MFJ MFJ-9200 Instruction Manual Download Page 6

TRANSCEIVER OPERATION 
 
Installing Band Modules: 

Prior to powering up, identify and install the filter module for 

the band you intend to use. The band is marked on the filter pc board. To access plug-in 
headers for the module, remove the two knurled screws securing the radio’s case and 
slide off the back. 
 

                             

Antenna

Module Header

Module Header

Standoff

Antenna

Band Label

Module

Screw

Band Module

 

The band-module headers are located directly below the BNC antenna connector. Line 
up the module and install it component-side down, as shown. Fasten in place using the 
module retention screw and reinstall the case. 

Note that the retention screw should 

always be used to ensure firm seating and good grounding. 

Also, note that a filter 

module must be installed for the DDS to recognize a band of operation.

 

      

 

 
Key Detection: 

The MFJ-9200 features a key-detection circuit. The sensing circuit 

initializes 

each time the radio is powered up

. If paddles are connected or if no key is 

installed, the keyer initializes in 

Automatic Mode

 and sends the letter 

A

 in code. If a 

straight key is installed when the radio is powered up, the keyer senses 

Manual Mode

 

and sends the letter 

M

 

Important Note:

 The radio’s default is 

Automatic Mode

. If a manual key is plugged in 

after the radio is powered up

, the radio will transmit a continuous string of dashes until 

the key is unplugged or the radio is rebooted. This condition occurs because the keyer 
misinterprets the manual key’s monaural plug as a ring-to-sleeve contact closure. To 
correct it, simply switch the power off and turn it back on again to re-initialize the keyer.  

 

      

 

Power On:

 After connecting a power source, antenna, headphones and key, you’re 

ready to begin. It may prove helpful to have your radio set up and connected to a 
dummy load when going through this portion of the manual so you can check out each 
function without causing on-air interference. Using the 

POWER

 switch located on the 

front panel, power up the radio and set 

VOLUME

 for a comfortable listening level.  

 

Boot Screen:

 During power-up, the LCD screen displays the selected band. Example: 

[

Band-20m

]. Also, the keyer side-tone sends the letter 

A

 or 

M

 in code to identify the 

type of key that is plugged in.  
 

 
 
 
 

Summary of Contents for MFJ-9200

Page 1: ...AUTION Read All Instructions Before Operating Equipment MFJ ENTERPRISES INC 300 Industrial Park Road Starkville MS 39759 USA Tel 662 323 5869 Fax 662 323 6551 COPYRIGHT 2011 MFJ ENTERPRISES INC C Model MFJ 9200 VERSION 1A ...

Page 2: ...sitional handbooks or other official publications The copy of this manual provided to the customer will not be updated to reflect current data Customers using this manual should report errors or omissions recommendations for improvements or other comments to MFJ Enterprises 300 Industrial Park Road Starkville MS 39759 Phone 662 323 5869 FAX 662 323 6551 Business hours M F 8 4 30 CST ...

Page 3: ...ion and a switched backlight for the LCD display There s also plenty of receiver overlap for monitoring time signals and international short wave broadcasting The MFJ 9200 runs on any power source between 8 and 15 VDC and draws 40 mA on receive with the display backlight turned off perfect for prolonged off the grid adventures Best of all the MFJ 9200 is the smallest and lightest backpack transcei...

Page 4: ...9 1 18 5 22 0 Trans mit MHz 3 5 4 0 7 0 7 3 10 1 10 1 5 14 0 14 3 5 18 06 8 18 16 8 21 0 21 4 5 Receiver MDS 0 1 uV all bands AGC Threshold 3 to 5 uV all bands Bandwidth Selectable 600 Hz CW 2 5 Hz SSB Audio Output 100 mW 8 Ohm load stereo plug Receiver Current Drain 40 mA no backlight 80 mA with backlight Transmitter Keying Iambic with straight key sensing Auto CQ memory Speed Range 3 45 WPM Tran...

Page 5: ...an external antenna tuner ATU Never intentionally transmit into high SWR loads as extreme mismatch may cause the radio to emit out of band signals exceeding FCC guidelines A prolonged high SWR condition may also damage internal components Headphones Use any 8 to 32 Ohm stereo headset outfitted with a 3 5 mm stereo plug Note that the radio s audio output circuit is not wired to accept monaural plug...

Page 6: ...in Automatic Mode and sends the letter A in code If a straight key is installed when the radio is powered up the keyer senses Manual Mode and sends the letter M Important Note The radio s default is Automatic Mode If a manual key is plugged in after the radio is powered up the radio will transmit a continuous string of dashes until the key is unplugged or the radio is rebooted This condition occur...

Page 7: ...s blocked Push Button Controls Front panel switches control most transceiver functions There are five red pushbuttons plus a momentary push in switch built into the TUNE knob Four switches activate more than one function and require two types of user input The primary switch input is a momentary press The secondary switch input is a two second press and hold The manual instructions are tap for a s...

Page 8: ...se incremental tuning tap RIT to toggle it on and off When active the frequency display shifts to 10 Hz resolution and a dash symbol appears to the right of the last digit The dash symbol signifies zero RIT shift Rotate TUNE clockwise to move above zero shift and note that an up arrow appears on display When tuning below zero shift appears To restore zero shift tune opposite the arrow until the da...

Page 9: ...he finish avoid using harsh chemical cleaners on the cabinet or on plastic parts When backpacking or boating keep the radio dry by sealing it in a Baggie or Pelican case during transport If it should become wet remove the back of the case and allow all circuitry to dry out for an extended period before powering up Do not power up if you observe condensation in the LCD window and avoid heating at h...

Page 10: ... channel to tip left channel to ring ground to sleeve Display Window Segment 1 RX Mode CW or USB LSB supply voltage flashes every 4 seconds Ex 12 6 Segment 2 V VFO mode M Memory mode 1 8 number of memory channel Segment 3 Frequency Display 100 Hz readout normal 10 Hz with RIT Control Switch Functions MEM VFO Tap for M or V Press to enter displayed frequency to memory VFO ÆMEM TUNE ROTATE TO TUNE V...

Page 11: ...ESS CALL AND HOLD FOR S SET SPEED WITH PADDLES TAP TO EXIT ENTER CALL IN CQ MEMORY DEPRESS CALL AND HOLD FOR I ENTER CALL WITH PADDLES TAP TO EXIT CARRIER DEPRESS CALL AND HOLD FOR T HIT DASH TO ACTIVATE AND DOT TO DEACTIVATE TAP TO EXIT ...

Page 12: ...rvice Department at 662 323 0549 or the MFJ Factory at 662 323 5869 4 This warranty does not apply to kits sold by or manufactured by MFJ Enterprises Inc 5 Wired and tested PC board products are covered by this warranty provided only the wired and tested PC board product is returned Wired and tested PC boards installed in the owner s cabinet or connected to switches jacks or cables etc sent to MFJ...

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