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MAXON
SP-300 HAND HELD
Page -21-
May 2001
PROGRAMMING
The SP-300 Series portable radios require the ACC-2300
programming cable. With the 25 pin “D” type connector
installed on the computer, take the other end of the program-
ming cable and insert it in the receptacle located on the
opposite side of the PTT on the radio. For further informa-
tion, please refer to the ACC-904 Programming Manual.
Cloning
Following the steps below, the frequencies and functions can
be programmed from radio to radio by using a cloning cable.
1. Ensure that both radios’ power switches are in the
“OFF” Position.
2. Place master radio (the radio which already has
desired program information in the EEPROM) in
the data “WRITE” mode by holding the radio’s
monitor switch and then turning radio power switch
to the “ON” position (the green LED on the radio
flashes). Release monitor switch on the fourth led
flash. (The radio LED will change to alternating red
and orange flashes.)
3. Place the slave radio (the radio which is not pro-
grammed, or has program information that will be
revised) into data “READ” mode by holding moni-
tor switch and then turning the radio power switch
to the “ON” position (the green LED on the radio
flashes). Release the monitor switch on the third led
flash (the LED will change to alternating green and
orange flashes).
4. Connect the cloning cable through mic jack.
5. Press the slave radio’s monitor switch. The alternat-
ing green and orange flashing will stop.
6. Press the master radio’s monitor switch. The alter-
nating red and orange flashing will stop. Release
the monitor switch, the green led of both radios will
flash.
7. After cloning, the slave radio resets and works nor-
mally with re-programmed frequency, and the mas-
ter radio flashes orange led. Press monitor switch,
and then the radio will repeat step 2).
8. For cloning other radios, repeat steps 3 through 7.
ALIGNMENT PROCEDURE
The SP-300 U/V Receiver is by design, broad band, cover-
ing UHF(440 to 470 MHz) and VHF(148-174MHz) and
should require no special alignment, unless repairs are per-
formed on the receiver portion. The only alignment normally
required is to the squelch circuit.
SQUELCH ADJUSTMENT
1. Select a receiver channel that is programmed for
narrow band (12.5kHz) operation.
2. Set the RF signal generator to the receiver fre-
quency. Set the AF modulation signal to 1 kHz at
1.5K deviation.
3. Adjust the RF output level of the RF signal genera-
tor until the 1kHz signal is heard.
4. Adjust the RF signal to the level desired for squelch
sensitivity as you monitor SINAD. This is usually
8dB to 12 dB sinad.
5. On the Main board, adjust RV2 until the squelch is
just unmuted (open).
6. Switch off the RF generator (squelch should close).
7. Switch on the RF generator, Squelch should open at
the SINAD point where RV2 was adjusted.
8. Select a receiver channel that is programmed for
wide band operation (25kHz).
9. Set the RF signal generator to the receiver fre-
quency. Set the AF modulation signal to 1 kHz at
3K deviation.
10. Adjust the RF output level of the RF signal genera-
tor until the 1kHz signal is heard.
11. Adjust the RF signal to the level desired for squelch
sensitivity as you monitor SINAD. This is usually
8dB to 12 dB SINAD.
12. On the Main board, adjust RV4 until the squelch is
just unmuted (open).
13. Switch off the RF generator (squelch should close).
14. Switch on the RF generator, Squelch should open at
the SINAD point where RV4 was adjusted.