- 5 -
When activated, allows adjustment of the receive frequency above or below the channel frequency by
up to 800Hz. Although this control is intended primarily to tune in SSB signals, it may be used to
optimize AM signals as well.
17. CLARIFIER LED
This LED lights when the Clarifier control is activated.
18. NB SWITCH
When this switch is pressed in, the Noise Blanker is activated. The Noise Blanker is very effective in
eliminating repetitive impulse noise such as ignition interference.
19. VOLUME CONTROL
Turn clockwise to set the desired listening level.
20. SQUELCH CONTROL
This switch is used to eliminate background noise being heard through the receiver which can be
disturbing when no signal is being received. To use this feature of your radio, gently turn the switch
fully counterclockwise, and then turn clockwise until the background noise is just eliminated. Further
clockwise rotation will increase the threshold level so that only strong signals will be heard.
21. TALKBACK CONTROL
Adjust this knob for desired volume of Talkback. This is used to monitor your own voice. For example,
you could use this feature to compare different microphones.
22. POWER ON/OFF SWITCH
Push this switch to apply power to the unit.
23. FRONT PANEL METER
The Front Panel Meter allows the user to monitor incoming signal strength, RF output power, SWR
and AM Modulation level.
24. TX/RX LED
This LED lights red during transmit and green during receive.
25. CHANNEL DISPLAY
The channel display indicates the current selected channel.
26. SWR ALERT LED
This LED lights red when your SWR is higher than about 3:1. This is not an exact indicator of 3:1
SWR, but it is an indication that you should check your SWR reading.
27. GNF LED
This LED lights red when the GNF is on.
28. R.B. LED
This LED lights red when the Roger Beep is on.
29. FREQUENCY COUNTER
This display indicates the frequency of the selected channel.
30. PA LED
This LED lights red when the radio is in the PA mode.
Summary of Contents for DX 2547
Page 12: ...12...
Page 13: ...13...
Page 17: ...17 Figure 4 1 Transmitter test setup Figure 4 2 Receiver test setup...
Page 20: ...20...
Page 23: ...23 PART LIST...
Page 27: ...27...
Page 31: ...31...
Page 39: ...39 DX 2547 MAIN PCB...
