Magnum AlphaForce User manual

OPERATING MANUAL
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Copyright © 2000 by Magnum International. All rights reserved.

TABLE OF CONTENTS
Introduction ......................................................................................................... 4
Limited Warranty ................................................................................................. 5
Installation ...................................................................................................... 6 - 7
Front Panel Controls .....................................................................................8 - 11
Rear Panel .........................................................................................................11
Other Features...................................................................................................11
Specifications.................................................................................................... 12
Contact Information........................................................................................... 12
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INTRODUCTION
Congratulationson your purchase ofaMagnumAlphaForce10meter FM/AM transceiver.TheAlphaForce is
designed to provide years of enjoyment and trouble-free service. There are many features and functions
designed into this transceiver. To ensure that your investment is enjoyed to its fullest extent, please take a
few moments and thoroughly read this manual.
The Magnum AlphaForce is a microprocessor controlled, user programmable radio combining high RF per-
formancewith a user-friendlyenvironment.TheAlphaForceis built ruggedtowithstandyears of use inharsh
mobile environments. Although engineered with mobile use in mind the AlphaForce, with the addition of a
high quality 10 amp regulated power supply, may be easily adapted to fixed station operation.
Some of the features of the AlphaForce are; an advanced design liquid crystal display that provides the
operator with a full visual account of the transceivers operating status, automatic frequency scanning from
either the front panel or microphone, memory storage of your favorite frequencies, programmable frequency
resolution of either 1 kHz, 10 kHz or 100 kHz, and split (offset) frequency operation for repeater use. These
are just a few of the features that make the AlphaForce a pleasure to own and operate.
IMPORTANT : The Magnum AlphaForce is designed for entry level amateur use. If the transmitter is oper-
ated in the United States or within it’s territories a licensed amateur radio operator must be present at the
station. The minimum license class to operate 10 meter phone is Novice/Technician. If you are studying for
yourlicenseand want to familiarizeyourselfwiththeoperationof the radio, thereceivermaybeoperatedwith
or without a licensed operator present. For more information regarding FCC licensing, contact your nearest
amateur radio dealer, or for complete details contact the American Radio Relay League.
American Radio Relay League (ARRL)
225 Main Street
Newington, CT 06111
Telephone [phone]
Facsimile 860-594-0259
http://www.arrl.org
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LIMITED WARRANTY
Magnum International warrants this product to be free of defects for a period of one (1) year from the original
date of purchase. This warranty is non-transferable. This limited warranty is subject to repair or replacement
of defective components only. This warranty is void if the radio has been tampered with or misused.
IMPORTANT: RETAIN YOUR SALES RECEIPT
The enclosed warranty registration form must be filled out and mailed along with a photocopy of your sales
receiptwithin 15 days fromthepurchasedate. If the warrantyregistrationformandcopy of yoursalesreceipt
are not received the radio is not covered under warranty. Please fill out the enclosed warranty registration
form and send it along with a copy of your sales receipt to:
MagnumInternational
PO Box 445
Issaquah, WA 98027
Registering your AlphaForce with Magnum provides several benefits:
1) Validates your warranty.
2) Entitles you to free updates and information regarding your radio and new accessories for your radio.
3) Provides possible recovery of lost or stolen radios through our serial number tracking database.
4) Receive your free Magnum logo baseball cap within 30 days after registering.

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INSTALLATION
1. CONTENTS
Unpackandinspectyour MagnumAlphaForceformiss-
ingordamagedcomponents.YourAlphaForceincludes
the following items:
Quantity Description
1 Magnum AlphaForce Transceiver
1 Microphone with Up/Down Controls
1 DC Power Cord with Inline Fuse
1 Mounting Bracket with Hardware
1 Microphone Hanger with Hardware Set
1 Operating Manual with Schematic
2. MICROPHONE HANGER
The microphone hanger may be attached to the side
ofthetransceiver, or anyotherconvenientlocation.Use
the provided screws to attach the microphone hanger
either vertically or horizontally to the side of the trans-
ceiver.
3. MOUNTING
When attaching the AlphaForce mounting bracket to
the vehicle, choose a location that will provide easy
access to all front panel controls and air circulation to
the rear panel. When selecting a mounting location,
make sure that there is ample space behind the con-
trol deck for the cables. Do not pinch, or bend sharply,
the power or antenna cables. Do not install the
AlphaForce in any compartment that restricts airflow
and do not install in a location that interferes with the
safe operation of the vehicle.
Attach the mounting bracket to the vehicle first then
mount the AlphaForce to the bracket. If the rear panel
is not accessible you may want to attach the power
and antenna cable prior to mounting.
4. ELECTRICAL CONNECTIONS
The Magnum AlphaForce is designed to work on any
13.8 volt DC, negative ground, source. The condition
of a vehicle’s electrical system can affect operation. A
low battery, worn generator/alternator, or poor voltage
regulator will seriously impair the performance of the
transceiver. Anyoftheaboveconditionscould result in
a high level of receiver noise generation or a substan-
tial loss of the transmitter’s RF output. Make sure that
allofthesecomponentsof your vehicle’selectrical sys-
tem are in good condition prior to installing the trans-
ceiver.
CAUTION! VOLTAGE EXCEEDING 15 VDC
WILL DAMAGE THE RADIO. MEASURE VOLT-
AGEATBATTERYTERMINALS,WITHVEHICLE
RUNNING, PRIOR TO INSTALLATION!
Before making any electrical connections make sure
the volume/power control on the AlphaForce is in the
“OFF” position.
Connectthe positive (+) redwireofthe DC power cord
to a positive 13.8 volt source at the vehicle fuse block.
If connecting to the fuse block, it is recommended that
a switched power source is used so that the power to
thetransceiveris disconnected when thevehicleisoff.
Thiswilleliminatethe possibilityofthetransceiverdrain-
ing the vehicle’s battery.
Connect the negative (-) black wire to a metal part of
thevehicle’sframe, or chassisground.Makesure that
this is a good ground connection.
The AlphaForce power cord may also be connected
directly to the battery. Connecting directly to the bat-
tery has several benefits, the first of which is to maxi-
mize RF output. Secondly, the battery is a very large
capacitorand will helpeliminatecertain types ofambi-
ent and vehicle noise. If connecting directly to the
vehicle’s battery, additional power cable may be re-
quired.Onrunsof8feetorlessuse14-gaugestranded
wire. Use 12-gauge wire on longer runs.
5. ANTENNA CONNECTION
The transceiver will operate using any standard 50-
ohm ground-plane, vertical, mobile whip, long wire or
similar antenna. The antenna should be rated at 50
wattsPEPminimum.A standard SO-239 type antenna
connector is located on the rear panel of the
AlphaForce. Connection is made using a PL-259 and
high grade coaxial cable (RG213, RG58A/U or Mini
RG-8 is recommended).
Aground-planeantennaprovidesgreater coverageand
is recommended for fixed station-to-mobile operation.
For point-to-point fixed station operation, a directional
beam antenna operates at greater distances even un-
der adverse conditions. A non-directional antenna
should be used in a mobile installation; a vertical whip
is best suited for this purpose. The base loaded whip
antenna normally provides effective communications.
For greater range and more reliable operation, a full
quarter wave whip may be used. Either of these an-
tennasusesthe metal vehicle bodyasagroundplane.
Oncethe antenna is mountedonthevehicle, route the
coaxial cable so that it is not next to any power cables
or vehicle cables. Connect the PL-259 to the antenna
connector on the rear panel of the AlphaForce. Make
sure that the cables does not interfere with the safe
operation of the vehicle.
The Penetrator™ and Super Penetrator™ mobile an-
tennas, available from RF Limited, are the perfect an-
tennas for use with the Magnum AlphaForce. The
Penetrator™ and Super Penetrator™ feature power
ratingsof up to3,500watts PEP andbandpassratings
of 1.5 MHz, the widest bandpass of any mobile an-
tenna of its kind.

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6. VSWR
Before use, it is important to determine the antenna
system’s VSWR (voltage standing wave ratio). First,
make sure the SWR bridge (meter) is in good working
order and is calibrated. To ensure your radio is per-
forming properly the VSWR should never exceed 1.5
to1. Never transmitonanyantenna system wherethe
VSWR exceeds 1.8 to 1. This will stress the output
stageandcould destroy the RFtransistors;thistypeof
misuse and failure is not covered under warranty.
MeasuretheVSWRatthecenter of theoperatingband.
Tune the antenna (according to the manufacturer’s
tuning instructions) so that the VSWR is as close to
1.1 to 1 at the center of the operating band.
Next, measure the VSWR at the lowest and highest
frequencyof the transceiver.If the antenna hasawide
enough frequency range and band-pass, the VSWR
readings should be below 1.5 to 1 across the entire
operatingband.Ifatthelowerorupperendof the trans-
ceiveroperatingfrequency,theVSWRmeasuresmore
than 1.5 to 1, it is recommended that the antenna be
re-tuned before operating on those frequencies.
Ifyouareexperiencingunusual VSWR readings check
for the following possible problems:
1) Make sure that the antennais installed properlyand
grounded.
2) Check all coaxial cable and connectors for defects
and poor routing.
3) If testing a vehicle installation, make sure that all
vehicle doors are closed when testing.
4) Do not test near or around large metal objects or
buildings.
7. IGNITION NOISE
Incertain vehicle installations,electricalnoiseorinter-
ferencemaybepresentinthereceiveaudioof thetrans-
ceiver. Typically the vehicle’s ignition system or more
specifically the alternator generates this noise. The
Magnum AlphaForce is equipped with a noise blanker
circuit that is designed to improve, and in many in-
stances eliminate, this electrical noise.
In extreme cases, the noise blanker may not eliminate
all the electrical noise. In such cases, an after-market
alternatornoiseorignitionnoisefiltercanbepurchased
and installed according to the manufacturer’s instruc-
tions. If purchasing an alternator noise filter for the
Magnum AlphaForce make sure the filter is rated for
at least 10 amps continuous current draw.

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FRONT PANEL CONTROLS
1. OFF / VOLUME CONTROLS
OFF: Turns the power to the radio on and off.
VOLUME: Adjusts the AF gain, or volume of the re-
ceived audio. Turn clockwise to increase and counter-
clockwise to decrease.
2. SQUELCH CONTROL
Used to eliminate background or “white” noise when
monitoringstrong signals. Also usedtoactivateSCAN
feature (refer to 20). To properly adjust the squelch
circuit, start rotating the control slowly clockwise until
the received white noise disappears.
3. MICROPHONE GAIN CONTROL
Increases or decreases the energy developed in the
microphoneamplifiercircuit.The gain increases as the
control is rotated clockwise.
For optimum setting, press the push-to-talk (PTT)
switch on the microphone. While speaking in a con-
stant tone (such as saying the word, “four-r-r-r-r”) ad-
justthe mic gain controluntiltheLCDpeakreading RF
meter (refer to 24) reads +30. Next, rotate the control
counterclockwise until the +30 segment of the display
starts to flicker. The microphone gain should now be
set to maximum modulation without distortion.
1
2
35 6 8 10 11
4 7 9
4. RF GAIN CONTROL
Adjuststhereceiversensitivityto bothsignalsandback-
ground noise. This affects the distance at which a sig-
nal can be detected. Turning the control counterclock-
wise reduces the receiver sensitivity. This is particu-
larlyuseful in areas wherelargevolumesoftraffic(sig-
nals) are present. The S/RF meter (refer to 13) indi-
cates the received signal’s strength.
5. RB / S/RF / CAL / SWR CONTROL
ROGER BEEP:RB position activates theendoftrans-
mission, or roger beep, tone. When activated a 1 kHz
tonewillautomaticallytransmituponreleaseofthePTT
switch. This notifies contacts that your transmission
hasendedandyou are ready to receivetheirsignal.To
turnoff the roger beep,puttheswitchinthe S/RF posi-
tion. NOTE: In the RB position, the meter (refer to 13)
measures S/RF.
SIGNAL STRENGTH / RF METER: S/RF position ac-
tivates the meter (see 13) to measure receive signal
strength and transmitter RF output power.
16
20
17 18 19
21
24
22 23
13
12
15
14

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CALIBRATE:CALposition activates themeterto cali-
brate for SWR measuring. To calibrate for SWR, set
the switch to the CAL position, press the PTT switch
androtatethecalibrate control(referto7)untilthe meter
(refer to 13) needle lines up with the CAL mark on the
far right side of the meter. Once lined up, release the
PTT. The transceiver is now ready to measure SWR.
NOTE: When first attempting to calibrate make sure
the transceiver is in the AM mode (refer to 22). If it is
notpossibletocalibrateinAM,thenswitchtoFMmode.
STANDING WAVE RATIO:SWR position activates the
meterto measure thestandingwaveratioof the trans-
ceiver and antenna system. After the meter is cali-
brated, set the switch to the SWR position and press
the PTT switch. The meter (refer to 13) will measure
the SWR. For optimum performance the SWR should
be below 1.5 to 1, the first green segment on the SWR
portion of the meter indicates an acceptable standing
wave ratio.
6. ALL MODE TALK BACK CONTROL
All Mode Talk Back, a Magnum exclusive, is an inde-
pendent talk back monitor. The AMT functions in all
modes and allows the operator to monitor the trans-
mitted audio of the AlphaForce. To increase the vol-
ume of the talk back rotate the control clockwise. To
decrease rotate counterclockwise. To turn off the talk
back rotate the control completely counterclockwise.
7. CALIBRATE CONTROL
Rotatetocalibratethemeter(referto13)forSWR mea-
surements. See instruction 5 for more information.
8. ECHO ON/OFF and VOLUME CONTROL
Turns on and off the echo feature, and varies the vol-
ume or number of repetitions. To turn on the echo fea-
ture and increase the echo volume, rotate the control
clockwise. To turn off the echo feature rotate the con-
trol completely counterclockwise to the OFF position.
9. ECHO DELAY CONTROL
Variesthe amount of delay,ordurationofthe echo rep-
etition. Rotate clockwise to increase the amount of
delay and counterclockwise to decrease.
10. POWER
Rotate clockwise to increase RF output power. Rotate
counterclockwise to decrease RF output power.
Variable RF output power allows low power transmit-
ting for QRP operation in compliance with the FCC re-
quest for reduced signal strength during periods when
propagation levels are high.
11. FREQUENCY
Rotate clockwise or counterclockwise to select the
desired frequency.
12. MICROPHONE INPUT
A 6-pin, lock ring type, microphone connector is used.
Microphone wiring is as follows:
Pin 1 : Microphone Audio
Pin 2 : Receive
Pin 3 : Transmit
Pin 4 : Down (Up w/ 22K Ohm Resistor)
Pin 5 : Ground
Pin 6 : +13.8 VDC
13. METER
Themeter indicates receive signalstrength,RFoutput
power, SWR calibrate and SWR. The top horizontal
bar graph indicates calibration and measuring of the
standing wave ratio. The center bar graph indicates
RF output power. The bottom bar graph indicates re-
ceive signal strength.
14. PUSH-TO-TALK SWITCH
Press and hold the switch to transmit. TX will appear
on the LCD screen when transmitting. Release the
switch to receive.
15. UP and DOWN FREQUENCY CONTROLS
Allowsremoteoperationofthefrequency control. Press
the up arrow to increase the frequency and press the
down arrow to decrease the frequency.
IMPORTANT!
Operating some of the features in 16 through 23 re-
quire the use of the function control. To activate the
function control, momentarily push the FUNC (16) con-
trol, the FUNC prompt will be displayed in upper left-
hand corner of LCD. Push the control again to deacti-
vate the function control.
16. FUNCTION
This control is used to operate the functions that are
printed below the control buttons. To activate, press
and release. FUNC will be displayed on the LCD indi-
cating that the function command is activated. After
youhavepressedone of the buttons theFUNCprompt
will disappear from the screen.
17. STEP / NB / 1
STEP: The STEP control selects frequency resolution
in either 1 kHz, 10 kHz or 100 kHz steps. Press the
STEP button, one of the digits will flash on and off.
PresstheSTEP button again to changesteppingreso-
lution.

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To tune frequencies in either 10 kHz or 100 kHz incre-
ments, press the STEP button until the desired digit is
flashing. Rotate the FREQUENCY control in either di-
rection. The entire frequency range of the Magnum
AlphaForce can be stepped through in 10 or 100 kHz
increments.
To tune in 1 kHz increments, press the STEP button
untilthe1 kHz digit flashesonandoff. Rotate theFRE-
QUENCY control. NOTE: When stepping in 1 kHz in-
crements, you are limited to tuning within a 10 kHz
frequencyrange.
NB: Turns the noise blanker and automatic noise lim-
iteronandoff.Thenoiseblankercircuiteliminatespulse
type interference usually associated with automotive
ignition systems. The automatic noise limiter reduces
atmosphericrelatednoise.ToactivatetheNBandANL,
pressthe FUNC controlandthen press theNBbutton.
NBandANLwillappearon the LCDindicatingthenoise
blanker and ANL are turned on. To turn off the NB and
ANL, repeat the same process.
1: Memory Channel 1. After programming this button
is memory channel 1. See M.LOAD \ M.SAVE control
for programming instructions.
18. CALL / 2
CALL: The call frequency is 29.300 MHz, FM. The
radio’s operating frequency and mode are automati-
cally reset to this when the CALL button is pressed.
2: Memory Channel 2. After programming this button
is memory channel 2. See M.LOAD \ M.SAVE control
for programming instructions.
19. DIMMER
Press the DIM, or dimmer control, to decrease the
amount of back-lighting on the front panel and LCD
screen.
20. SCAN / SHIFT / 3
SCAN: Scans in increments of 10 kHz. There are two
ways to scan using the front panel controls.
(1) Receive Audio On Scanning: Press the SCAN but-
ton. Scan rate is one step every 5 seconds. To stop
scanning press the SCAN button again, or momen-
tarily press the PTT button on the microphone (scan-
ning will stop without transmitting).
(2)Receive Audio MuteScanning:Carefullyrotatethe
squelch control a minimum excursion (refer to 2) until
thereceiveaudio is off.Thereceiverscanratewillnow
be five frequencies per second. When a signal is de-
tectedthesquelchisautomaticallydisengagedandthe
scanning is paused. The squelch circuit will automati-
cally re-engage and the receiver will continue to scan
the moment the received signal is no longer detected.
SHIFT: Used for programming offsets to operate re-
peaternetworks. The AlphaForce cantransmitandre-
ceive on different frequencies.
To program the offset,press theFUNCbuttonandhold
down the SHIFT button for 3 or more seconds. Three
digits will appear on the LCD. This is the offset fre-
quency in kHz. Rotate the FREQUENCY control until
the desired offset frequency is displayed. To return to
themaindisplaypresstheFUNCbuttonandholddown
the SHIFT button for 3 or more seconds, or momen-
tarily press the PTT button on the microphone (the
transmitter will not be engaged).
To activate the programmed offset frequency, press
the FUNC button, and then press the SHIFT button
once.+SHIFTisdisplayedon theLCD.TheAlphaForce
will now transmit on the frequency that is XXX kHz
greaterthanthe displayed, or receive,frequency(XXX
represents the programmed offset frequency in kHz).
To transmit on the frequency that is XXX kHz lower
thanthedisplayed, or receive, frequencypressFUNC,
then the SHIFT button. Repeat this until -SHIFT is dis-
played on the LCD.
To disengage the programmedoffsetfrequency, press
the FUNC button and then press the SHIFT button.
Repeat this until the SHIFT indicator is no longer dis-
played on the LCD.
3: Memory Channel 3. After programming this button
is memory channel 3. See M.LOAD \ M.SAVE control
for programming instructions.
21. LCR / RPT / 4
LCR: Press the last channel recall button to return to
the last frequency and mode that was transmitted on
for more than 3 seconds.
RPT: Repeater Access Tone. Most repeaters require
an 88.5 Hz tone burst to access. To activate the 88.5
Hz tone burst, press the FUNC control and then press
theRPTbutton. RPT will appearontheLCDindicating
that the tone burst will now automatically be transmit-
ted whenever the PTT is pressed. To deactivate, re-
peat the same process.
4: Memory Channel 4. After programming this button
is memory channel 4. See M.LOAD \ M.SAVE control
for programming instructions.
22. MODE / TONE / 5
MODE: Press the MODE control to select the operat-
ing mode. The operating mode is indicated on the liq-
uid crystal display, AM or FM.

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TONE: Press the FUNC button, and then press the
tone button to turn on the receive audio tone control.
TONE will appear on the LCD indicating the feature is
activated.Thisfeature will roll-off highfrequencynoise
(i.e. “white” noise). Under many operating conditions
this will improve the clarity and understanding of re-
ceived signals.
5: Memory Channel 5. After programming this button
is memory channel 5. See M.LOAD \ M.SAVE control
for programming instructions.
23. M.SAVE / M.LOAD
M.SAVE: To save in memory a specific frequency and
operating mode, select the desired mode and rotate
the FREQUENCY control to the desired frequency.
Press the FUNC button, and then press the M.SAVE
button.S will appear ontheLCDnexttothe frequency.
While S is displayed, immediately press any of the
memory channel buttons (1 - 5). The mode and fre-
quency is now saved into memory. If the S indicator
disappearsbefore you press thememorychannelbut-
ton, the information will not be saved and the process
must be repeated.
M.LOAD: To load, or recall, any of the saved memory
channels press the M.LOAD button. L will appear on
the LCD for several seconds. While the letter is dis-
played press the desired memory channel button (1 -
5). The programmed mode and frequency will be dis-
played.
24. LIQUID CRYSTAL DISPLAY
The LCD screen is the status display for the majority
of the transceiver’s functions.
1) FUNCTION
Indicates the function button has been activated
and that the function dependent controls may be
accessed.
2) SCAN
Indicates that the transceiver is in scan mode.
3) +SHIFT / -SHIFT
Indicates that the split or offset frequency function
is activated.
4) RPT
Indicatesthatthe repeater access toneburstfunc-
tion is active.
5) NB and ANL
Indicatesthat both the noiseblankerandtheauto-
matic noise limiter are active.
6) TONE
Indicatesthat the receive audiotonelowfeature is
active.
7) 5 DIGIT FREQUENCY DISPLAY
Indicates transmit and receive operating frequen-
cies.
8) TX
Indicates that the transmitter is on.
9) FM / AM
Indicates the selected operating mode.
10) PEAK READING RF POWER METER
Indicates relative peak RF output power.
REAR PANEL
1. External Speaker Jack
An external speaker jack is located on the rear panel
of the transceiver. The Magnum AlphaForce is de-
signedto accept any standard8ohmexternalspeaker
for use with two-way transceivers.
OTHER FEATURES
1. PROGRAMMING TONE
This tone sounds each time the CPU is being pro-
grammed. It is helpful, in the beginning so you can be
surethe command has beenentered.You may turnoff
the tone by simply pressing the PTT switch on the mi-
crophone and turning on the ON/OFF POWER switch
at the same time. To turn the tone back on, repeat the
same process.
2. MEMORY BACK UP
The AlphaForce features a super-capacitor back up
for the 5 memory channels. The AlphaForce can be
disconnected from a power source for approximately
4 or 5 days before the memory is lost.
1 2 43 65 8
910
7

MAGNUM INTERNATIONAL
A Division of RF Limited
PO Box 445 • Issaquah WA 98027
Telephone [phone] • Facsimile 425-558-9704
Technical Support Only 1-877-MAGNUM-9 (1-877-624-6869)
http://www.magnum-radio.com
E-Mail [email protected]
GENERAL SPECIFICATIONS
Frequency Coverage : Transmit and Receive ...................................... 28.000 to 29.699 MHz
AntennaImpedance : 50 ohm, unbalanced
Frequency Control : Digital Phase-Lock Loop (PLL) Synthesizer
Frequency Accuracy : Better than +10 ppm from 0 - 40 0C after 15 min. warm up
Power Requirement : 12 - 13.8 V DC, negative ground
Current Consumption : 6 amps maximum
Dimensions : 7.75 x 2.5 x 10.75 in (W x H x D)
Weight : 4 lbs
TRANSMITTER SPECIFICATIONS
Power Output : FM.........................................................................................30 Watts
: AM ...................................................9 Watts Average / 30 Watts PEP
Tuning Steps : 1 kHz / 10 kHz / 100 kHz
Final Transistors : 2SC1969 (x2)
Spurious Emissions : More than 50 dB below peak output power
Carrier Suppression : More than 40 dB below peak output power
FM Deviation : +/- 2 kHz maximum
Audio Response : More than 30dB below peak output
Frequency Response : 400 to 2800 Hz
MicrophoneImpedance : ECM, 600 to 1K ohms
RECEIVER SPECIFICATIONS
Circuit Type : Dual-Conversion Superheterodyne
Intermediate Frequencies : 1st IF ................................................................................10.695 MHz
: 2nd IF.....................................................................................455 kHz
Sensitivity : AM ................................................................ 1.0 µV at 10 dB S + N/N
: FM...................................................................0.3 µV at 12 dB SINAD
Selectivity : AM / FM .......................................... 6.0 kHz (-6 dB) / 18 kHz (-60 dB)
Adjacent Channel Rejection : Better than 70 dB
IF Rejection : Better than 80 dB for all frequencies
Frequency Response : 250 to 3000 Hz
Audio Output Power : 2 watts minimum at 10% THD with an 8 ohm load
Audio Output Impedance : 8 ohms