Albrecht DB 270, User Manual, Page: 41 / 88

This transceiver with dual frequency and dual displaying function can display two different RX
and TX frequencies at the same time under Frequency mode, while display two different
channel frequencies and relative parameters at the same time under Channel mode.
•
Under Frequency/Channel mode, Band A and B selectable through A/B key, if
shows A, all the operating of channel or frequency is on band A, while shows B
operating on band B.
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Under Frequency mode : the following 9 functions can be set respectively on both
Band A and Band B- frequency step, output power, squelch level, channel bandwidth,
CTCSS, DCS, Frequency shift direction, Offset frequency, and Channel displaying
mode.
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Under Channel mode : setting following seven functions on both Band A and B is
invalid: Stepping transmit output power, CTCSS, DCS, channel bandwidth, frequency
step, frequency shift direction and Offset frequency.
Setting Frequency Step (STEP) ----- MENU 1
In standby, press MENU+1 , the screen displays
Press MENU to enter, it shows “12.50K” press UP / DOWN to select the desired step, then press MENU
to confirm, press EXIT return to standby.
This transceiver has seven frequency steps available: 5.00KHz, 10.00KHz, 12.50KHz, 25.00KHz,
50.00KHz and 100KHz.
Setting Squelch Level (SQL-LE) ----- MENU 2
This function means turn on the squelch when the signal is strong while turn off the squelch
when the signal is weak. The best setting is the level, where noise on an unused channel just
disappears. In most cases, a medium level around “5” is suitable. Setting the level too high
may not allow to receive weak signals, while setting too low may receive noise or other not
desired signal.
NOTE:
This transceiver has 10 (0~9) levels available, and 0 means turn on the squelch, from 1 to 9
levels shows different levels of noise reduction. Higher level, louder squelch. The intensity of
receiving signal is accordingly higher.
In standby, press MENU+2 , the screen displays
Press MENU to enter, it shows "5", press UP / DOWN to select the desired squelch level,
then press MENU to confirm, press EXIT return to standby.
Setting Battery Save Mode (SAVE) --- MENU 3
To save battery, this function can turn off the not always used receiver circuits a certain time
then turn on to check the signal again and so on.
In standby, press MENU+3 , the screen displays
Press MENU to enter, it shows "ON", press UP / DOWN to select turn ON/OFF the battery
save mode, press MENU to confirm, press EXIT return to standby.
Selecting Transmit Power (TXP) --- MENU 4
In Frequency mode, press MENU+4, the screen displays
Press MENU to enter, it shows "HIGH", press UP / DOWN to select HIGH/LOW power, then
press MENU to confirm, press EXIT return to standby.
This transceiver has appr. 5W and 1W output power selectable. Transmitting output power
can switch high/low temporarily. In transmission, pressing the TDR key can switch the output