BURK Technology RX-4 User manual

RX-4
USER’S MANUAL
May 28, 1997
Version 1.01
BURK Technology
7 Beaver Brook Road
Littleton , MA 01460

RX-4 User’s Manual -- Version 1.01 BURK Technology

BURK Technology RX-4 User’s Manual -- Version 1.01
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RX-4 USER’S MANUAL
Contents
INTRODUCTION.........................................................................................................1
PRODUCT DESCRIPTION.........................................................................................2
RX-4 Features and Overview.................................................................................................2
Specifications..........................................................................................................................3
RX-4 Front Panel ...................................................................................................................4
RX-4 Back Panel ....................................................................................................................6
INSTALLATION AND CONFIGURATION ..............................................................8
Physical Installation................................................................................................................8
Antenna Installation ...............................................................................................................8
Connecting The Audio Outputs..............................................................................................9
Making Connections for the Loop-Through (Hot Standby) Feature...................................10
How the Loop-Through Feature Works........................................................................................10
Connecting the Receivers for Hot Standby...................................................................................11
Powering Up.........................................................................................................................11
TUNING AND ADJUSTMENT .................................................................................14
Selecting the Monitoring Frequencies for the Receivers......................................................14
AM Receiver Tuning .....................................................................................................................15
FM Receiver Tuning......................................................................................................................17
WX Receiver Tuning.....................................................................................................................19
Adjusting Audio Output Levels...........................................................................................21
Monitor Selection and Volume Adjustment .........................................................................22
Technical Support ................................................................................................................23
APPENDIX: RX-4 SCHEMATICS

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BURK Technology RX-4 User’s Manual -- Version 1.01
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INTRODUCTION
This document is a User’s Manual for the Burk Technology RX-4, a professional-quality, digital-tuned,
four-channel radio receiver expressly designed for use with Emergency Alert Systems, in particular the
Burk Technology EúAúS unit.
The first part of this User’s Manual presents an overall description of the RX-4, featuring notes and
illustrations on the arrangement and functions of the front and back panel components, plus a set of
technical specifications (see “Product Description,” p. 2).
In the next section, the instructions are provided for installing and configuring the RX-4, including
physical installment of the unit (rack-mounting), antenna connections, wiring to the EúAúS, and the
implementation of the loop-through feature for hot standby (see “Installation and Configuration,” p. 8).
The final section details the operational adjustments required for putting the unit into service, including
tuning the receivers (featuring easy-to-use tuning charts for each module), adjusting audio output levels,
and selecting the receiver to monitor within the unit (see “Tuning and Adjustment,” p. 14).
Schematics (for the AM, FM and WX receivers, and the monitor amplifier) appear in the Appendix.

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PRODUCT DESCRIPTION
This section of the manual features an overall description of the RX-4, physically and functionally,
including a set of technical specifications -- for the unit as a whole, and for each of its component
receivers. It concludes with keyed illustrations of the front and back panels.
RX-4 Features and Overview
The RX-4 integrates four modular receivers, designed and packaged to provide a complete single-unit
solution to the requirements of Emergency Alert System (EAS) applications. Though it has been
designed, along with the LX-4 audio switch, to be a companion to the Burk EúAúS unit, the RX-4 will
provide superior performance with any EAS equipment.
As its standard configuration the RX-4 features an AM receiver, two FM receivers, and a NOAA Weather
Radio (WX) receiver -- the most adaptable conformation for handling the range of EAS monitoring
assignments in a single, easily installed, convenient-to-use unit.
Beyond the essential robustness and quality of its design, materials, and workmanship, the RX-4 is
specifically geared toward EAS applications in the professional environment by virtue of the following
features:
•Digital tuning, which keeps the RX-4 receivers locked on frequency, and capable of meeting the strict
demands of EAS operations, where receiver drift can mean missed alerts. Furthermore, tuning
controls are located inside the unit, providing the user with protection against the casual or
inadvertent changes in tuning that could cause lapses in compliance.
•High-performance receivers, with superior overload protection, enable the unit to be used in high-RF
surroundings, and near transmitting equipment, without compromising signal sensitivity or output.
•Loop-through capability, that permits chaining of the receivers (within a single unit, or even among
separate units) in a “hot standby” mode, both for maximum backup and for automatic coverage when
an assigned source is off the air.
Before we proceed to discussing how to install the unit, please take a moment to examine the technical
specifications on the next page, and to familiarize yourself with the RX-4 controls, indicators, and
input/output connections, presented in the front- and back-panel illustrations that appear following.

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Specifications
General
Receivers 4 interchangeable modules in any combination of AM, FM , & NOAA
Standard configuration is 1 / AM, 2 / FM, & 1 / WX
Monitor Amp 0.5W audio amp with built-in speaker
Monitor Channel Select Push-button with LED indication of monitored channel
Audio Connectors Combicon plug-in terminal strap type
Power Requirements 115VAC, 30W
Power Connector 6-1/2’ EIA power cord
Physical Size EIA rack mount; 19”W x 9”D x 1-3/4”H
AM Receiver Module
Frequency Range Digitally tuned 540 - 1720 KHz in 10 KHz steps
Sensitivity 5 microvolts for 12dB SINAD
AGC Range 80dB
Image Rejection 90dB
Adjacent Channel Rejection 45dB
Spurious Rejection 80dB
Overload Level -10dBm
Antenna 75-ohm Type F connector
THD <3% @ 30% modulation
Audio Output 10dBm max. into 600 ohms, balanced, fully adjustable
FM Receiver Module
Frequency Range Digitally tuned 88 - 108 MHz in 100 KHz steps
Sensitivity 5 microvolts for 12dB SINAD
IF Rejection 90dB
Image Rejection 60dB
Overload Level +20dBm
Antenna 75-ohm Type F connector
THD <3% @ 50KHz deviation
Audio Output 10dBm max. into 600 ohms, balanced, fully adjustable
WX Receiver Module
Tuning Range Digitally tuned to all 7 NOAA channels
Sensitivity 5 microvolts for 12dB SINAD
Image Rejection >60dB
Adjacent Channel Rejection 45dB
Spurious Rejection >60dB
Overload Level 0dBm
Antenna 75-ohm Type F connector
Audio Output 10dBm max. into 600 ohms, balanced, fully adjustable

RX-4 Front Panel
Cover
⇐Plates
Removed
NOTE: The type, number, and positions of the various receiver modules represent the standard configuration. Your unit may have been ordered with a different modular configuration; if so, disregard the illustrated left-to-right ordering of the
individual receiver units and reference them instead by type. If you’re not certain which receiver type occupies a particular module, they can be readily distinguished from one another by the number and arrangement of their tuning switches;
refer to the Tuning Control illustrations on pp. 15, 17 and 19.
12 9
10 11 12 17 18 19 20
34 25 26 27 28 33 34 3635
Receiver Module #1 (AM) Receiver Module #2 (FM) Receiver Module #3 (FM) Receiver Module #4 (WX) Monitor Section
6 7 8 14 15 16 22 23 24 30 31 32
5 13 21 29

#ID Functions / Features
Receiver
Module #1
(AM)
Receiver
Module #2
(FM)
Receiver
Module #3
(FM)
Receiver
Module #4
(WX)
Monitor
Section
1 9 17 25 Signal Indicator Lights when module is receiving signal
2 10 18 26 Output Level
Adjustment Opening for adjusting output audio pot without removing cover plate; admits 0.1” flat-blade mini-screwdriver
3 11 19 27 Cover Plate Removable panel; detaches for access to tuning controls
4 12 20 28 Write-On Strip
(with Module #) Erasable polycarbonate labeling surface; for marking call letters or frequency of tuning-selected signal source
5 13 21 29 Cover Plate Screws Phillips-head screws securing cover plate
6 14 22 30 Signal LED Illumination for signal indicator
7 15 23 31 Output Audio Pot One-turn potentiometer; for setting output audio level of
receiver; adjusted by 0.1” flat-blade mini-screwdriver inserted
through output level adjustment opening
8AM Tuning Controls 10-position DIP switch, accessed by removal of cover plate;
settings determine tuning frequency of AM receiver; tuning
chart provided on p. 16
16 FM Tuning Controls Two banks of DIP switches, 8-position and 4-position,
accessed by removal of cover plate; settings determine tuning
frequency of FM receiver; tuning chart provided on p. 18
24 FM Tuning Controls Two banks of DIP switches, 8-position and 4-position,
accessed by removal of cover plate; settings determine tuning
frequency of FM receiver; tuning chart provided on p. 18
32 WX Tuning Controls 7-position DIP switch, accessed by removal of cover plate;
settings determine tuning frequency of WX receiver; tuning
chart provided on p. 20
33 Monitor Speaker Unit studio monitor; plays audio from currently selected
receiver
34 Monitor Select
Switch Push-button switch; sequentially selects receivers 1 -4 for monitoring; fifth selection is OFF (no monitor)
35 Monitor Select
Indicator Row of LEDs , numbered 1-4; lit when corresponding receiver selected for monitoring
36 Volume Control Controls speaker volume (independent of receiver output level
adjustment )

RX-4 Back Panel
#ID Description / Connections
1Power Connection AC input 115 VAC; EIA-type
Receiver #4 (WX) [Weather Radio]
2Loop-Through 2 pins of Combicon 5-pin female connector; IN and OUT; provides chaining to other receivers for hot standby
3Audio Output 3 pins of Combicon female connector; balanced output (+, -, grd) to EúAúSencoder/decoder
4Antenna Connector Female F-type connector; to FM antenna or yagi via male F-type connector
Receiver #3 (FM)
5Loop-Through 2 pins of Combicon 5-pin female connector; IN and OUT; provides chaining to other receivers for hot standby
6Audio Output 3 pins of Combicon female connector; balanced output (+, -, grd) to EúAúSencoder/decoder
7Antenna Connector Female F-type connector; to FM antenna via male F-type connector
Receiver #2 (FM)
8Loop-Through 2 pins of Combicon 5-pin female connector; IN and OUT; provides chaining to other receivers for hot standby
9Audio Output 3 pins of Combicon female connector; balanced output (+, -, grd) to EúAúSencoder/decoder
10 Antenna Connector Female F-type connector; to FM antenna via male F-type connector
Receiver #1 (AM)
11 Loop-Through 2 pins of Combicon 5-pin female connector; only Loop OUT chaining for hot standby (Loop IN non-
functional)
12 Audio Output 3 pins of Combicon female connector; balanced output (+, -, grd) to EúAúSencoder/decoder
21 3 4 5 6 7 8 9 10 11 12 13
Receiver #4 (WX) Receiver #3 (FM) Receiver #2 (FM) Receiver #1 (AM)

13 Antenna Connector Female F-type connector; to ferrite core antenna via male F-type connector

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INSTALLATION AND CONFIGURATION
This section contains installation information, the procedure for configuring the RX-4, and a description
of how to implement the loop-through (hot standby) feature.
Physical Installation
The RX-4 unit requires a single-unit (1-3/4”) rack space. If the receivers are intended as an audio source
for an EúAúSunit, then proximity of the two units may be desirable, though not essential. Balanced high-
level outputs permit placement of the RX-4 up to 150 feet from the EúAúS, but it may be operationally
advantageous to locate the units immediately above and below one another.
Since switching among the various receiver components may sometimes be necessary, as well adjusting
the monitor volume, the RX-4 should be installed within convenient reach of the operator. (Easy front-
panel access is also of value in performing the initial audio-level adjustments.)
Additionally, the unit should be installed in a position and orientation that assures the visibility of the
front-panel indicators -- the LEDs that indicate the presence of signal on each of the receiver units, and
the LEDs that indicate which receiver is being monitored.
The final consideration in positioning the unit concerns its 9” depth, which is shallower than that of the
EúAúS. Depending upon the overall configuration and location of your rack, the difference in depth may
make access to the RX-4 rear panel difficult once it’s mounted. If this is the case, you may need to pre-
wire the antenna, output, and loop-through connectors (see following sections, pp. 8and 10), pass them
through the rear of the rack, and connect them up while holding the RX-4 in front of the rack. If you
adopt this approach, be sure to make the various leads long enough to accommodate it.
Antenna Installation
Each component of the RX-4 must be connected to an appropriate antenna; none of the modular receivers
will operate properly without an antenna hookup, preferably to an outside antenna. All of the antenna
inputs on the rear panel of the RX-4 unit are F-type female connectors (same as the common cable-TV
standard -- see “RX-4 Back Panel,” p. 6) and require a mating F-type male connector on the antenna lead.
•The AM receiver requires connection to a ferrite core or loop antenna; it will not function without
one. (Burk Technology manufactures a tunable ferrite core antenna, the RX-4AFA, designed
specifically for the RX-4.)
•The FM receivers can be connected, via a standard TV-type splitter, to a single FM antenna.
•In strong reception areas, the Weather Radio (WX) receiver may also be connected (again, via a
splitter) to the FM antenna; in regions where the NOAA signal is weaker, it may be necessary to
employ a yagi antenna (a suitable unit is also available from Burk Technology).
To continue the installation procedure, attach the appropriate antenna leads to each of the rear-panel
connectors. Refer to the back-panel illustration (p. 6) for proper attachment.

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Connecting The Audio Outputs
The RX-4 contains four receivers, any of which may be connected to the audio inputs of an EAS
encoder/decoder. In the case of the Burk EúAúSunit, there are six audio channels. As of publication of
this document, FCC rules require EAS users to monitor two assigned audio sources, but you may connect
all four receivers -- as backup, or simply for general monitoring purposes. All six audio inputs on the
EúAúSunit are available for monitoring, but please note that Channel 6 also doubles as a line input for
recording EúAúSmessages. It may be convenient to reserve this input and connect it permanently to a
console output for recording -- unless it is more critical at most times to employ Channel 6 for monitoring,
in which case the receiver and recording inputs can be switched only when there is a recording to be
made.
Please note further that if it is desirable to monitor more than four audio sources, a second RX-4 unit can
be connected to any unused EúAúS inputs. (For details on the EúAúS audio inputs and their configuration,
see the EúúAúúSUser’s Guide.)
The audio outputs are balanced (as are the corresponding audio inputs on the EúAúS unit), therefore it is
recommended to use two-wire twisted pair or shielded cables for the connections; Belden 8450 (solid) or
8451 (stranded) are appropriate.
Both the RX-4 outputs and the EúAúS inputs are Phoenix Combicon connectors (for which mating cable
connectors are provided in each case); these are plug-in terminal straps that can be prepared for use with
no tools other than a wire stripper and a small slotted screwdriver (such as a green Xcelite mini-
screwdriver -- also suited for adjusting RX-4 output levels, as described below).
The RX-4 installation kit contains four 5-pin male connectors. In each connector, audio output is carried
on the 3 rightmost pins (rightmost, with screwheads facing up, and pins pointing away from you, as in the
illustration below -- note also the corresponding labeled female connectors, on rear panel), and the 2
leftmost pins are used to implement the loop feature (see “Connecting the Receivers for Hot Standby,” p.
11). At this point, wire only the audio outputs on each mating block.
Combicon Mating Block
Loop
IN Loop OUT Audio +Audio -Audio
â

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To attach the mating connectors, strip the connecting wires at either end, then loosen the three rightmost
screws on the Combicons until they admit the appropriate stripped wire; then tighten the screws.
Install the cable connectors, with the mating plug to the RX-4 at one end of the cable, the EúAúS mating
plug at the other (note that the latter is a 6-pin dual connector, each one carrying two channels, and the
RX-4 outputs can be attached in pairs). If you are in any doubt about how to connect the EúAúS input
pairs, consult the EúAúSUser’s Guide.
When attaching the connectors, be careful to observe the correct polarities, as indicated on both units by
the rear-panel labels: plus, minus, and ground. The mating connectors can themselves be labeled (with
channel numbers, call letters, etc.) by marking with a felt-tip pen on the beveled face at the back of the
plug.
If you plan to make use of the loop feature, go on to the following section for further wiring instructions;
otherwise, go ahead and insert the plugs to connect the RX-4 and EúAúS units now.
Making Connections for the Loop-Through (Hot Standby) Feature
The loop-through feature of the RX-4 allows the individual receivers in the unit to have their inputs and
outputs linked so that one component can serve as a “hot standby” for another, if loss-of-signal occurs in
the latter unit. This feature is useful both for providing routine backup, and for covering particular
situations where reception might cease (e.g., if a source one normally monitors is off the air for certain
hours of the day).
How the Loop-Through Feature Works
The operating principle is as follows: The Loop OUT of the standby receiver is connected to the Loop IN
of the primary receiver (see “RX-4 Back Panel,” p. 6, for location of the loop connectors). If audio is
squelched on the primary receiver, then the signal from the standby is automatically routed through the
squelched channel. The loop will remain in effect until signal is once again detected on the primary
receiver; then the standby will cease routing its signal through.
For instance, suppose your EAS monitoring assignments consist of an AM station -- Receiver #1 -- and
the FM station to which Receiver #2 is tuned. By running a wire from Loop OUT of Receiver #3 (FM) to
Loop IN of Receiver #2, you would back up the primary FM assignment with the alternate FM station.
Furthermore, the individual receivers may be “daisy-chained,” that is, looped in a series of more than two
components. In a single RX-4 unit, for example, one could loop the OUT of Receiver #1 to the IN of
Receiver #2, then Receiver #2 to Receiver #3 in similar fashion, and finally, Receiver #3 to Receiver #4.
This arrangement would create a hot standby chain in which Receiver #4 is the primary, with Receiver #1
as the final standby component. If there is loss of signal in any or all of Receivers #2, 3, or 4, the output
channel of the failed receiver(s) will carry the audio coming in through its (or their) Loop IN. The source
of the audio to the non-receiving component(s) will be whichever receiver is the next functional unit up
the standby chain.
There is, however, one important exception to the loop feature as so far described: The AM receiver
cannot be looped through; in fact the Loop IN on the AM channel cannot be used (though AM Loop OUT
is fully functional). This situation arises from the general noisiness of the AM band, and the difficulty of
determining whether audio is truly squelched in order to trigger activation of the standby; AM loss-of-
signal simply cannot reliably be detected. In practical terms, this means that there is no hot standby for
the AM receiver (#1), though it can serve dependably as standby for any of the other receivers.

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Please note that it is also possible to loop a hot standby connector, or even daisy-chain, from one RX-4
unit to another (any number of them, in fact). The same considerations apply between units as within
units: the Loop OUT of the standby module goes to the Loop IN of the primary module (except for the
AM receiver, where the Loop IN is not functional). In such a case, the units so connected should be
adjacent to one another in the rack, for the shortest possible run of loop cable.
Connecting the Receivers for Hot Standby
Use single-conductor wire to connect the receivers you wish to link in hot standby mode. The wires attach
to the Combicon connectors in the same fashion as the audio output cables, discussed above. On each 5-
pin mating plug, the leftmost pin is Loop IN and the pin immediately to its right is Loop OUT, as
indicated in the figure below. For each individual standby loop, prepare a lead of the proper length and
strip both ends. Attach one end of the wire to the Loop IN pin of the primary receiver’s mating plug;
attach the other end of the wire to the Loop OUT pin on the mating plug of the receiver selected for
standby.
Combicon Mating Block
Repeat the process for as many primary-standby pairs as you require, daisy-chaining the connectors where
you wish a standby unit to be covered by a standby in turn. You may freely connect between separate RX-
4units, as well as among individual receivers within a single unit, taking care only to avoid connecting to
the Loop IN of the AM receiver’s plug, for the reasons noted above.
When all audio output and loop connections have been fashioned, simply plug the assembled 5-pin
connectors into the appropriate receiver channels; plug the 6-pin Combicons on the other ends of the
cables into the proper channel pairs on the EúAúS back panel. Now you’re ready to power the RX-4 up.
Powering Up
Once all the proper connections are made, you may power the unit up. Note that the RX-4 features no
power switch. As with the EúAúSunit it is designed to work with, the RX-4 is meant to be powered up at
all times, always supplying audio input to the EúAúSin accordance with the user’s assigned monitoring
Loop
IN Loop OUT Audio +Audio -Audio
â

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frequencies. Powering up the RX-4 is simply a matter of attaching and plugging in the EIA power cord
provided with the unit. The signal indicators on the front panel will not activate unless the corresponding
receiver is tuned to a receivable frequency and connected to a suitable antenna; however, you can verify
that the unit is powered up by observing the monitor LEDs -- see “RX-4 Front Panel,” p. 4. (If there are
no LEDs activated, it may be because the monitor selection switch is OFF -- press it once, and the
Receiver #1 indicator will light up if the unit is powered.)

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TUNING AND ADJUSTMENT
This section describes how to put the RX-4, once configured and powered-up, into operation by setting the
tuning frequency, adjusting the audio output level of each of the four receivers, and selecting the receiver
to monitor within the RX-4 unit.
Selecting the Monitoring Frequencies for the Receivers
To minimize the possibility of inadvertent resetting of the receiver frequencies, the tuning controls are
situated inside the RX-4 unit, behind the front panel. They are accessed by removal of the four front-
panel cover plates that display the labeling for each of the components.
Each cover plate is secured by two Phillips-head screws, at left and right (see “RX-4 Front Panel,” p. 4).
To access the tuning controls for any module, simply remove the two screws with a small Phillips
screwdriver (or slotted mini-screwdriver) and pull off the cover plate. In each module, the set of controls
is a bank of DIP switches (white switches on a red block) immediately behind the cover plate, on the right.
For each receiver type, there are a different number of switches in the tuning control,as illustrated with
cover plates removed in the figure below (and in the magnified illustrations on pp. 15, 17, and 19):
AM Module (Receiver #1) FM Modules (Receiver #2 & #3) WX Module (Receiver #4)
(The “Receiver #” designations refer to the standard configuration. If you have specified a different
configuration for your unit, then consider only the module type and refer to the module positions specified
on your invoice. If you do have a non-standard unit and lose track of which component is which, you can
identify the modules again by removing the cover plates and counting the DIP switches in the tuning
controls. As shown in the illustrations above, the AM module features 10 switches; the FM modules have
12 switches, in two banks, of 8 and 4; the WX module has 7 switches.)
The following sections discuss the frequency settings for each of the receiver modules in turn. If you are
setting up your RX-4 for the first time, you may wish to remove all the cover plates at once and tune all
the receivers sequentially. If you are simply resetting an individual receiver, then just remove that
individual cover plate and consult the instructions for the appropriate module type, below. There is no
need to power the unit down during tuning, though care must be taken to avoid damage to the components
during adjustment.
IMPORTANT NOTE: A close inspection of the any of the DIP switch banks would reveal a directional
arrow labeling the UP position as “On.” Please disregard these labels. As the instructions in the
following sections make clear, the correct switch position for “On” (= “1”) in the RX-4 implementation is
DOWN.
AM Tuning Controls
(10 switches) FM Tuning Controls (8 switches + 4 switches) WX Tuning Controls (7 switches)

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AM Receiver Tuning
With the cover plate removed from the AM module (the leftmost module on the front panel, labeled “1” in
the standard configuration), observe the DIP-switch bank on the right side of the opening. Here is a
magnified view:
AM Tuning Control
Switch positions = 0 0 1 0 0 1 0 1 0 1
The AM receiver is tuned by setting the switches in a binary pattern corresponding to the number of the
frequency in KHz, with the DOWN position of a switch representing “1” and the UP position representing
“0”. Setting is accomplished by flipping the switches up or down in the same pattern, left to right, as the
1s and 0s of the binary number.
The actual conversion formula is:
Switch setting in binary = (Frequency in Khz/10) + 46
In the example pictured above, the switches are set for a tuning of 1030 Khz (1030 divided by 10 is 103;
plus 46 is 149, which is 0010010101 in binary).
However, you do not need to calculate the switch settings; the complete set of tunings is presented in the
chart on the opposite page. Simply look up the AM frequency you wish to tune the receiver to, and the
proper DIP switch pattern is shown immediately to the right of that number.
Starting at the left, flip the switches up or down according to the 1s and 0s of the bit pattern in the chart.
You will probably find manipulation of the switches more manageable with the tip of a small plastic
tuning-type screwdriver (if you use a metal screwdriver or ball-point pen tip, exercise extreme care; the
unit is open and powered-up and there is the possibility of damage to the components).
Tuning will take effect as the switches are set; if you are monitoring the receiver you are tuning, you will
hear audio from different stations at the various intermediate switch settings you will pass through before
the final pattern is set.
Once the setting is made, compare the switch positions against the chart once more to assure correctness.
Then press the Monitor Select Switch (see “RX-4 Front Panel,” p. 4) until it indicates Receiver #1 (or the
appropriate receiver number in a non-standard configuration), adjust the volume control for audibility,
and monitor until the station ID is confirmed. To eliminate any later confusion, we recommend that you
mark the call letters or frequency of the station in the labeling space provided on the cover plate (the white
polycarbonate write-on strip that indicates the module number); pencil or erasable marker may be used,
but labelmaker strips or press-on lettering provide a more finished appearance.

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AM Tuning Chart
Frequency
in KHz Switch
Settings Frequency
in KHz Switch
Settings Frequency
in KHz Switch
Settings
550 0001100101 950 0010001101 1350 0010110101
560 0001100110 960 0010001110 1360 0010110110
570 0001100111 970 0010001111 1370 0010110111
580 0001101000 980 0010010000 1380 0010111000
590 0001101001 990 0010010001 1390 0010111001
600 0001101010 1000 0010010010 1400 0010111010
610 0001101011 1010 0010010011 1410 0010111011
620 0001101100 1020 0010010100 1420 0010111100
630 0001101101 1030 0010010101 1430 0010111101
640 0001101110 1040 0010010110 1440 0010111110
650 0001101111 1050 0010010111 1450 0010111111
660 0001110000 1060 0010011000 1460 0011000000
670 0001110001 1070 0010011001 1470 0011000001
680 0001110010 1080 0010011010 1480 0011000010
690 0001110011 1090 0010011011 1490 0011000011
700 0001110100 1100 0010011100 1500 0011000100
710 0001110101 1110 0010011101 1510 0011000101
720 0001110110 1120 0010011110 1520 0011000110
730 0001110111 1130 0010011111 1530 0011000111
740 0001111000 1140 0010100000 1540 0011001000
750 0001111001 1150 0010100001 1550 0011001001
760 0001111010 1160 0010100010 1560 0011001010
770 0001111011 1170 0010100011 1570 0011001011
780 0001111100 1180 0010100100 1580 0011001100
790 0001111101 1190 0010100101 1590 0011001101
800 0001111110 1200 0010100110 1600 0011001110
810 0001111111 1210 0010100111 1610 0011001111
820 0010000000 1220 0010101000 1620 0011010000
830 0010000001 1230 0010101001 1630 0011010001
840 0010000010 1240 0010101010 1640 0011010010
850 0010000011 1250 0010101011 1650 0011010011
860 0010000100 1260 0010101100 1660 0011010100
870 0010000101 1270 0010101101 1670 0011010101
880 0010000110 1280 0010101110 1680 0011010110
890 0010000111 1290 0010101111 1690 0011010111
900 0010001000 1300 0010110000 1700 0011011000
910 0010001001 1310 0010110001
920 0010001010 1320 0010110010 Switch Values:
930 0010001011 1330 0010110011 DOWN = 1
940 0010001100 1340 0010110100 UP = 0