or High Level in Menu step 6). If Antenna input mode was selected,
pressing the MENU button here in Menu step 14, sets a new reference level that is used
by the FMBM as the normal receive signal level. See Menu step 15 for setting the alarm
level that will be x dB below this normal level.
If High-level input mode was selected in Menu item 6, the display shows the voltage that
is output to the rear panel RF Power Monitor output. This output level is calibrated
through the front-panel potentiometer (RF Power Monitor Adjust.) while injecting a known
level of RF at the High-level input connector.
15-Low Power Limit sets the number of dB below the Power Monitor Calibration level
(Menu item 14) that will set a low-power alarm. It can be set from -1 to -9 dB for High-
level mode and from -1 to -99 dB for Antenna input mode.
16- Frequency Drift Limit sets the frequency range beyond which the FMBM will activate
the frequency drift alarm. It can be set to any value between 0.5 kHz to 10 kHz and is
only used on the FM band.
17- Stereo Alarm setting allows users to enable or disable the stereo presence alarm. This
is useful for stations that normally transmit in Mono mode only. It is used on the FM band
only.
18- RDS Data turns on the RDS data display mode that shows the {Program Station},
{Program Type} and {Radio Text} data as it is transmitted by the station. It is useable on
the FM band only for stations that do transmit RDS or RDBS data. RDS data is displayed
for a period of approximately 2 minutes and then the display reverts to its default mode.
19- RF Alignment allows fine tuning of the RF input circuit to optimize signal reception
depending on antenna type and matching. Selecting this Menu item displays a tuning
setting between 0 and 127 as well as an RSSI level in dBm. Press the up or down
buttons to change the tuning setting in order to maximize the receive signal level. Once
the highest signal is achieved, exit the Alignment mode by pressing the Menu button
again.
20- Firmware Upgrade allows users to upgrade the FMBM’s operating firmware to install
new versions that could incorporate improvements, new features and corrections to bugs.
Selecting this menu item, without pressing the upgrade button, also shows the current
version number of the firmware installed in the unit. See Appendix A for details.
21- Exit exits the Menu selection mode and returns to the default display. Note that an Exit
exists at both the very beginning and very end of the Menu Selection mode. Firmware
version is also shown in the Exit screen.

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4.2 Remote operation through Davicom unit
Using the supplied cable, connect your FMBM’s USB port to the back-panel USB Port on any
Davicom unit (DV-200, Mini and Micro). Note that the Davicom units MUST be running
Firmware Version 5.42 or higher. If this is not the version of Firmware you have, please go to
the www.davicom.com web site for support.
Power-up the FMBM and wait a few seconds for it to automatically sync with the Davicom. To
connect to the FMBM through the Davicom, first connect to the unit in your usual way, start-
up DavLink and connect to your unit.
Once connected, click on the Configuration icon in the DavLink Toolbar:
The following MAC Configuration window will appear. Select the Devices Tab
Figure 7. Configuration window.